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  • portable uv transmittance
    Our UVT-LED-H Handheld UV Transmittance Monitor is ergonomic, lightweight, and simple to use. Obtain incredibly accurate UV Transmittance data on water samples with easy one-button operation.  The UVT-LED-H features high performance LED technology for up to 5x longer lifetime, easy to read backlit LCD to instantly display measurements, and integrated rechargeable Nickel Cadmium battery, all in one of the most compact packages of any UV Transmittance sensor available.
    • Stable measurements driven by high-performance UV-C LED technology
    • Ergonomic, lightweight and portable
    • No warm up time, no disposable cuvettes, and no replacement lamps
    • Take up to 350 measurements on a single battery charge
    • Quick and easy calibration with DI water
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  • differential ORP sensor
    Our SD7000 differential ORP sensor offers unsurpassed ORP measurement accuracy by minimizing reference junction fouling and eliminating ground loops. The SD7000 series delivers greater reliability and less required maintenance than a conventional combination ORP sensor. Extended sensor lifetime can be achieved by replacing the sensor reference (salt bridge). Reliably measures ORP in environments with rapid temperature changes with built-in quick response automatic temperature compensation (ATC).
    • Reliable measurement performance: True differential ORP measurement technology using solution ground
    • Direct-fit Compatibility: Replacement sensor for several popular Hach® & Water Analytics® models
    • Perfect for pressurized applications: Sealed, no maintenance reference design
    • Built for difficult applications: Constructed of chemically-resistant Ryton Polyphenylene Sulfide (PPS)
    • Two year limited warranty: We stand behind all our products with the Sensorex Guarantee
    * Hach is a registered trademark of Danaher. No affiliation, endorsement or sponsorship is stated or implied.
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  • low cost pH Sensor
    Whether you need to measure pH in your swimming pool, aquarium, or hydroponics garden, you need a probe that will deliver accurate measurements day in and day out. Our pH1000 polycarbonate pH sensor provides reliable, stable readings in a range of environments, from greenhouses to science classrooms. This sensor stands up to the usual wear and tear with its durable polycarbonate body and built-in protection for the pH glass measuring surface. Compatible with all pH meters accepting a BNC connector.
    • Very fast response time
    • No maintenance required
    • Durable construction
    • Instantly ready for use
    • One year limited warranty
     
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  • pool pH sensor
    Maintaining proper pH in a swimming pool is critical to chlorine sanitizing activity. Our pH5000 swimming pool pH sensor is reliable and easy to use - perfect for most swimming pool pH testing applications. The durable polycarbonate body stands up to the usual wear and tear, with built in protection for the measuring pH glass. No maintenance is required to keep the sensor working, with a convenient sealed gel reference design.
    • Very fast response time
    • No maintenance required
    • Durable construction
    • Instantly ready for use
    • One year limited warranty
     
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  • conductivity calibration solution
    Our TDS / Conductivity Calibration Standards are prepared to NIST (National Institute of Standards and Technology) primary solutions standards. Both Mixed Salts and Single Salt solutions are available. A NIST certificate is also available for a nominal charge. Solutions are supplied in quart bottles (946 ml) and are ready for immediate use. Both the TDS and the conductivity values are listed on the label. Shelf life is guaranteed for a year, and each solution is supplied with a MSDS sheet.
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  • ph simulator
    pH and ORP measurement loops can be difficult to troubleshoot unless you have the right tools. Our CAL-C110 simulator mimics the signal of a perfect pH or ORP sensor. No need to throw away good sensors when the issue may be the interconnection cables or pH/ORP instrument. The simulator costs less than most pH or ORP sensors. It can easily pay for itself the very first time you consider disposing of a perfectly good sensor. Allows the user to identify the sensor, cable, meter, preamplifier, or controller as the cause of the problem.
    • An essential tool for troubleshooting pH and ORP systems
    • Compatible with most pH and ORP systems using BNC connectors
    • Simulate high impedance loads
    • Instantly ready for use and includes 9V battery
    • One year limited warranty
     
