Analog and digital sensors

For measuring pH, ORP, conductivity, and oxygen in process applications, we offer a variety of analog and digital Memosens sensors that were developed and optimized in close collaboration with users. Knick sensors require little maintenance and provide highly precise measurements with a robust design and long-lasting materials for the chemical, pharmaceutical, and food industries, as well as in the areas of energy and the environment.

The digital measurement is performed using Memosens technology, which enables preventative diagnostics for sensor health and offers many advantages.

Memosens Sensors – The Advantages at a Glance

Plug & measure – sensor replacement in a matter of seconds with pre-calibrated sensors
Easy and safe plugging thanks to its bayonet coupling
Contactless, digital data transmission
All critical data are available in the sensor
Longer sensor service life
Error-free measurements even under the most adverse conditions
Only one cable system for all sensors
The measurements are not affected by excessive cable lengths

SE559 pH Sensor | Memosens | 120 mm | Ex | For water and analytical chemistry

Product number:

SE559X/1-NMSN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE558 pH Sensor | VP | 120 mm | Ex | For ultrapure water, water and analytical chemistry

Product number:

SE558X/1-NVPN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE571 pH Sensor | Memosens | 120 mm | Ex | For demanding applications in the chemical industry

Product number:

SE571X/1-NMSN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE558 pH Sensor | VP | 225 mm | Ex | For ultrapure water, water and analytical chemistry

Product number:

SE558X/2-NVPN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE554 pH Sensor | VP | 120 mm | Ex | For very high ionic strength media

Product number:

SE554X/1-NVPN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE547N pH Sensor | Memosens | 120 mm | CIP/SIP capable and autoclavable

Product number:

SE547N/1-NMSN-A2

Measuring Range: 0 … 14 (limited lifetime with concurrently high pH value and high temperature)

Process Connection: PG 13.5

Product number:

SE555X/2-NMSN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

Product number:

SE555X/2-AMSN

Measuring Range: 0 … 14 pH, ± 1500 mV

SE555 pH Sensor | VP | 120 mm | Ex | Sterilizable | For aggressive media

Product number:

SE555X/1-NVPN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE560 pH Sensor | VP | 120 mm | For low-conductivity media and low temperatures

Product number:

SE560

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

Product number:

SE555X/1-AMSN

Measuring Range: 0 … 14 pH, ± 1500 mV

Process Connection: PG 13.5

Product number:

SE555X/1-NMSN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

Product number:

SE655X-GEFTT0AM

Measuring Range: 0 ... 2,000 mS/cm

Process Connection: G 3/4" (36-mm nut and FKM (Viton) gasket included in shipment)

SE655 Toroidal Conductivity Sensor | Fixed cable | PEEK | High chemical resistance

Product number:

SE655

Measuring Range: 0 ... 2,000 mS/cm

Process Connection: G 3/4" (36-mm nut and FKM (Viton) gasket included in shipment)

SE615 Conductivity Sensor | 2 Graphite electrodes | Memosens | 120 mm | For water and wastewater treatment

Product number:

SE615/1-MS

Measuring Range: 10 µS/cm … 20 mS/cm

Process Connection: PG 13.5

SE554 pH Sensor | Memosens | 225 mm | Ex | For very high ionic strength media

Product number:

SE554X/2-NMSN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE706 Oxygen Sensor | Memosens | 120 mm | Ex | Measuring range (resolution) 0 ... 50 mg/l (6 μg/l)

Product number:

SE706X/1-NMSN

Measuring Range: pO₂ < 1200 mbar

SE604 2-Electrode Conductivity Sensor | Memosens | Ex | Measuring range from ultrapure water to 500 μS/cm

Product number:

SE604X-MS

Electrode Material: Stainless steel 1.4571

Measuring Range: 0.001 … 500 µS/cm

Process Connection: G 1“ thread

MemoSuite Advanced Sensor Management Tool | Calibration function, diagnostics and database documentation

Product number:

