- Galvanic (electrochemical) measurement principle
- Replaceable membrane cap and fill solution
- 12mm durable epoxy body
- For benchtop, portable, or inline use
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Our DO1200 galvanic dissolved oxygen sensors measure the oxygen content of water using an electrochemical measurement principle. Built in an economical but durable 12mm epoxy body, these sensors are suitable for portable or benchtop use. The DO1200 can also be installed inline for continuous monitoring applications by upgrading to a PTFE membrane cap. The sensor is compatible with our FC75P 3/4 inch in-line fitting for mounting into 3/4 inch FNPT threaded tees. -
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Sensorex pH buffer solutions are used for calibration of pH sensors. pH buffer kit contains 3 color coded pH buffer values of (red) 4.01. (Yellow) 7.00 and (blue) 10.00. Order as a 3-pack or individual bottles. -
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 -
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. -
Refillable glass pH electrodes contain liquid electrolyte solution, which serves to close the electrical circuit in a pH electrode. The electrolyte solution must have electrical contact with the solution being measured. Contact is made via a semipermeable junction, which permits a consistent outflow of liquid electrolyte. Over time, electrolyte is depleted and should be replaced. -
Extend the life of your pH and ORP sensors by using the Sensorex pH electrode storage solution. When the sensor is not in use, place the sensor glass measurement area into the storage solution. The pH electrode storage solutions are supplied in pints (473 ml). -
Our FC75C Flow Cell Kit is 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. To only purchase the gland, please purchase the FC75P -
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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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
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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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The FC875/T Threaded 3/4″ CPVC Flow Cell is used for in-line installation of the S8000CD Self-Cleaning Industrial pH Sensor or S8000CD-ORP Self-Cleaning Industrial ORP Sensor. The FC875/T is part of a complete S8000 package and can be purchased separately, or it is already included in our S8000 Kits listed below: -
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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The 855 is a shielded, low-noise cable assembly for our S8000 series pH and ORP sensors. This cable assembly has 3/4" NPT thread for inline or submersion installations. Click this link for our shielded, low-noise cable assembly with automatic temperature compensation ATC (S855). -
Our BV-1 full port 1” ball valve is designed for use with our S675 Series Wet Tap Insertion Assemblies and S656CD pH Sensors. The BV1 mounts a pH sensor in pressurized lines or the sidewall of tanks. Sensors can be retracted for service without shutting down lines or the need to empty tanks. Constructed of durable CPVC.- Remove sensors for cleaning and maintenance without system shutdown
- Full 1" port design is compatible with Sensorex insertion assemblies and sensors
- One year limited warranty
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With threading for submersion mounting, the S653 Cable Assembly is the perfect complement to our S651CD Submersible Electrode series. This cable assembly is designed to submerge the electrode in tanks, flumes and sewer lines. The cost-effective CPVC construction is well suited for most water and wastewater applications. Pairing the S653 Cable Assembly with an S651CD series Electrodes allows for quick electrode changes, drastically reducing downtime due to maintenance.- Use with one of our S651CD series Electrodes for quick and easy maintenance
- Threading design for fast and simple installation
- Durable CPVC design is suitable for most applications
- One year limited warranty
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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
- The 855 is a shielded, low-noise cable assembly for our S8000 series pH and ORP sensors with Automatic Temperature Compensation (ATC). This ATC cable assembly has 3/4" NPT thread for inline or submersion installations. Click this link for our shielded, low-noise cable assembly without temperature compensation (S853).
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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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Applications such as environmental and wastewater sampling involve some uncertainty about what samples may contain. When dealing with unknown or unpredictable sample types, you need an electrode you can trust to deliver accurate measurements regardless of the contaminants you encounter. The SG2000CD has a double junction reference design to prevent reference fouling by heavy metals and other sample contaminants. With a chemically inert glass body, this electrode can be safely used in the widest range of chemical environments.- Accurate measurements across full pH scale (0-14)
- Maximum chemical compatibility
- Low maintenance sealed gel reference
- Compatible with any meter accepting BNC
- Booted BNC protects meter connection
- One year limited warranty
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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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Applications such as environmental and wastewater sampling involve some uncertainty about what samples may contain. When dealing with unknown or unpredictable sample types, you need a pH probe you can trust to deliver accurate measurements regardless of the contaminants you encounter. The pH2000 (formerly S200CD) has a double junction reference design to prevent reference fouling by heavy metals and other sample contaminants. When you travel to remote sites to collect data, it is especially important that obtaining the measurements you need is hassle free. The pH2000 features an Ultem® body and a booted meter connection for durability you can trust in the field.- Durable Ultem® body
- Booted BNC protects meter connection
- Low maintenance sealed gel reference design
- Double junction prevents reference cell contamination
- 1 year limited warranty
Click here to download specification sheet.