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  • soil pH sensor
    Looking to measure the pH of soil, meat, or cheese? A standard pH sensor with bulb shaped glass won't effectively pierce the surface of these semi-solids; the pH glass may even crack. That's why we've created the pH2200 spear tip pH sensor, specially designed to penetrate semi-solid surfaces for effective pH measurement. The sensor is assembled with a bio-friendly Ultem® body, making it safe for use in food and soil. Use this durable pH sensor at home or in the field with any pH meter accepting a BNC connector.
    • Instantly ready for use
    • Rugged spear tip measurement surface for piercing semi-solids
    • Bio-friendly Ultem® body for safe measurements in food and soil
    • Long-lasting with built-in protection against protein contamination
    • No refilling or maintenance required
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  • Submersion ORP Sensor

    Now Available with optional MODBUS/RS485 Interface

    Our S8000 series of ORP sensors deliver the most reliable online ORP monitoring in a unique, modular package that minimizes total cost of ownership. Customize to exactly what you need for your application with optional electronic amplifier, 4-20 mA or MODBUS/RS485 module, and custom automatic temperature compensation configurations. Sensors can be changed in a few seconds with no tools or re-wiring required by swapping the S8000CD-ORP Quick Change Replacement Cartridge.
    • Reliable performance in demanding applications
    • Lightning fast sensor changes
    • Perfect for pressurized applications
    • Low total cost of ownership
    • One year limited warranty
    Optional Accessories:
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  • 4-20mA pH Transmitter
    Our TX100 is a fully-featured pH/ORP transmitter for use with pH and ORP sensors. The large display shows pH/ORP value simultaneously with temperature. Versatile mounting options for wall, panel, DIN rail or pipe mount.
    • Reliable pH/ORP monitoring
    • Simple sensor calibration
    • Automatic sensor maintenance alerts
    • Compatible with a wide variety of Sensorex pH/ORP sensors
    • One year limited warranty
    Note: Transmitter is only compatible with sensors with tinned leads.
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  • TX105
    Our TX105 is a fully-featured pH/ORP transmitter for use with pH and ORP sensors. The large display shows pH/ORP value simultaneously with temperature. Versatile mounting options for panel, DIN rail or pipe mount.
    • Reliable pH/ORP monitoring
    • Simple sensor calibration
    • Automatic sensor maintenance alerts
    • Compatible with a wide variety of Sensorex pH/ORP sensors
    • One year limited warranty
    Note: Transmitter is only compatible with sensors with tinned leads.
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  • ORP Calibration Solution with Quinhydrone
    The B125 ORP Calibration kit can be used for a simple calibration of both pH and ORP sensors. Use this kit for pH calibration, then convert the pH buffers into stable ORP buffers by saturating with quinhydrone. The B125 ORP calibration kit is a complete, ready-to-use package and can be used for up to 30 calibrations.
    • Simple calibration of pH and ORP simultaneously
    • Fast response time
    • Mix and prepare the calibration buffers in seconds
    • Instantly ready for use and ships with plastic beakers and stirring sticks
    • One year shelf life guaranteed
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  • replacement probe for BNC meter
    When accuracy and repeatability are critical, such as in pharmaceutical or drinking water applications, the ideal electrode will quickly deliver stable measurements. The pH3000 is specially designed to respond quickly and accurately to rapid temperature changes. The high sensitivity internals also make these sensors the best choice for low ionic samples. The double junction reference design prevents contamination, allowing pH testing in samples containing heavy metals, proteins and enzymes, or TRIS buffer.
    • High sensitivity internals for temperature responsive measurements
    • Refillable reference for maximum measurement repeatability
    • Double junction design prevents reference contamination
    • Durable Ultem® body
    • Reinforced meter and cable connections
    • Removable pH glass guard
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  • reliable combination pH electrode
    In laboratory environments such as medical, biological, and materials science research groups, samples and test conditions are constantly changing, but accuracy is always critical. The pH3400 is a highly versatile combination pH electrode, specially designed to respond quickly and accurately to rapid temperature changes. The high sensitivity internals allow testing of low ionic samples. Safely measure samples containing heavy metals, TRIS buffer, or proteins thanks to the double junction reference design, which prevents fouling. Even test highly reactive chemicals: with a glass body, the pH3400 is inert to a wide range of chemical reactions.
    • High accuracy, temperature responsive measurements (pH 0-14)
    • Chemically inert glass body
    • Double junction reference prevents contamination
    • Refillable pump junction helps users easily extend sensor lifetime
    • Reinforced meter connection allows use in wet and corrosive environments
       