SW-MS1400-A

SE680 Digital Toroidal Conductivity Sensor | Varivent DN 50 | FDA-approved PEEK | Measuring range 0 … 2000 mS/cm

Product number:

SE680N-V1N4U00M

Measuring Range: 0 … 2000 µS/cm

Process Connection: Varivent DN50

SE564 ORP Sensor | Memosens | 120 mm | Ex | For highly contaminated media with pressure fluctuations

Product number:

SE564X/1-NMSN

Measuring Range: ± 1500 mV

Process Connection: PG 13.5

SE740 Optical Oxygen Sensor | M12 (8 pins) | 325 mm | For demanding hygienic environments

Product number:

SE740/3

Measuring Range: DO: 4 ppb … 25 ppm, pO₂: 0.1 ... 600 mbar

Process Connection: PG 13.5

SE680 Digital Toroidal Conductivity Sensor | For ARD 75 | Ex | FDA-approved PEEK | Measuring range 0 … 2000 mS/cm

Product number:

SE680X-KUN4U00M

Measuring Range: 0 … 2000 µS/cm

Process Connection: for ARD 75

SE605H 2-Electrode Conductivity Sensor | Memosens | Ingold socket | Hygienic design

Product number:

SE605H-NMSH

Measuring Range: 0 … 1000 µS/cm

Process Connection: Ingold socket

SE680 Digital Toroidal Conductivity Sensor | Dairy pipe DN 50 | FDA-approved PEEK | Measuring range 0 … 2000 mS/cm

Product number:

SE680N-C1N4U00M

Measuring Range: 0 … 2000 µS/cm

Process Connection: Dairy pipe DN50

SE630 Conductivity Sensor | 2 Graphite electrodes | Memosens | NPT 1 | Measurement of conductivities up to 20 mS/cm

Product number:

SE630N-N1MSYB0M

Electrode Material: special graphite

Measuring Range: 10 µS/cm … 20 mS/cm

Process Connection: NPT 1"

SE656 Toroidal Conductivity Sensor | Memosens | Fixed cable | PFA | Resistant to highly oxidizing media

Product number:

SE656N -GEFTW0KM

Measuring Range: 0 ... 2,000 mS/cm

Process Connection: G 3/4“ (nut A/F 36 and FFKM (Chemraz) gasket included in package contents)

SE680 Digital Toroidal Conductivity Sensor | Dairy pipe DN 50 | Ex | FDA-approved PEEK | Measuring range 0 … 2000 mS/cm

Product number:

SE680X-C1N4U00M

Measuring Range: 0 … 2000 µS/cm

Process Connection: Dairy pipe DN50

SE670 Toroidal Conductivity Sensor | Coupling nut G 1 1/2“ | PP | Insensitive to contamination and corrosion

Product number:

SE670/U1

Measuring Range: 0.02 … 2000 mS/cm

Process Connection: Coupling nut G 1½″

SE554 pH Sensor | Memosens | 325 mm | Ex | For very high ionic strength media

Product number:

SE554X/3-NMSN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE740 Optical Oxygen Sensor | M12 (8 pins) | 425 mm | For demanding hygienic environments

Product number:

SE740/4

Measuring Range: DO: 4 ppb … 25 ppm, pO₂: 0.1 ... 600 mbar

Process Connection: PG 13.5

SE554 pH Sensor | Memosens | 120 mm | Ex | For very high ionic strength media

Product number:

SE554X/1-NMSN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE706 Oxygen Sensor | VP | 220 mm | Measuring range (resolution) 0 ... 50 mg/l (6 μg/l)

Product number:

SE706/2

Measuring Range: pO₂ < 1200 mbar

Process Connection: PG 13.5

SE625 2-Electrode Conductivity Sensor | Memosens | Measuring range 0 … 1,000 μS/cm

Product number:

SE625-MS

Measuring Range: 0 … 1000 µS/cm

Process Connection: NPT 3/4"

SE655 Toroidal Conductivity Sensor | Memosens | 3 m Fixed cable | PEEK | High chemical resistance

