Knick Conductivity Sensors
Knick’s conductivity sensors offer all measuring principles: 2-electrode, 4-electrode, and inductive. The analog and digital conductivity sensors cover a wide range of measurement requirements, from ultra-pure water to highly concentrated acids and alkaline solutions, and they are available with explosion protection.
The sensors are compatible with inline, flow-through, and immersion fittings, guaranteeing versatility in a variety of installation configurations and applications.
MemoSuite Sensor Management Tool
Memosens contactless sensor coupling
Fixed cable | For high pressure/high-temperature
4-electrode sensor for high-pressure and high-temperature applications; large measuring range from pure water up to high conductivities.
- Large measuring range due to 4-electrode technology
- Measurement at high temperatures and pressures
- High level of process safety due to durable materials and robust design
- Slim, ultracompact design (25 mm diameter)
For special chemistry applications up to 210 °C and 25 bar. Universal measuring range from pure water to 600 mS/cm.
With fixed cable and integrated temperature detector. Process-wetted materials: stainless steel and PTFE; very compact design.
Specifications
| Measurement Parameter: | Conductivity |
| Measuring Range: | Approx. 0.5 µS/cm … 600 mS/cm |
| Process Connection: | 1" weld-in socket |
| Temperature: | 0 … 210 °C |
| Temperature Detector: | Pt1000 (IEC Class A) |
| Pressure: | max. 25 bar |
| Material: | Body: PTFE / stainless steel AISI 316 L / Electrodes: stainless steel AISI 316 L |
| Cable: | Fixed cable, 5 m |
Measuring range from 1 nS/cm to 1000 μS/cm
Robust 2-electrode sensor, for precise and reliable measurement of low and very low conductivities, particularly in ultrapure water
- Coaxially arranged electrodes
- Independent of installation conditions
- Integrated temperature detector
- High level of process safety due to durable materials and robust design
- Easy to clean thanks to detachable outer electrode
- Particularly suitable for monitoring ultrapure water in power plants
- Large measuring range from 1 nS/cm to 1,000 μS/cm
- Calibration Certificate
Robust, coaxially arranged electrodes made of stainless steel. Large measuring range from ultrapure water to 1000 μS/cm with only one sensor model (cell constant).
Integrated temperature detector for exact temperature compensation. Easy to clean thanks to replaceable outer electrode.
Applications
Boiler feed water, feed water, boiler water, cooling water, water vapor cycle, pure water, condenser monitoring
Specifications
| Measurement Parameter: | Conductivity |
| Connector: | 7--pin |
| Explosion protection: | No |
| Process Connection: | Thread G1" |
| Temperature Detector: | Pt1000 class A, T90 |
| Measuring principle: | 2 electrodes |
| Pressure: | Max. 25 bar (–30 ... +70 °C) |
| Electrode Material: | Stainless steel 1.4571 |
| Ambient temperature: | –25 … 80 °C |
| Signal Transmission: | analog |
Measuring range from ultrapure water to 500 μS/cm
Robust 2-electrode sensor, for precise and reliable measurement of low and very low conductivities, particularly in ultrapure water, digital, with Memosens technology.
- Perfect galvanic isolation thanks to Memosens technology
- Digital data transfer
- Integrated sensor diagnostics
- Large measuring range from ultrapure water to 500 μS/cm
- Coaxially arranged electrodes
- Independent of installation conditions
- Integrated temperature detector
- High level of process safety due to durable materials and robust design
- Easy to clean thanks to detachable outer electrode
- Particularly suitable for monitoring ultrapure water in power plants
Robust, coaxially arranged electrodes made of stainless steel. Large measuring range from ultrapure water to 500 μS/cm.
Integrated temperature detector for temperature compensation. Easy to clean thanks to replaceable outer electrode.