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  • sealed pH probe
    In research studies or development applications where heat, moisture, or chemical contaminants may damage equipment, electrode durability is key. The S3010CD is durable inside and out. All the functional components – the pH glass, the meter connection, and the cable connection – are reinforced with protective elements. A double junction reference prevents contamination by heavy metals, proteins, TRIS buffer, and other contaminants.
    • Our most accurate and sensitive laboratory electrode
    • Extensive chemical compatibility
    • Double junction design prevents reference contamination
    • Reinforced meter and cable connections with removable pH glass guard
    • Low maintenance sealed gel reference design
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  • ORP transmitter
    Our TX2000 is an intelligent transmitter/controller for reading pH and ORP sensors and programmable process control. The large LCD display shows pH/ORP value simultaneously with temperature. Compatible with all Sensorex combination-style pH and ORP sensors. Versatile mounting options for panel or wall mounting.
    • Reliable pH/ORP monitoring and process control
    • Simple sensor calibration
    • High-accuracy measurements
    • Compatible with all Sensorex combination-style pH/ORP sensors
    • One year limited warranty
    Note: Transmitter is only compatible with sensors with tinned leads.
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  • strantrol orp
    Our S420 series of ORP sensors deliver reliable online ORP (REDOX) monitoring as a direct-fit replacement for Strantrol* W2T3067 or W2T3068. Extended sensor lifetime is achieved through a large electrolyte reservoir. Durable CPVC construction with built-in protection for the pH measuring surface. Booted BNC connector included with optional cable lengths. Compatible with all ORP meters accepting a BNC connector.
    • Reliable measurement performance
    • Direct-fit Compatibility
    • Perfect for pressurized applications
    • Instantly ready for use
    • One year limited warranty
      * Strantrol is a registered trademark of Evoqua Water Technologies LLC. No affiliation, endorsement or sponsorship is stated or implied.
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  • Strantrol pH Sensor
    Our S420 series of pH sensors deliver reliable online pH monitoring as a direct-fit replacement for Strantrol* W2T4677 or W2T4675. Extended sensor lifetime is achieved through a large electrolyte reservoir. Durable CPVC construction with built-in protection for the pH measuring surface. Booted BNC connector included with optional cable lengths. Compatible with all pH meters accepting a BNC connector.
    • Reliable measurement performance
    • Direct-fit Compatibility
    • Perfect for pressurized applications
    • Instantly ready for use
    • One year limited warranty
      * Strantrol is a registered trademark of Evoqua Water Technologies LLC. No affiliation, endorsement or sponsorship is stated or implied.
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  • ORP sensor for measuring reduction potential of water
    The ORP1000 is a durable and easy to use ORP sensor. Great for outdoor applications, such as monitoring swimming pool chlorine, this probe has built in protection for the ORP sensor surface. Use the ORP1000 with any ORP meter accepting a BNC connector.
    • Very fast response time
    • Sealed, no maintenance reference design
    • Durable construction
    • Instantly ready for use
    • One year limited warranty
     
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  • online process ph sensor