Product number:

SE655N-GEFFT0AM

Measuring Range: 0 ... 2,000 mS/cm

Process Connection: G 3/4" (36-mm nut and FKM (Viton) gasket included in shipment)

Product number:

SE557X/1-NMSH

Measuring Range: 0 … 14 pH

Product number:

SE555X/1-NMSN-LABS

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE655 Toroidal Conductivity Sensor | Memosens | 7 m Fixed cable | PEEK | High chemical resistance

Product number:

SE655N-GEFTT0AM

Measuring Range: 0 ... 2,000 mS/cm

Process Connection: G 3/4" (36-mm nut and FKM (Viton) gasket included in shipment)

SE565 ORP Sensor | Memosens | 225 mm | Ex | For hygienic processes and sterile applications

Product number:

SE565X/2-NMSN

Measuring Range: ± 1500 mV

Process Connection: PG 13.5

SE555 pH Sensor | VP | 325 mm | Ex | Sterilizable | For aggressive media

Product number:

SE555X/3-NVPN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE707 Oxygen Sensor | VP | 120 mm | Measuring range (resolution) 0 ... 50 mg/l (1 μg/l)

Product number:

SE707/1

Measuring Range: pO₂ < 1200 mbar

MemoSuite Basic Sensor Management Tool | Calibration function

Product number:

SW-MS1400-B

SE706 Oxygen Sensor | VP | 120 mm | Measuring range (resolution) 0 ... 50 mg/l (6 μg/l)

Product number:

SE706/1

Measuring Range: pO₂ < 1200 mbar

Process Connection: PG 13.5

SE558 pH Sensor | Memosens | 120 mm | Ex | For ultrapure water, water and analytical chemistry

Product number:

SE558X/1-NMSN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE554 pH Sensor | Memosens | 425 mm | Ex | For very high ionic strength media

Product number:

SE554X/4-NMSN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE558 pH Sensor | Memosens | 225 mm | Ex | For ultrapure water, water and analytical chemistry

Product number:

SE558X/2-NMSN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE680 Digital Toroidal Conductivity Sensor | Clamp 2" | Ex | FDA-approved PEEK | Measuring range 0 … 2000 mS/cm

Product number:

SE680X-J2N4U00M

Measuring Range: 0 … 2000 µS/cm

Process Connection: Clamp 2"

SE600 4-Electrode Conductivity Sensor | Fixed cable | For high pressure/high-temperature

Product number:

SE600

Measuring Range: approx. 0.5 µS/cm … 600 mS/cm

Process Connection: 1“ weld nipple

SE740 Optical Oxygen Sensor | M12 (8 pins) | 215 mm | For demanding hygienic environments

Product number:

SE740/2

Measuring Range: DO: 4 ppb … 25 ppm, pO₂: 0.1 ... 600 mbar

Process Connection: PG 13.5

SE655 Toroidal Conductivity Sensor | Fixed cable | Ex | PEEK | High chemical resistance

Product number:

SE655X

Measuring Range: 0.002 … 2000 mS/cm, 0 ... 2,000 mS/cm

Process Connection: G 3/4" (36-mm nut and FKM (Viton) gasket included in shipment)

SE740 Optical Oxygen Sensor | M12 (8 pins) | 120 mm | For demanding hygienic environments

Product number:

SE740/1

Measuring Range: DO: 4 ppb … 25 ppm, pO₂: 0.1 ... 600 mbar

Process Connection: PG 13.5

SE604 2-Electrode Conductivity Sensor | 7-Pole | Measuring range from 1 nS/cm to 1000 μS/cm

Product number:

SE604

Electrode Material: Stainless steel 1.4571

Process Connection: G 1“ thread

SE554 pH Sensor | VP | 325 mm | Ex | For very high ionic strength media

Product number:

SE554X/3-NVPN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE660 Electrodeless Conductivity Sensor

Product number:

