Accurate conductivity measurement with minimal maintenance

From high-purity water to aggressive chemical solutions, M4 Knick conductivity sensors deliver precise, stable measurements across a broad range of conductivities. With robust designs and Memosens digital connectivity, they help extend service life and reduce ongoing maintenance.


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Conductivity 
Sensors 
Ex Approvals
CIP/SIP Capable
SE 615 Conductivity Sensor

SE615

Low Cost Water and Wastewater Conductivity Sensor
Temp: 23…176 °F
Pressure: Max. 58 psig
Range: 10 μS/cm…20 mS/cm
Learn More
Temp: 23…176 °F
Pressure: Max. 58 psig
Range: 10 μS/cm…20 mS/cm
Temp: 23…176 °F
Pressure: Max. 58 psig
Range: 10 μS/cm…20 mS/cm
SE 625 Conductivity Sensor

SE625

Coaxial Conductivity Sensor for Low-Conductivity Water
Temp: 14…248 °F
Pressure: -14.5…232 psig
Range: 0…1,000 µS/cm
Learn More
Temp: 14…248 °F
Pressure: -14.5…232 psig
Range: 0…1,000 µS/cm
Temp: 14…248 °F
Pressure: -14.5…232 psig
Range: 0…1,000 µS/cm
SE 680 Toroidal Conductivity Sensor

SE680

Hygienic Toroidal Conductivity Sensor
Temp: 14…257 °F
Pressure: -1.5…145 psig
Range: 0…2000 mS/cm
Learn More
Temp: 14…257 °F
Pressure: -1.5…145 psig
Range: 0…2000 mS/cm
Temp: 14…257 °F
Pressure: -1.5…145 psig
Range: 0…2000 mS/cm
SE 600 Low Conductivity Sensor

SE600

Conductivity Sensor for High-Temperature Applications
Temp: Max. 410 °F
Pressure: Max. 363 psig
Range: 0.5 µS/cm…600 mS
Learn More
Temp: Max. 410 °F
Pressure: Max. 363 psig
Range: 0.5 µS/cm…600 mS
Temp: Max. 410 °F
Pressure: Max. 363 psig
Range: 0.5 µS/cm…600 mS
SE 603 Conductivity Sensor

SE603

Conductivity Sensor for Corrosive Processes
Temp: Max. 248 °F
Pressure: Max. 174 psig
Range: 0.5 µS/cm…600 mS/cm
Learn More
Temp: Max. 248 °F
Pressure: Max. 174 psig
Range: 0.5 µS/cm…600 mS/cm
Temp: Max. 248 °F
Pressure: Max. 174 psig
Range: 0.5 µS/cm…600 mS/cm
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
Learn More

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 604 Conductivity Sensor

SE604

Coaxial Sensor for Ultrapure Water
Temp: -4…248 °F
Pressure: 362 psi @ -4…158°F; Max. 145 psi @ 248°F
Range: 0.04…500 µS/cm
Learn More
Temp: -4…248 °F
Pressure: 362 psi @ -4…158°F; Max. 145 psi @ 248°F
Range: 0.04…500 µS/cm
Temp: -4…248 °F
Pressure: 362 psi @ -4…158°F; Max. 145 psi @ 248°F
Range: 0.04…500 µS/cm
SE605 Conductivity Sensor

SE605

Coaxial Conductivity Sensor for Low-Conductivity Water
Temp: 14 °F…248 °F
Pressure:
Ingold: -14.5…363 psig; @ –4…158 °F
Tri-Clamp: -14.5…232 psig; @ 14…230 °F
Range: 0.04…1,000 µS/cm
Learn More
Temp: 14 °F…248 °F
Pressure:
Ingold: -14.5…363 psig; @ –4…158 °F
Tri-Clamp: -14.5…232 psig; @ 14…230 °F
Range: 0.04…1,000 µS/cm
Temp: 14 °F…248 °F
Pressure:
Ingold: -14.5…363 psig; @ –4…158 °F
Tri-Clamp: -14.5…232 psig; @ 14…230 °F
Range: 0.04…1,000 µS/cm
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
Learn More
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
SE 610 Conductivity Sensor

SE610

Basic Low-Cost Conductivity Sensor for Water
Temp: 50…194 °F
Pressure: 87 psi @ 77 °F
Range: 0.1…1000 µS/cm
Learn More
Temp: 50…194 °F
Pressure: 87 psi @ 77 °F
Range: 0.1…1000 µS/cm
Temp: 50…194 °F
Pressure: 87 psi @ 77 °F
Range: 0.1…1000 µS/cm
SE 620 Conductivity Sensor