    Now Available with optional 4-20mA or MODBUS/RS485 Interface

    Our S272 series of pH sensors deliver reliable online pH monitoring for in-line or submersion installation configuration. Extended sensor lifetime with double-junction technology. Minimal maintenance required due to flat glass measurement surface. A versatile sensor for moderate and multi-purpose applications.
    • Reliable performance in demanding applications
    • Extended sensor lifetime
    • Optional 4-20mA or MODBUS/RS485 output
    • Input Voltage Options:
      • 12V DC – MODBUS only
      • 24V DC – 4-20mA & MODBUS
    • Versatile design for submersion or in-line mounting
    • One year limited warranty
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  • online process ph sensor
    Our S272 series of pH sensors deliver reliable online pH monitoring for in-line or submersion installation configuration. Extended sensor lifetime with double-junction technology. Minimal maintenance required due to flat glass measurement surface. A versatile sensor for moderate and multi-purpose applications.
    • Reliable performance in demanding applications
    • Extended sensor lifetime
    • Versatile design for submersion or in-line mounting
    • One year limited warranty
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  • acu-trol ph sensor
    Our S465 series of pH and ORP sensors deliver reliable online pH monitoring as a direct-fit replacement for Acu-Trol* 744000260 (AKpH-FB) pH sensor. Extended sensor lifetime is achieved through a large electrolyte reservoir. Durable PPS construction with built-in protection for the pH measuring surface. BNR connector. Designed for use with Acu-Trol® controllers AK110, AK600, AK2100.
    • Reliable measurement performance
    • Direct-fit Compatibility
    • Perfect for pressurized applications
    • Instantly ready for use
    • One year limited warranty
      * Acu-Trol is a registered trademark of Pentair. No affiliation, endorsement or sponsorship is stated or implied.
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  • The UVT-LED-SW Online UV Transmittance Sensor provides reliable UVT measurements for UV disinfection optimization. Ideal for continuous monitoring of open channel wastewater UV disinfection, the UVT-LED-SW features an LED light source that lasts up to 5x longer than traditional mercury lamps. Our patented automatic cleaning and calibration system reduces fouling and drift, so technicians don't have to waste time servicing the units daily. Available with inline or submersion installation kits (see "What's Included" below). Perfect for first time installs or retrofits of existing UV disinfection monitoring systems.
    • Reliable continuous monitoring with patented automatic cleaning & calibration
    • Stable measurements driven by high-performance UV-C LED technology
    • Direct 4-20mA output (no transmitter or controller required)
    • Inline OR submersion installation available
    • Free factory scheduled maintenance for the first year
    Request a Quote  
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  • conductivity controller cooling tower
    Our CX2000 is a fully-featured conductivity controller and 4-20mA transmitter for reading contacting conductivity sensors and programming process control. Set points are easily selected for 2 relay outputs and 1 wash control. Sensor calibration is simple with preset standards. The large LCD display features auto-sense back-light technology for use in all environments, including cooling tower controller applications.
    • Reliable process control
    • Lightning fast sensor calibration
    • Perfect for use in all environments
    • Compatible with a wide variety of sensors
    • One year limited warranty
    Note: Transmitter is only compatible with sensors with tinned leads and either 30k NTC or Pt1000Ω RTD temperature compensation.
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  • pH electrode
    Our S222 series of pH sensors are flexible for light-duty in-line or submersion online pH monitoring and control applications. Replace sensors in seconds with the quick disconnect BNC design. The kit includes S222CD pH electrode and S653 Cable Assembly. S653 cable assembly comes equipped with 1/2" NPT threads for easy submersion installation. For in-line use, install with a 3/4" mounting gland (Sensorex FC75P; sold separately).
    • Reliable performance in light-duty applications: Recessed bulb design ensures reliable performance
    • Lightning fast sensor changes: Modular design allows replacement cartridges to be changed in seconds without tools
    • Perfect for pressurized applications: Sealed, no maintenance reference design
    • Low total cost of ownership: All mounting hardware is reuseable. Only replace the quick-change sensor cartridge
    • One year limited warranty: We stand behind all our products with the Sensorex Guarantee
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  • Light Duty pH Sensor