SE660/11

Measuring Range: 0 ... 2,000 mS/cm

Process Connection: PP coupling nut G 1½″

SE680 Digital Toroidal Conductivity Sensor | Varivent DN 50 | Ex | FDA-approved PEEK | Measuring range 0 … 2000 mS/cm

Product number:

SE680X-V1N4U00M

Measuring Range: 0 … 2000 µS/cm

Process Connection: Varivent DN50

SE680 Digital Toroidal Conductivity Sensor | For ARD 75 | FDA-approved PEEK | Measuring range 0 … 2000 mS/cm

Product number:

SE680N-KUN4U00M

Measuring Range: 0 … 2000 µS/cm

Process Connection: for ARD 75

SE554 pH/ORP Sensor | Memosens | 225 mm | Ex | For very high ionic strength media

Product number:

SE554X/2-AMSN

Measuring Range: 0 … 14 pH, ± 1500 mV

Process Connection: PG 13.5

SE707 Oxygen Sensor | Memosens | 120 mm | Ex | Measuring range (resolution) 0 ... 50 mg/l (1 μg/l)

Product number:

SE707X/1-NMSN

Measuring Range: pO₂ < 1200 mbar

SE565 ORP Sensor | Memosens | 120 mm | Ex | For hygienic processes and sterile applications

Product number:

SE565X/1-NMSN

Measuring Range: ± 1500 mV

Process Connection: PG 13.5

SE707 Oxygen Sensor | Memosens | 220 mm | Ex | Measuring range (resolution) 0 ... 50 mg/l (1 μg/l)

Product number:

SE707X/2-NMSN

Measuring Range: pO₂ < 1200 mbar

SE555 pH Sensor | VP | 425 mm | Ex | Sterilizable | For aggressive media

Product number:

SE555X/4-NVPN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE554 pH Sensor | VP | 225 mm | Ex | For very high ionic strength media

Product number:

SE554X/2-NVPN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE620 2-Electrode Conductivity Sensor | VP | Pharma compliant hygienic design

Product number:

SE620/1

Electrode Material: Stainless steel 1.4435

Measuring Range: 0.001 … 50 mS/cm

Process Connection: Clamp DN 25

SE715 Oxygen Sensor | Memosens | 120 mm | For water and wastewater treatment

Product number:

SE715/1-MS

Measuring Range: 0 ... 20 mg/l

Process Connection: PG 13.5

SE571 pH Sensor | Memosens | 225 mm | Ex | For demanding applications in the chemical industry

Product number:

SE571X/2-NMSN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE680 Digital Toroidal Conductivity Sensor | Clamp 2" | FDA-approved PEEK | Measuring range 0 … 2000 mS/cm

Product number:

SE680N-J2N4U00M

Measuring Range: 0 … 2000 µS/cm

Process Connection: Clamp 2"

SE554 pH/ORP Sensor | Memosens | 120 mm | Ex | For very high ionic strength media

Product number:

SE554X/1-AMSN

Measuring Range: 0 … 14 pH, ± 1500 mV

Process Connection: PG 13.5

SE680 Digital Toroidal Conductivity Sensor | SMS 2" | FDA-approved PEEK | Measuring range 0 … 2000 mS/cm

Product number:

SE680N-M2N4U00M

Measuring Range: 0 … 2000 µS/cm

Process Connection: SMS 2"

SE503 pH Sensor | VP | 120 mm | Polysulfone Body | For water and wastewater treatment

Product number:

SE503N/1-NVPN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE604 2-Electrode Conductivity Sensor | Memosens | Measuring range from ultrapure water to 500 μS/cm

Product number:

SE604-MS

Electrode Material: Stainless steel 1.4571

Measuring Range: 0.001 … 500 µS/cm

Process Connection: G 1“ thread

SE515 pH Sensor | Memosens | 120 mm | Sigma glass | For water and wastewater treatment

Product number:

SE515/1-MS

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE603 4-Electrode Conductivity Sensor | Fixed cable | Very high corrosion resistance