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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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The pH6000 is a light duty option for continuous monitoring of surface water and ground water, including environmental and industrial source water monitoring. The durable Ultem® body permits use in the field, while conferring chemical compatibility. Double junction reference protection allows use in environments that contain reference fouling contaminants, including heavy metals. Fully integrated cable comes in a 10 foot (3 meter) standard length, with custom cables available by request.- Durable Ultem® body
- Booted BNC protects meter connection
- Low maintenance sealed gel reference design
- Double junction prevents reference cell contamination
- 1 year limited warranty
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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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Whether you are a student measuring pH in a lab or a business owner monitoring plant or crop health, you need a pH electrode that will consistently deliver accurate measurements. If you deal with a wide variety of chemicals or any aggressive substances, a glass probe like our pH1400 (formerly SG201C) is a safe choice due to the chemically inert properties of glass. This basic, single junction electrode has a refillable reference cell, allowing users to maintain measurement precision throughout the sensor lifetime.- Accurate measurements across full pH scale (0-14)
- Glass body withstands harsh chemicals
- Refillable reference for extended working lifetime
- Use with any meter accepting BNC
- One year limited warranty
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Environmental, wastewater, and other sampling applications may expose electrodes to unknown contaminants. Over time, exposure to contaminants such as heavy metals and reactive chemicals, will take a toll on a sensor's functional components. The best sensors for these types of applications are built to safely handle contaminants to maximize working lifetime. Our pH2400 has a double junction reference design to prevent fouling by sample contaminants that interact with Silver (Ag). The refillable reference junction allows users to replace the liquid fill solution as it becomes depleted or contaminated, instead of replacing the whole sensor.- Accurate measurements across full pH scale (0-14)
- Glass electrode body provides maximum chemical compatability
- Double junction design prevents reference contamination
- Refillable reference junction allows sensor maintenance, saving replacement costs
- BNC boot protects meter connection
- One year limited warranty
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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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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
- 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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Now Available with optional MODBUS/RS485 Interface
For S8000 Modular pH, ORP and Contacting Conductivity applications which require more than a direct electrode output, plug-in electronic modules are available. Simply select the parameter type and desired amplifier/output.- Input Voltage Options:
- 12V DC - MODBUS only
- 24V DC - 4-20mA & MODBUS
- Input Voltage Options:
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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
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Sensor cartridge housing for use with S8000 series pH and ORP electrodes. Available with integrated automatic temperature compensation and solution ground. Reduce operating costs of pH sensors by using the modular S8000 platform - only the sensor cartridge must be replaced. For use in submersion or in-line installations.- Modular design lowers overall pH sensor cost
- Easy installation
- Solution ground available for eliminating measurement errors caused by reference ground potentials
- Compatible with all Sensorex S8000 Series pH and ORP sensor cartridges
- One year limited warranty
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Ideal for Laboratory or Light Industrial Process Applications- Submersible in tank or mounted inline
- Made of rugged epoxy body
- Select from three cell constants based on your measurement range
- Use temperature compensation for best performance
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Agar plates, skin, and electrophoresis gels are all surfaces that may be difficult to measure with a typical glass bulb electrode due to concerns about bulb breakage. To facilitate these and other surface measurements, we created the pH2100 flat tip pH electrode. It has a rugged flat measurement surface, which breaks less easily when it comes in contact with hard materials. This makes it a great choice for measuring slurries, sludges, and viscous samples as well as those containing suspended solids.- Flat measurement tip for surface measurements and slurries
- Double junction electrode design prevents reference contamination
- Durable Ultem® body
- Booted BNC protects meter connection
- One year limited warranty