    Our S222 series of pH sensors are flexible for light-duty in-line or submersion online pH monitoring and control applications. Replace sensors in seconds with the quick disconnect BNC design. For use with the S653 series cable assembly, which comes equipped with 1/2" NPT threads for easy submersion installation. For in-line use, install with a 3/4" mounting gland (Sensorex FC75P; sold separately). For complete kit, purchase S222CD Light-Duty Online Process pH Sensor Kit.
    • Reliable performance in light-duty applications
    • Lightning fast sensor changes with simple quick disconnect BNC design
    • Perfect for pressurized applications
    • All mounting hardware is reuseable. Only replace the quick-change sensor cartridge
    • One year limited warranty
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  • Reduce Maintenance Time and Increase Process Visibility
    • Communicates directly via 4-20 mA or Modbus Output
    • Configuration and calibration done with free web-based software
    Resistant to Corrosion, Coating, and Fouling
    • Noryl body has a wide solvent tolerance temperature and stability
    • Installed both in-line and submersion applications
    Wide Measurement Range
    • Measures up to 2,000,000 uS
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  • acu-trol orp sensor for pentair controller
    Our S465 series of ORP sensors deliver reliable online ORP (REDOX) monitoring as a direct-fit replacement for Acu-Trol* 744000330 (AKORP-FB) platinum or 744000390 (AKORG-FB) gold ORP sensors. Extended sensor lifetime is achieved through a large electrolyte reservoir. Durable PPS construction with built-in protection for the pH measuring surface. Booted BNC connector included with optional cable lengths. Designed for use with Acu-Trol® controllers AK110, AK600, AK2100.
    • Reliable measurement performance
    • Direct-fit Compatibility
    • Perfect for pressurized applications
    • Instantly ready for use
    • One year limited warranty
      * Acu-Trol is a registered trademark of Pentair. No affiliation, endorsement or sponsorship is stated or implied.
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  • Ideal for Heavy Duty Applications
    • Made from 316 Stainless Steel and PEEK
    • Robust single body design
    Multiple cell constants. temperature/pressure ratings and insertion lengths
    • 2 options for cell constants: 0.1/cm and 1.0/cm
    • 3 options of increasing temperature and pressure ratings
    • 2 options for insertion lengths: standard and extended
    Ultra-high temperature version ideal for boiler applications
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  • free chlorine sensor
    Chlorine exists in different chemical forms in solution, including free chlorine (hypochlorite ion and hypochlorous acid) and combined chlorine. Free chlorine is the only form that can perform disinfection, so knowing free chlorine concentration is critical for applications like water and wastewater treatment. FCL free chlorine sensors from Sensorex provide a direct measurement of free chlorine in parts per million (ppm). Using field tested amperometric technology, our FCL sensors perform continuous monitoring without any additional reagents. With a direct 4-20mA output, the FCL sensors can be used with any instrument accepting a 4-20mA input or connected directly to a PLC or SCADA.
    • Direct free chlorine measurement in parts per million (ppm)
    • No reagents requried
    • Direct 4-20mA output
    Recommended accessories:
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  • reliable redox sensor
    When measuring ORP in samples such as wastewaster that may contain proteins, heavy metals, or other contaminants, it is important to use a REDOX sensor designed to withstand unpredictable chemical environments. The ORP2000 features double junction reference protection, which prevents contamination by sample components that interact with silver (Ag). The durable Ultem® body ensures extensive chemical compatibility for safely testing unknown sample types.
    • Ultem® body construction and recessed protected glass
    • Double junction reference protection
    • Sealed gel-filled design to minimize maintenance
    • Reinforced meter connection for protection in wet or corrosive environments
    • One year limited warranty
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  • ORP electrode
    In harsh laboratory or field conditions, where heat, moisture, or corrosive chemicals may damage equipment, ORP electrode durability is key. The ORP3000 is durable inside and out. All the functional components – the ORP measurement surface, the meter connection, and the cable connection – are reinforced with protective elements. Durable Ultem® body construction provides extensive chemical compatibility and withstands temperatures up to 100°C.
    • Durable Ultem® body
    • Double junction reference protection
    • Reinforced meter and cable connections
    • Low maintenance sealed gel reference
    • One year limited warranty
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  • inline pH probe