Product number:

SE603

Electrode Material: Platinum

Measuring Range: approx. 0.5 µS/cm … 600 mS/cm

Process Connection: Special flange

SE610 2-Electrode Conductivity Sensor | Fixed cable | For measuring low conductivities in water

Product number:

SE610

Electrode Material: Stainless steel 1.4571

Measuring Range: 0.1 … 1000 µS/cm

Process Connection: G 1/2" thread

Product number:

SE555X/2-NS8N

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

Product number:

SE555X/4-NMSN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE680 Digital Toroidal Conductivity Sensor | SMS 2" | Ex | FDA-approved PEEK | Measuring range 0 … 2000 mS/cm

Product number:

SE680X-M2N4U00M

Measuring Range: 0 … 2000 µS/cm

Process Connection: SMS 2"

Product number:

SE571X/1-NMSN-LABS

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE706 Oxygen Sensor | Memosens | 220 mm | Ex | Measuring range (resolution) 0 ... 50 mg/l (6 μg/l)

Product number:

SE706X/2-NMSN

Measuring Range: pO₂ < 1200 mbar

SE555 pH Sensor | VP | 225 mm | Ex | Sterilizable | For aggressive media

Product number:

SE555X/2-NVPN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE680 Digital Toroidal Conductivity Sensor | For ARF 210/215 | Ex | FDA-approved PEEK | Measuring range 0 … 2000 mS/cm

Product number:

SE680X-K8N4U00M

Measuring Range: 0 … 2000 µS/cm

Process Connection: for ARF 210/215

SE554 pH Sensor | VP | 425 mm | Ex | For very high ionic strength media

Product number:

SE554X/4-NVPN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE559 pH Sensor | Memosens | 225 mm | Ex | For water and analytical chemistry

Product number:

SE559X/2-NMSN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

SE656 Toroidal Conductivity Sensor | Fixed cable | Ex | PFA | Resistant to highly oxidizing media

Product number:

SE656X

Measuring Range: 0.002 … 2000 mS/cm

Process Connection: G 3/4“ (nut A/F 36 and FFKM (Chemraz) gasket included in package contents)

SE656 Toroidal Conductivity Sensor | Fixed cable | PFA | Resistant to highly oxidizing media

Product number:

SE656

Measuring Range: 0.002 … 2000 mS/cm

Process Connection: G 3/4“ (nut A/F 36 and FFKM (Chemraz) gasket included in package contents)

Product number:

SE555X/3-NMSN

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

Product number:

SE656X -GEFTW0KM

Measuring Range: 0 ... 2,000 mS/cm

Process Connection: G 3/4“ (nut A/F 36 and FFKM (Chemraz) gasket included in package contents)

SE707 Oxygen Sensor | Memosens | 320 mm | Ex | Measuring range (resolution) 0 ... 50 mg/l (1 μg/l)

Product number:

SE707X/3-NMSN

Measuring Range: pO₂ < 1200 mbar

SE547N pH Sensor | Memosens | 225 mm | CIP/SIP capable and autoclavable

Product number:

SE547N/2-NMSN-A2

Measuring Range: 0 … 14 (limited lifetime with concurrently high pH value and high temperature)

Process Connection: PG 13.5

SE615 Conductivity Sensor | 2 Graphite electrodes | Memosens | 225 mm | For water and wastewater treatment

Product number:

SE615/2-MS

Measuring Range: 10 µS/cm … 20 mS/cm

Process Connection: PG 13.5

SE680 Digital Toroidal Conductivity Sensor | For ARF 210/215 | FDA-approved PEEK | Measuring range 0 … 2000 mS/cm

Product number:

SE680N-K8N4U00M

Measuring Range: 0 … 2000 µS/cm

Process Connection: for ARF 210/215

Product number:

SE555X/1-NS8N

Measuring Range: 0 … 14 pH

Process Connection: PG 13.5

Analog and digital sensors

Memosens Sensors – The Advantages at a Glance

Filter