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Surfaces like paper, leather, electrophoresis gels and agar plates may be difficult to measure with traditional pH glass bulbs due to concerns about breakage. A flat electrode like our pH2500, is ideally suited for these types of pH measurements as well as measurements of suspended sludges and slurries. In addition to its specially designed measurement surface, the pH2500 features double junction construction, which prevents contamination and allows testing of samples containing heavy metals or proteins.- Flat electrode measurement surface
- Double junction reference protection
- Reinforced meter connection
- Low maintenance sealed gel reference design
- Compatible with any meter accepting BNC
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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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Keep your chlorine dioxide amperometric sensors running for extended lifetime and improved accuracy using this chlorine dioxide maintenance kit. Compatible with CLD Series Chlorine Dioxide Amperometric Sensors. This kit includes:- (1) replacement membrane cap
- (1) replacement pressure relief band
- (2) 30mL bottles of electrolyte refill solution
- (2) 10mL syringes
- (3) polishing squares
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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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Ideal for Light Industrial Process Applications- Keyed flange ensures proper orientation for best results
- Temperature compensation ensures optimal performance
- 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
- 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
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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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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
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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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Keep your free chlorine amperometric sensors running for extended lifetime and improved accuracy using this free chlorine maintenance kit. Compatible with FCL Series Free Chlorine Amperometric Sensors. This kit includes:- (1) replacement membrane cap
- (1) replacement pressure relief band
- (2) 30mL bottles of electrolyte refill solution
- (2) 10mL syringes
- (3) polishing squares
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This submersible pH electrode is ideal for tanks, flumes and sewer lines. The self-cleaning, flat-surface design makes the S651CD resistant to coating, increasing time between maintenance cycles. Based on our popular S650CD, the S651CD features protective feet to guard the pH glass against breakage. Double junction reference protection extends the lifetime of the sensor. Should a replacement sensor be required, the electrode is equipped with quick disconnect BNC connections to minimize downtime due to electrode maintenance. Designed for use with our S653 Cable Assembly for a complete Submersible Flat-Surface, Self-Cleaning pH measurement solution.- Flat surface design resists coating
- Double junction reference protection extends sensor lifetime
- Use with our S653 Cable Assembly for quick and easy maintenance
- Reliable CPVC construction
- One year limited warranty
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Our S8000 series of pH deliver the most reliable online pH 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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Now Available with optional MODBUS/RS485 Interface
The EM802-EC is our most cost-effective solution for connecting our S8000 series Contacting Conductivity sensors to a PLC or SCADA system. This small electronic module functions as a blind transmitter with a 4-20mA or MODBUS/RS485 output. No additional instrumentation is required to condition the sensor signal to be read by your PLC or SCADA. It can also be used to pair Sensorex sensors with any controller that has a 4-20mA or RS485 input card. Easily connects to our CS8300TC Modular Contacting Conductivity Sensor Package to form a complete monitoring solution.- Blind 4-20mA or MODBUS/RS485 transmitter for connecting conductivity sensors to PLC or SCADA
- Small form factor saves valuable panel space
- Input Voltage Options:
- 12V DC - MODBUS only
- 24V DC - 4-20mA & MODBUS
- Compatible with CS8300 conductivity sensor
- Compatible with PT1000 RTD temperature compensation
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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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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
- Our S651CD-HF submersible pH electrode is ideal for acidic environments that utilize hydrofluoric acid (HF). The self-cleaning, flat-surface design makes the this electrode resistant to coating, increasing time between maintenance cycles. Protective feet guard the pH glass against breakage, and double junction reference protection extends the lifetime of the sensor. Should a replacement sensor be required, the S651CD-HF is equipped with quick disconnect BNC connections to minimize downtime due to electrode maintenance. Designed for use with our S653 Cable Assembly for the S651CD for a complete Submersible Flat-Surface, Self-Cleaning pH measurement solution, even in acidic HF conditions.
- HF resistant pH glass for extended lifetime in harsh conditions
- Flat surface design resists coating
- Double junction reference protection extends sensor lifetime
- Use with our S653 Cable Assembly for quick and easy maintenance
- Reliable CPVC construction
- One year limited warranty