SE620

Hygienic Conductivity Sensor
Temp: 32…275 °F
Pressure: 0…232 psig
Range: 0.05…50 µS/cm
Learn More
Temp: 32…275 °F
Pressure: 0…232 psig
Range: 0.05…50 µS/cm
Temp: 32…275 °F
Pressure: 0…232 psig
Range: 0.05…50 µS/cm
SE 630 Conductivity Sensor

SE630

Corrosion-Resistant Conductivity Sensor
Temp: -4…275 °F
Pressure: 0…232 psig
Range: Analog 10 µS/cm…50 mS/cm
Memosens 0 …20 mS/cm
Learn More
Temp: -4…275 °F
Pressure: 0…232 psig
Range: Analog 10 µS/cm…50 mS/cm
Memosens 0 …20 mS/cm
Temp: -4…275 °F
Pressure: 0…232 psig
Range: Analog 10 µS/cm…50 mS/cm
Memosens 0 …20 mS/cm
SE 655 Toroidal Conductivity Sensors with Memosens

SE655

PEEK Toroidal Conductivity Sensor
Temp: -4…257 °F
Pressure: 0…290 psig
Range: 0…2,000 mS/cm
Learn More
Temp: -4…257 °F
Pressure: 0…290 psig
Range: 0…2,000 mS/cm
Temp: -4…257 °F
Pressure: 0…290 psig
Range: 0…2,000 mS/cm

SE656

Memosens PFA Toroidal Conductivity Sensor
Temp: -4…257 °F
Pressure: 0…232 psig
Range: 0…2,000 mS/cm
Learn More
Temp: -4…257 °F
Pressure: 0…232 psig
Range: 0…2,000 mS/cm
Temp: -4…257 °F
Pressure: 0…232 psig
Range: 0…2,000 mS/cm
SE 670 Toroidal Conductivity Sensor

SE670

Polypropylene Toroidal Conductivity Sensor
Temp: 32…140 °F
Pressure: 0…145 psig
Range: 0…2,000 mS/cm
Learn More
Temp: 32…140 °F
Pressure: 0…145 psig
Range: 0…2,000 mS/cm
Temp: 32…140 °F
Pressure: 0…145 psig
Range: 0…2,000 mS/cm
Conductivity 
Sensors 
SE 615 Conductivity Sensor

SE615

Low Cost Water and Wastewater Conductivity Sensor
Temp: 23…176 °F
Pressure: Max. 58 psig
Range: 10 μS/cm…20 mS/cm
Learn More
Temp: 23…176 °F
Pressure: Max. 58 psig
Range: 10 μS/cm…20 mS/cm
Temp: 23…176 °F
Pressure: Max. 58 psig
Range: 10 μS/cm…20 mS/cm
SE 625 Conductivity Sensor

SE625

Coaxial Conductivity Sensor for Low-Conductivity Water
Temp: 14…248 °F
Pressure: -14.5…232 psig
Range: 0…1,000 µS/cm
Learn More
Temp: 14…248 °F
Pressure: -14.5…232 psig
Range: 0…1,000 µS/cm
Temp: 14…248 °F
Pressure: -14.5…232 psig
Range: 0…1,000 µS/cm
SE 680 Toroidal Conductivity Sensor

SE680

Hygienic Toroidal Conductivity Sensor
Temp: 14…257 °F
Pressure: -1.5…145 psig
Range: 0…2000 mS/cm
Learn More
Temp: 14…257 °F
Pressure: -1.5…145 psig
Range: 0…2000 mS/cm
Temp: 14…257 °F
Pressure: -1.5…145 psig
Range: 0…2000 mS/cm
SE 600 Low Conductivity Sensor

SE600

Conductivity Sensor for High-Temperature Applications
Temp: Max. 410 °F
Pressure: Max. 363 psig
Range: 0.5 µS/cm…600 mS
Learn More
Temp: Max. 410 °F
Pressure: Max. 363 psig
Range: 0.5 µS/cm…600 mS
Temp: Max. 410 °F
Pressure: Max. 363 psig
Range: 0.5 µS/cm…600 mS
SE 603 Conductivity Sensor

SE603

Conductivity Sensor for Corrosive Processes
Temp: Max. 248 °F
Pressure: Max. 174 psig
Range: 0.5 µS/cm…600 mS/cm
Learn More
Temp: Max. 248 °F
Pressure: Max. 174 psig
Range: 0.5 µS/cm…600 mS/cm
Temp: Max. 248 °F
Pressure: Max. 174 psig
Range: 0.5 µS/cm…600 mS/cm
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
Learn More

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 604 Conductivity Sensor

SE604

Coaxial Sensor for Ultrapure Water
Temp: -4…248 °F
Pressure: 362 psi @ -4…158°F; Max. 145 psi @ 248°F
Range: 0.04…500 µS/cm
Learn More
Temp: -4…248 °F
Pressure: 362 psi @ -4…158°F; Max. 145 psi @ 248°F
Range: 0.04…500 µS/cm
Temp: -4…248 °F
Pressure: 362 psi @ -4…158°F; Max. 145 psi @ 248°F
Range: 0.04…500 µS/cm
SE605 Conductivity Sensor