    Now Available with optional MODBUS/RS485 Interface

    The S8200-ORP is a self-cleaning ORP sensor that delivers the most reliable online monitoring in a unique, modular package that minimizes total cost of ownership. Customize to exactly what you need for your application with optional electronic amplifier, 4-20 mA or MODBUS/RS485 module, and custom automatic temperature compensation configurations. Sensors can be changed in a few seconds with no tools or re-wiring required by swapping the S8000CD-ORP Quick Change Replacement Cartridge.
    • Reliable performance in demanding applications
    • Lightning fast sensor changes
    • Perfect for pressurized applications
    • Low total cost of ownership
    • One year limited warranty
    Optional Accessories:
    Select options Details
  • electrodeless conductivity measurement package
    The SensoPRO Toroidal Conductivity Monitoring System delivers reliable conductivity monitoring with toroidal (inductive) sensor technology. The NEW EX2000RS toroidal conductivity transmitter has one 4-20 mA output, an RS-485 serial interface for use with Modbus RTU or ASCII, and can display conductivity, percent concentration, TDS, and salinity. The durable Noryl-body TCS3020 Toroidal (Inductive) Conductivity / TDS Sensor is resistant to fouling, coating, and corrosion and requires virtually no maintenance.
    • Most reliable conductivity / TDS monitoring
    • Minimal sensor maintenance requirements
    • Displays conductivity, TDS, % concentration, and salinity
    • Robust integration with Modbus RTU or ASCII
    • Sensorex Guarantee: One year limited warranty
    This rugged toroidal conductivity monitoring system is appropriate for harsh applications in Cooling Tower Water Treatment, Brine Concentration Measurement, Wet Scrubbers, and other environments involving high conductivity or high levels of dissolved solids. Click here to watch a video demo of the EX2000RS setup menu.
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  • Toroidal Conductivity Transmitter Without Display
    Our TCSMA online toroidal conductivity transmitter without display is built for water treatment monitoring and aggressive process chemical applications. Ideally suited for applications in which 4-20mA signals are required and reliable performance is critical. The unit features isolated outputs with user-programmable temperature compensation. Durable construction with enclosure rated at NEMA 4X (IP65). Simple installation for wall, pipe, panel, or rail mounting. Use with TCS3020 Toroidal Conductivity Sensor for online conductivity monitoring with minimal maintenance.
    • Reliable process monitoring: Monitor conductivity using proven inductive measurement technology
    • Simple system integration: Loop-powered (16-35V DC) with isolated 4-20mA output signal
    • Perfect for use in all environments: LCD display with NEMA 4X, IP65 enclosure
    • For use with toroidal conductivity sensors: Online conductivity measurement with minimal maintenance
    • One year limited warranty: We stand behind all our products with the Sensorex Guarantee
    *Note: If you require local display, choose the SensoPRO Toroidal Conductivity Monitoring System or the TCSTX Toroidal Conductivity Transmitter with Graphical Display.
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  • Ideal for Light Industrial Process Applications
    • Keyed flange ensures proper orientation for best results
    • Temperature compensation ensures optimal performance
    Reduce Maintenance Costs
    • Quick-disconnect cable to allow for cables to remain in place
    • Flat measurement surface resists coating
    • Calibrations are even faster when used with Sensorex Electronic Modules
    Smart Sensor-Capable via Sensorex Electronic Modules (Sold Separately) 
    • Purchase with EM802-EC Module - sold separately
    • Use with S856 Cable (Option FC)
    • USB Converter for Smart Sensors (S857 - sold separately) recommended for calibration and set-up
    For first time installations, select appropriate cable length and purchase FC875/T Flow Cell separately (shown under accessories).
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  • ORP probe for measuring ORP online
    Moderately contaminated water, such as industrial source water or natural water resources, may contain chemicals and debris that damage ORP probe components. Continuous monitoring in these types of applications requires a durable and low maintenance ORP probe. Our S272 series of ORP probes feature a double junction design to protect the reference cell from contamination by sample components that interact with silver. The flat measurement surface is self-cleaning and resists breakage, for minimal maintenance.
    • Reliable performance in demanding applications
    • Extended sensor lifetime
    • Versatile design for submersion or in-line mounting
    • One year limited warranty
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  • Toroidal conductivity meter
    Our TCSTX online toroidal conductivity meter and 4-20mA transmitter is built for water treatment monitoring in aggressive chemical and coating applications. The unit features isolated outputs with user-programmable temperature compensation. Durable construction with enclosure rated at NEMA 4X (IP65). Simple installation for wall, pipe, panel, or rail mounting. Use with our TCS3020 Toroidal Conductivity Sensor for online conductivity monitoring with minimal maintenance.
    • Reliable process monitoring
    • Simple system integration
    • Perfect for use in all environments
    • For use with toroidal conductivity sensors
    • One year limited warranty
    Note: Transmitter is only compatible with sensors with tinned leads.
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  • hot tap
    Users installing into large tanks, large process lines and scrubber lines will appreciate this hot tap assembly sensor kit. Adjustable insertion depth up to 12” ensures sensor is in flow for best results. Designed in CPVC for a user friendly cost compared to expensive stainless models, the S675 assembly is well suited for most water and wastewater treatment applications. Incorporates optional automatic temperature compensation (ATC) with 1000Ω RTD. Supplied with 10 foot cable. Kit also includes (1) S656CD Flat Surface pH Cartridge. The BV-1 Ball Valve (sold separately) facilitates removal from system without need for shutdown.
    • Durable CPVC design is suitable for most applications
    • Remove sensors for cleaning and maintenance without system shutdown
    • Easy installation
    • One year limited warranty
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  • differential sensor refill solution
