Robust, low-maintenance pH sensors you can rely on

From glass to non-glass, hygienic to rugged, our Memosens pH sensors provide stable, accurate measurements across all industries, with fewer calibrations and longer life.

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Temperature Range:
Temperature Range: - slider
-22 °F 410 °F
Ex Approvals
CIP/SIP Capable
Non-Glass
Conductivity Range
Refillable Electrolyte
S120 CPVC Static Holder for pH ORP Conductivity and Dissolved Oxygen Sensors

S120

CPVC Static Holder for 120 mm Sensors
Temperature Range: 14…120°F Pressure Range 0…40 psig
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Temperature Range: 14…120°F Pressure Range 0…40 psig
Temperature Range: 14…120°F Pressure Range 0…40 psig
VarioPin Cable for pH, ORP, conductivity and dissolved oxygen sensors

VarioPin Cable

Analog Sensor Cable
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Coiled up Memosens Cable with free ends for transmitter and sensor

Memosens Cable

Digital Sensor Cable
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Knick Calimat Buffer Solutions bottles for pH Calibrations in 2, 4, 7, and 9 pH

CaliMat Buffers

pH Calibration Solution
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Tricamp SE605H Conductivity Sensors

SE605H

Hygienic Coaxial Conductivity Sensor for Low-Conductivity Water
Temp: -4 … 275 °F
Pressure:
Ingold: 0…362 psig; @ –4…158 °F
Tri-Clamp: 0…232 psig; @ -4…230 °F
Range: 0 … 1,000 µS/cm
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Temp: -4 … 275 °F
Pressure:
Ingold: 0…362 psig; @ –4…158 °F
Tri-Clamp: 0…232 psig; @ -4…230 °F
Range: 0 … 1,000 µS/cm
Temp: -4 … 275 °F
Pressure:
Ingold: 0…362 psig; @ –4…158 °F
Tri-Clamp: 0…232 psig; @ -4…230 °F
Range: 0 … 1,000 µS/cm
Uniclean 720 Automated Cleaning System

Uniclean 720/730

Electro-pneumatic Controller for Automatic Cleaning
The Uniclean 720 and 730 is a control boxes for a simple electro-pneumatic cleaning system for pH, ORP, conductivity, and dissolved oxygen sensors.
Temp Range: 14…158 °F
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The Uniclean 720 and 730 is a control boxes for a simple electro-pneumatic cleaning system for pH, ORP, conductivity, and dissolved oxygen sensors.
Temp Range: 14…158 °F
The Uniclean 720 and 730 is a control boxes for a simple electro-pneumatic cleaning system for pH, ORP, conductivity, and dissolved oxygen sensors.
Temp Range: 14…158 °F
CSR 425 1 Inch Ball Valve Retractable holder

CSR 425

1″ Ball Valve Retractable Holder
Temp Range: 23 … 248 °F
Pressure Range: 100 psi at 176 °F 50 psi at 248 °F
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Temp Range: 23 … 248 °F
Pressure Range: 100 psi at 176 °F 50 psi at 248 °F
Temp Range: 23 … 248 °F
Pressure Range: 100 psi at 176 °F 50 psi at 248 °F
ProgaLog 4000

ProgaLog 4000

Transmitter Configuration Software
ProgaLog 4000 is a PC software for offline configuration of Protos 4400 and Stratos Multi Transmitters.
  • Spend less time in the field doing configurations or modifications
  • Easily configure every transmitter the same way
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ProgaLog 4000 is a PC software for offline configuration of Protos 4400 and Stratos Multi Transmitters.
  • Spend less time in the field doing configurations or modifications
  • Easily configure every transmitter the same way
ProgaLog 4000 is a PC software for offline configuration of Protos 4400 and Stratos Multi Transmitters.
  • Spend less time in the field doing configurations or modifications
  • Easily configure every transmitter the same way
K24 4-Electrode Conductivity Sensor

K25

Conductivity Sensor for Heavily Polluted & Fibrous Media
Temp: 32…302 °F
Pressure: Max. 145 psi
Range: 0…1,000 mS/cm
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K25

Temp: 32…302 °F
Pressure: Max. 145 psi
Range: 0…1,000 mS/cm

K25

Temp: 32…302 °F
Pressure: Max. 145 psi
Range: 0…1,000 mS/cm
SE 547 ISFET pH Sensor

SE547

ISFET pH Sensor for Hygienic & Sterile Applications
Temp Range: 5…275°F
Pressure Range: -2.9…145 psig
pH Range: 0…14
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Temp Range: 5…275°F
Pressure Range: -2.9…145 psig
pH Range: 0…14
Temp Range: 5…275°F
Pressure Range: -2.9…145 psig
pH Range: 0…14
WA 111 Plastic Pneumatic Retractable Holder

WA 111

Plastic Pneumatic Retractable Holder
Temp Range: Max. 194°F
Pressure Range: Max. 90 psi
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Temp Range: Max. 194°F
Pressure Range: Max. 90 psi
Temp Range: Max. 194°F
Pressure Range: Max. 90 psi

A pH sensor range that fits your process

Whether you’re monitoring high-purity water or handling aggressive slurries, M4 Knick offers a pH sensor range built to fit your exact process conditions. Our sensors combine durable materials, specialized pH glass formulations, and Memosens digital technology to ensure stable performance in even the most demanding environments.

  • Options for every application: inline, online, and offline
  • Wide chemical compatibility with sensor glass and non-glass options
  • Memosens digital technology for secure signal transmission and simplified calibration

pH Saving Calculator

Calculate your return on investment when using Knick Memosens pH Sensors

ELL: Ready-to-Install pH Loop for Basic Applications

The ELL is a complete, preassembled digital pH measurement system designed for simple water and municipal processes. It includes a reliable Memosens SE515 pH sensor, static holder, and transmitter. The ELL is stocked in the US for quick shipment to keep your operations moving.

  • Simple, plug-and-play setup reduces installation time and labor
  • Transmitter available with or without a display
  • Ideal for general water treatment, utility systems, and basic monitoring tasks

pH Resources

Glass v. ISFET: Where It Matters

Choosing between a glass and an ISFET pH sensor depends largely on the mechanical demands and hygienic requirements of the process.

How Long Should a pH Sensor Last?

Though no sensor lasts forever, operations should not have to replace sensors faster than they can afford.

5 Lesser-Known Impacts on Accuracy

Process variables like temperature, chemical reactions, and seemingly innocuous factors like sensor orientation all contribute to the reliability of a process's accuracy.
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