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Toroidal Conductivity Sensor - SE 656

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- Robust design
- Extremely large measuring range due to inductive measuring principle
- Insensitive to contamination
- No process-wetted electrodes
- Extremely high chemical resistance (PFA)
- Measurement in hazardous locations

Model Number: SE 656
Data Sheet:

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Product Specification

SE 656 Toroidal Conductivity Sensor

Special and precise sensor with high chemical resistance over a very large measuring range, for heavily polluted and strongly oxidizing media

Corrosion-resistant toroidal sensor for measuring pure water up to maximum conductivities. Insensitive to strongly oxidizing media. Smooth, easy-to-clean design.
High accuracy due to electrodeless measurement.
Low risk of contamination because of large sensor opening.
Also suitable for hazardous locations.

SE 656 Toroidal Conductivity Sensor Applications
Conductivity measurement of highly concentrated acid and alkaline solutions, hydro-fluoric acid, nitric acid, concentrated sulfuric acid, oleum, concentrated alkaline solutions, strongly oxidizing media

SE 656 Toroidal Conductivity Sensor Facts
- Robust design
- Extremely large measuring range due to inductive measuring principle
- Insensitive to contamination
- No process-wetted electrodes
- Extremely high chemical resistance (PFA)
- Measurement in hazardous locations

SE 656 Toroidal Conductivity Sensor Specifications

Cell factor	Approx. 2/cm (≥ 30 mm distance to wall)
Measuring range	0.002 to 2000 mS/cm
Accuracy	± (5 µS/cm +0.5 % measured value) at –20 °C … +100 °C ± (10 µS/cm +0.5 % measured value) at >100 °C
Material	Cell:PFA ; Gasket:FFKM (Chemraz)
Temperature detector	Pt 100 (Class A)
Temp. response time t90	Approx. 11 min
Temperature	-20 … +125 °C
Pressure	0 ... 16 bar
Cable	Fixed cable, 5 m
Protection	IP 68 (when mounted)
Assembly	G 3/4" (36-mm nut and FFKM (Chemraz) gasket included in shipment)
ATEX Certificate (SE 656 X)	II 1 G Ex ia IIC T4/T6 Ga