pH Products & Information
Popular ProductsSensorex pH Best Sellers
S8300 – Modular pH Sensors for In-line
In heavily contaminated wastewater or chemical processing applications, an inline pH probe typically wears out fast. Constantly replacing an inline pH…
Complete Modular Submersion/Inline* pH Smart Sensors
Sensorex 8000 series Smart Sensors can be configured in countless variations to meet our exact needs. This is one of…
S272CD – Process pH Sensor
The S272CD online process pH sensor delivers reliable online monitoring for in-line or submersion installation configuration. This sensor is designed…
TX2000 – Intelligent pH & ORP Transmitter/Controller
Our TX2000 is an intelligent pH and ORP transmitter/controller for reading pH and ORP sensors and programmable process controls. The large…
S175CD/BNC – pH Sensor, Spear Tip
Looking to measure the pH of substrate, soil, meat, or cheese? A standard pH sensor with bulb shaped glass won't…
SG354/SG355 Glass-Body Flat Surface pH and ORP Electrodes
SG354/SG355 sensors feature a special high molarity reference design for stability, reliability and maximum service life in demanding pool and…
S200CD/BNC – pH Sensor, Laboratory and General Use, Extended Life
Applications such as environmental and wastewater sampling involve some uncertainty about what samples may contain. When dealing with unknown or…
S200CD/10/BNC – Process pH Sensor, Light Duty
The S200CD/10/BNC is a light duty pH probe for continuous monitoring of surface water and ground water, including environmental and…
WHAT IS IT?
About pH
pH, commonly used for water measurements, is a measure of acidity and alkalinity, or the caustic and base present in a given solution. It is generally expressed with a numeric scale ranging from 0-14. The value 7 represents neutrality. The numbers on the scale increase with increasing alkalinity, while the numbers on the scale decrease with increasing acidity.
Each unit of change represents a tenfold change in acidity or alkalinity. The pH value is also equal to the negative logarithm of the hydrogen-ion concentration or hydrogen-ion activity. pH values for some common solutions are listed in the table to the right.
pH sensors are essential instruments used across various industries and research fields to measure the acidity or alkalinity of solutions. These sensors employ different technologies, such as glass electrodes and reference electrodes, to detect the concentration of hydrogen ions in a solution, which determines its pH value. Whether in laboratory settings or industrial processes, pH sensors enable precise monitoring and control, ensuring product quality, environmental safety, and regulatory compliance. With their ability to provide real-time data and withstand challenging conditions, pH sensors play a critical role in numerous applications, from chemical manufacturing and water treatment to food production and environmental monitoring.
About Combination pH Sensors
The most common method of measuring pH is to use an electrochemical pH sensor. Combination pH sensors are a type of electrochemical pH sensor that feature both a measuring electrode and a reference electrode. The measuring electrode detects changes in the pH value while the reference provides a stable signal for comparison.
A high impedance device, known as a pH meter, is used to display the millivolt signal in pH units. Combination pH sensor technology can be used to build different products, including laboratory pH sensors and industrial or process pH sensors.
Differential pH Sensors
Compared with a typical combination pH probe, differential pH sensors work slightly differently. While combination pH sensors have 2 electrodes, a measuring and a reference electrode, differential pH sensors have 3 electrodes. In the differential design, 2 electrodes measure pH differentially with respect to a third metal ground electrode. This design has the advantage of preventing reference fouling, making it ideal for industrial applications like wet scrubbers.
Preparing chemical solutions?
Visit our pH calculator first.
How Are pH Measurements Used?
pH measurements are widely used to control processes, ensure product quality and safety.
Custom pH Sensor Design and Manufacturing
In addition to our standard products, Sensorex designs and manufactures pH sensors for over 250 OEM partners. Whether you are looking to private label sensors and instrumentation or incorporate pH sensors as part of the design for your water treatment product, our team of engineers and application specialists can help you meet your goals. We provide custom branding on our standard products and can design custom pH sensors to meet various design specifications.
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Shop NowMore from Sensorex
In addition to pH sensors we have a full range of water quality sensors.
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