    Chemical processing, industrial water and wastewater applications can be challenging environments for a pH sensor. Chemicals from the process mix with the reference electrolyte solution, changing the chemistry and leading to erratic readings. Fortunately, our differential pH and ORP sensors feature buffered reference electrolyte (SDS-7050), which can be replaced or refilled when needed. Also compatible with other brands, including Hach* and Water Analytics*. Contains 500mL.
    • Internal fill solution for SD7000, SD7420, and SD7500 sensors
    • Compatible with popular Hach & Water Analytics 5-wire differential pH & ORP models
    • We stand behind all our products with the Sensorex Guarantee and one year warranty
    *Hach is a registered trademark of Danaher. Water Analytics is a registered trademark of Water Analytics. No affiliation, endorsement or sponsorship is stated or implied.
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  • Conductivity Probe Sensor
    Used for Laboratory and Light Industrial Applications: Cell constants are made from graphite to provide good performance for the value. Configurable to Meet Your Exact Needs: 
    • Select from our options below for a quick delivery or fill out the contact us form at the bottom for a custom product!
    • Choose your cell constant, temperature compensation, cable lengths, and connectors
    Multiple Use Cases
    • Submerge in a tank or mount in-line in a pipe.
    • Compatible with Sensorex's CM1000 and most portable/bench-top meters
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  • conductivity transmitter
    Our CX100 is an isolated output 4-20mA industrial transmitter for reading contacting conductivity sensors. Easily power the unit with available two-wire power supply loop. Ideal for connecting to a PLC for advanced control systems. Versatile mounting options for wall or panel mount.
    • Facilitates easy sensor maintenance with output 'HOLD' function
    • Accurate conductivity / TDS measurements
    • Flexible configurations with 6 selectable conductivity ranges
    • Compatible with a wide variety of contacting conductivity sensors
    • One year limited warranty
    Note: Transmitter is only compatible with sensors with tinned leads and Pt100 RTD temperature compensation. Consider our new CX105 as a great alternative to the CX100.
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  • Replacement ORP Sensor
    Our S8000 series of ORP deliver the most reliable online ORP monitoring in a unique, modular package that minimizes total cost of ownership. These sensor cartridges can be changed in a few seconds with no tools or re-wiring required. Extended sensor lifetime with ERP Reference System.
    • Reliable performance in demanding applications
    • Lightning fast sensor changes with no tools required
    • Extended sensor lifetime
    • All mounting hardware is reuseable. Only replace the quick-change sensor cartridge
    • One year limited warranty
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  • hot tap ph sensor
    Users installing into large tanks, large process lines and scrubber lines will appreciate this flat surface self cleaning pH sensor for use with our S675 hot tap (aka wet tap or insertion) assembly. The sensor features flat surface, self-cleaning pH glass for extended maintenance cycles. Protective feet protect against breakage against ball valve or side walls. A unique feature of this sensor is mounting orientation. It can be mounted in any direction whereas most pH sensor should be mounted 5 degrees above the horizontal plane. With the quick disconnect BNC, sensors can be changed in seconds should replacement be required. Designed for use with our S675 Assembly and a BV-1 Ball Valve for a complete hot tap pH measurement solution.
    • Reliable CPVC construction
    • Remove sensors for cleaning and maintenance without system shutdown
    • Extended sensor lifetime with double junction reference protection
    • Mount in any orientation for ease of accessibility
    • One year limited warranty
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  • Hot Tap Insertion
    Users installing into large tanks, large process lines and scrubber lines will appreciate this hot tap assembly to simplify installation. Adjustable insertion depth up to 12” ensures sensor is in flow for best results. Designed in CPVC for a user friendly cost compared to expensive stainless models, the S675 assembly is well suited for most water and wastewater treatment applications. Incorporates optional automatic temperature compensation (ATC) with 1000Ω RTD. Supplied with 10 foot cable. Designed for use with our S656CD Flat Surface pH Cartridge and BV-1 Ball Valve to facilitate removal from system without need for shutdown.
    • Durable CPVC design is suitable for most applications
    • Remove sensors for cleaning and maintenance without system shutdown
    • Easy installation
    • One year limited warranty
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  • orp calibration solution
    Use this pre-mixed ORP calibration solution for verifying and calibrating ORP sensors.The solution standard is 228mV and is widely used for ORP sensor calibration. Supplied in a pint (16oz) bottle with long term stability.
    • Simple calibration of ORP sensors to known standard
    • Fast response time with all ORP sensors
    • No mixing required - solution is pre-mixed and instantly ready for use
    • One year shelf life guaranteed
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  • differential sensor salt bridge
    When chemicals from challenging applications get inside the sensor reference, chemical reactions can create insoluble salts. These salts clog the reference junction and interrupt the electrical circuit, leading to drifting measurements. Fortunately, our differential pH and ORP sensors can be maintained with the SDS replaceable reference junctions (salt bridges). Simply remove the old salt bridge and insert a new one to restore normal performance to a clogged sensor.
    • Replaceable reference junction for extending the lifetime of SD7000, SD7420, SD7500 sensors
    • Direct-fit compatibility for several popular Hach & Water Analytics models
    • One year limited warranty with the Sensorex Guarantee
    *Hach is a registered trademark of Danaher. Water Analytics is a registered trademark of Water Analytics. No affiliation, endorsement or sponsorship is stated or implied.
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  • water flow regulator
    Our FM001 Flow Regulator allows for simple flow control, and is recommended for use with the FCL Series Free Chlorine Sensors and CLD Series Chlorine Dioxide Sensors when integrated with the FC72 Flow Cell. Provides precision flow control from 0.1 to 1.0 gpm (0.5 to 4.0 l/min) with 94% accuracy (full-scale range).
    • Facilitates high-accuracy measurements of free chlorine and/or chlorine dioxide
    • Precision flow controlfrom 0.1 to 1.0 gpm
    • Simple installation
    • One year limited warranty
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  • Dissolved Oxygen Sensor