SE605

Coaxial Conductivity Sensor for Low-Conductivity Water
Temp: 14 °F…248 °F
Pressure:
Ingold: -14.5…363 psig; @ –4…158 °F
Tri-Clamp: -14.5…232 psig; @ 14…230 °F
Range: 0.04…1,000 µS/cm
Learn More
Temp: 14 °F…248 °F
Pressure:
Ingold: -14.5…363 psig; @ –4…158 °F
Tri-Clamp: -14.5…232 psig; @ 14…230 °F
Range: 0.04…1,000 µS/cm
Temp: 14 °F…248 °F
Pressure:
Ingold: -14.5…363 psig; @ –4…158 °F
Tri-Clamp: -14.5…232 psig; @ 14…230 °F
Range: 0.04…1,000 µS/cm
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
Learn More
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
SE 610 Conductivity Sensor

SE610

Basic Low-Cost Conductivity Sensor for Water
Temp: 50…194 °F
Pressure: 87 psi @ 77 °F
Range: 0.1…1000 µS/cm
Learn More
Temp: 50…194 °F
Pressure: 87 psi @ 77 °F
Range: 0.1…1000 µS/cm
Temp: 50…194 °F
Pressure: 87 psi @ 77 °F
Range: 0.1…1000 µS/cm
SE 620 Conductivity Sensor

SE620

Hygienic Conductivity Sensor
Temp: 32…275 °F
Pressure: 0…232 psig
Range: 0.05…50 µS/cm
Learn More
Temp: 32…275 °F
Pressure: 0…232 psig
Range: 0.05…50 µS/cm
Temp: 32…275 °F
Pressure: 0…232 psig
Range: 0.05…50 µS/cm
SE 630 Conductivity Sensor

SE630

Corrosion-Resistant Conductivity Sensor
Temp: -4…275 °F
Pressure: 0…232 psig
Range: Analog 10 µS/cm…50 mS/cm
Memosens 0 …20 mS/cm
Learn More
Temp: -4…275 °F
Pressure: 0…232 psig
Range: Analog 10 µS/cm…50 mS/cm
Memosens 0 …20 mS/cm
Temp: -4…275 °F
Pressure: 0…232 psig
Range: Analog 10 µS/cm…50 mS/cm
Memosens 0 …20 mS/cm
SE 655 Toroidal Conductivity Sensors with Memosens

SE655

PEEK Toroidal Conductivity Sensor
Temp: -4…257 °F
Pressure: 0…290 psig
Range: 0…2,000 mS/cm
Learn More
Temp: -4…257 °F
Pressure: 0…290 psig
Range: 0…2,000 mS/cm
Temp: -4…257 °F
Pressure: 0…290 psig
Range: 0…2,000 mS/cm

SE656

Memosens PFA Toroidal Conductivity Sensor
Temp: -4…257 °F
Pressure: 0…232 psig
Range: 0…2,000 mS/cm
Learn More
Temp: -4…257 °F
Pressure: 0…232 psig
Range: 0…2,000 mS/cm
Temp: -4…257 °F
Pressure: 0…232 psig
Range: 0…2,000 mS/cm
SE 670 Toroidal Conductivity Sensor

SE670

Polypropylene Toroidal Conductivity Sensor
Temp: 32…140 °F
Pressure: 0…145 psig
Range: 0…2,000 mS/cm
Learn More
Temp: 32…140 °F
Pressure: 0…145 psig
Range: 0…2,000 mS/cm
Temp: 32…140 °F
Pressure: 0…145 psig
Range: 0…2,000 mS/cm

Conductivity sensors tailored to your process chemistry

M4 Knick conductivity sensors are designed to measure electrolytic conductivity accurately across a wide range of applications, from high-purity water to aggressive chemical solutions. Each sensor is engineered to match the specific demands of your process.

  • Measurement accuracy across broad ranges
  • Memosens technology for stable, interference-free signals
  • Designed for uptime and operational confidence


Not sure which conductivity sensor you need?

Selecting the right conductivity sensor depends on your application, measurement range, and process conditions. Our guide walks through the key differences between contacting and inductive conductivity sensors and explains how to choose the right option for reliable, long-term performance.

Conductivity Resources

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.

Cell Constant: What It Is & Why It Matters

The cell constant is the link between a conductivity sensor’s physical design and its ability to deliver accurate measurements.

Understanding the Relationship Between pH and Conductivity

Though the two parameters do not inherently influence each other, their correlation arises from the influence of free-flowing ions on both.