Applications
Boiler feed water, feed water, boiler water, cooling water, water vapor cycle, pure water, condenser monitoring
Specifications
| Measurement Parameter: | Conductivity |
| Connector: | Memosens |
| Measuring Range: | 0.001 … 500 µS/cm |
| Explosion protection: | No |
| Process Connection: | G 1" |
| Temperature Detector: | NTC 30 kΩ |
| Measuring principle: | 2 electrodes |
| Pressure: | Max. 10 bar (120 °C), Max. 25 bar (–20 … 70 °C) |
| Electrode Material: | Stainless steel 1.4571 |
| Ambient temperature: | –25 … 80 °C |
| Cell constant: | 0.029/cm |
| Signal Transmission: | Memosens |
Ex | Measuring range from ultrapure water to 500 μS/cm
Robust 2-electrode sensor, for precise and reliable measurement of low and very low conductivities, particularly in ultrapure water, digital, with Memosens technology.
- Perfect galvanic isolation thanks to Memosens technology
- Digital data transfer
- Integrated sensor diagnostics
- Large measuring range from ultrapure water to 500 μS/cm
- Coaxially arranged electrodes
- Independent of installation conditions
- Integrated temperature detector
- High level of process safety due to durable materials and robust design
- Easy to clean thanks to detachable outer electrode
- Particularly suitable for monitoring ultrapure water in power plants
Robust, coaxially arranged electrodes made of stainless steel. Large measuring range from ultrapure water to 500 μS/cm.
Integrated temperature detector for temperature compensation. Easy to clean thanks to replaceable outer electrode.
Applications
Boiler feed water, feed water, boiler water, cooling water, water vapor cycle, pure water, condenser monitoring
Specifications
| Measurement Parameter: | Conductivity |
| Connector: | Memosens |
| Measuring Range: | 0.001 … 500 µS/cm |
| Explosion protection: | Yes |
| Process Connection: | G 1" |
| Temperature Detector: | NTC 30 kΩ |
| Measuring principle: | 2 electrodes |
| Pressure: | Max. 10 bar (120 °C), Max. 25 bar (–20 … 70 °C) |
| Electrode Material: | Stainless steel 1.4571 |
| Ambient temperature: | –25 … 80 °C |
| Cell constant: | 0.029/cm |
| Signal Transmission: | Memosens |
Ingold socket | Hygienic design
Robust 2-electrode sensor, for precise and reliable measurement of low and very low conductivities, particularly in ultrapure water, digital, with Memosens technology
- Perfect galvanic isolation thanks to Memosens technology
- Digital data transfer
- Integrated sensor diagnostics
- Large measuring range from ultrapure water to 1000 μS/cm
- Hygienic design
- Electropolished – Roughness Ra ≤ 0.4 or ≤ 0.8 μm
- FDA-certified materials
- Coaxially arranged electrodes
- Independent of installation conditions
- Integrated temperature detector
- High level of process safety due to durable materials and robust design
- Easy to clean thanks to replaceable outer and inner electrode
- Particularly suitable for monitoring ultrapure water in power plants
- Replaceable gaskets
Robust sensor with hygienic design made of stainless steel in coaxial arrangement. Large measuring range from ultrapure water to 1000 μS/cm. Integrated temperature detector for temperature compensation. Easy to clean thanks to replaceable outer and inner electrode.
Applications
Ultrapure water, WFI (water for injection), pharmaceutical and food industry, biotechnology
Specifications
| Measurement Parameter: | Conductivity |
| Connector: | Memosens |
| Measuring Range: | 0 … 1,000 µS/cm |
| Explosion protection: | No |
| Process Connection: | Ingold socket |
| Temperature Detector: | NTC 30 kΩ |
| Pressure: | Max. 10 bar (135 °C), Max. 25 bar (–20 … 70 °C) |
| Wetted materials: | Stainless steel 1.4435; isolator PEEK; seals: see product line |
| Cell constant: | 0.021/cm |
For measuring low conductivities in water
The low-cost solution for measuring low conductivities in water.
- Compact design
- Cost-efficient
- Broad applications
- Robust stainless-steel electrodes
- Integrated temperature detector
- 5 m fixed cable
Compact 2-electrode sensor with coaxial stainless-steel electrodes, integrated temperature detector and fixed cable.
Applications
Drinking water, industrial water, surface water, ion exchangers and reverse osmosis plants, rinse water, seawater desalination plants
Specifications
For water and wastewater treatment
Reasonably priced sensor for water and wastewater treatment applications.