    Now Available with optional MODBUS/RS485 Interface

    Our DO6400 series of galvanic dissolved oxygen sensors deliver accurate measurements with very fast response time. Calibration is simple and only requires a single-point air calibration. Sensor directly outputs Millivolt, 4-20mA analog or MODBUS/RS485 digital signal scaled to the sensor range for easy PLC integration.
    • Fast response time for accurate dissolved oxygen monitoring
    • Direct MilliVolt, 4-20mA analog or MODBUS/RS485 digital output signal to integrate with a PLC or other control system
    • Input Voltage Options:
      • 12V DC – MODBUS only
      • 24V DC – 4-20mA & MODBUS
    • Ready for long-term deployment with large electrolyte reservoir
    • One year limited warranty
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  • optical dissolved oxygen sensor

    Now Available with MODBUS/RS485 Interface & optional Titanium body

    The Lumin-S optical dissolved oxygen sensor delivers reliable DO measurements over a long operating life. There are no membranes to replace, no electrolyte solutions to replenish, and no anodes to clean. Maintaining the sensor is as easy as replacing the optical sensing cap once every 1-2 years, and since all calibration data is stored on the cap, there’s no need to calibrate. This dissolved oxygen sensor outputs a Modbus/RS-485 digital signal for easy PLC integration.
    • Reliable measurements: Optical sensor technology delivers accurate DO monitoring with no drift and no minimum flow
    • Long operating life with minimal maintenance: No membranes, electrolyte solutions, or anodes - just replace the cap once every 1-2 years
    • No calibration: All calibration data is stored on the cap for quick and easy startup
    • Simple system integration: Use Modbus/RS-485 to integrate with a PLC or other control system
    • One year limited warranty: We stand behind all our products with the Sensorex Guarantee
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  • pH Sensor Mounting Gland (3/4")
    Our FC75P Mounting Gland are an easy and economical means for mounting pH sensors for in-line applications.  Compatible with all 12mm electrodes, including S222CD Light-Duty Online Process pH Sensor. For Flow Tee See FC75c
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