- Perfect galvanic isolation thanks to Memosens technology
- No influence of humidity in the connector
- Precalibration in the lab
- Digital data transfer
- Integrated sensor diagnostics
- low maintenance
- Integrated temperature detector
- 2 graphite electrodes
Large measuring range thanks to electrodes made from low polarized special graphite. Designed for MemoRail applications.
The SE615 conductivity sensor with Memosens connector system has 2 graphite electrodes and requires low maintenance. The integrated temperature detector provides automatic temperature compensation during calibration and operation of the sensor. The sensor is designed for simultaneous measurement of conductivity and temperature in industrial processes.
Applications
Water/wastewater treatment.
Specifications
| Measurement Parameter: | Conductivity |
| Connector: | Memosens |
| Measuring Range: | 10 µS/cm … 20 mS/cm |
| Length: | 120 mm |
| Process Connection: | PG 13.5 |
| Temperature: | –5 … 80 °C ( 23 ... 176 °F) |
| Temperature Detector: | NTC 30 kΩ |
| Body Material: | Polysulfone |
| Measuring principle: | 2 electrodes |
| Pressure: | Max. 4 bar |
| Membrane material: | Graphite |
| Signal Transmission: | Memosens |
2 Graphite electrodes | For water and wastewater treatment
Reasonably priced sensor for water and wastewater treatment applications.
- Perfect galvanic isolation thanks to Memosens technology
- No influence of humidity in the connector
- Precalibration in the lab
- Digital data transfer
- Integrated sensor diagnostics
- low maintenance
- Integrated temperature detector
- 2 graphite electrodes
Large measuring range thanks to electrodes made from low polarized special graphite. Designed for MemoRail applications.
The SE615 conductivity sensor with Memosens connector system has 2 graphite electrodes and requires low maintenance. The integrated temperature detector provides automatic temperature compensation during calibration and operation of the sensor. The sensor is designed for simultaneous measurement of conductivity and temperature in industrial processes.
Applications
Water/wastewater treatment.
Specifications
| Measurement Parameter: | Conductivity |
| Connector: | Memosens |
| Measuring Range: | 10 µS/cm … 20 mS/cm |
| Length: | 225 mm |
| Process Connection: | PG 13.5 |
| Temperature: | –5 … 80 °C ( 23 ... 176 °F) |
| Temperature Detector: | NTC 30 kΩ |
| Body Material: | Polysulfone |
| Measuring principle: | 2 electrodes |
| Pressure: | Max. 4 bar |
| Membrane material: | Graphite |
| Signal Transmission: | Memosens |
Pharma compliant hygienic design
Pharma-compliant 2-electrode sensor in hygienic design.
- Low surface roughness
- Steam-sterilizable
- CIP-capable
- Integrated temperature detector
- Measuring range 0.001 to 50 μS/cm
- Coaxially arranged electrodes
- Independent of installation conditions
- Insulator and sealing materials FDA-listed
- VP screw cap
- PortaSim simulator with VP plug
- Incl. Inspection Certificate 3.1
Conductivity sensor in pharmaceutical design with coaxial electrodes and integrated temperature detector. Low surface roughness of <0.8 µm. The materials are physiologically harmless and meet FDA requirements. Steam-sterilizable. Reliable and easy checking of the measurement using PortaSim simulators according to USP<645>.
Applications
Pure and ultrapure water, water for injection (WFI), food, ion exchangers, reverse osmosis plants, also chip manufacturing
Specifications
| Measurement Parameter: | Conductivity |
| Roughness: | < 0.8 μm |
| Connector: | VP (VarioPin) |
| Measuring Range: | 0 … 50 µS/cm |
| Explosion protection: | No |
| Process Connection: | Clamp DN 25 |
| Temperature: | 0 ... 135 °C (steam-sterilizable) |
| Temperature Detector: | Pt1000 |
| Measuring principle: | 2 electrodes |
| Pressure: | 9 bar (at 60 °C), 16 bar (at 25 °C) |
| Electrode Material: | Stainless steel 1.4435 |
| Signal Transmission: | analog |
| Resolution: | 0,001 µS/cm |