Hengesbach Inductive conductivity / concentration transmitter INDUTEC


The instrument is used for the measurement/control of conductivity or concentration in liquid media. It is particularly recommended for use in media where severe deposits of dirt, oil, grease or gypsum/lime precipitates are to be expected. The integrated temperature measurement enables fast and accurate temperature compensation, which is of particular importance when measuring conductivity. Additional functions, such as the combined changeover of measurement range and temperature coefficient, and a particularly robust conductivity probe, enable optimum application in CIP processes.

Two built-in switching outputs can be freely programmed to monitor limits for conductivity/concentration and/or temperature. It is also possible to assign alarm and control functions (dilution).

Typical areas of application: Food/beverage and pharmaceutical industries, product separation in the beverage industry, breweries and dairies, bottle cleaning plant, concentration control in electroplating and chemical processing plant, CIP systems, water and wastewater engineering, dosing of chemicals, leakage indication, in heating and cooling plant, and so on.


  • hygienic sensor
  • activation of up to four measuring ranges and temperature coefficients
  • concentration measurement of caustic soda naoh and nitric acid HNO3
  • fast-response temperature sensor- linear, natural water or specific characteristic


General details

Device type/measuring principleINDUTEC K / inductive 

Input / accuracy

Measuring rangesAccuracy (as % of the measuring range span) 
  • 0...500µS/cm
≤ 1 % 
  • 0...1000µS/cm
≤ 1 % 
  • 0...2000µS/cm
  • 0...10mS/cm
  • 0...50mS/cm
  • 0...100mS/cm
  • 0...200mS/cm
  • 0...500mS/cm
  • 0...1000mS/cm
≤ 1 % 
  • 0...2000mS/cm
≤ 1 % 
Ambient temperature effect≤ 0,1%/K 
Concentration measurementimplemented in the device software 
  • NaOH
0...15% by weight or 25...50% by weight (0...90°C) 
  • HNO3
0...25% by weight or 36...82% by weight (0...80°C) 


Output signal4...20mA or 20...4mA 
Burden≤ 500Ω 
Analog output at “alarm”- low 0mA / 3.4mA or fixed value 
 - high 22mA or fixed value 

Conditions of use

Medium temperature-10°C ... +120°C (140°C sterilization) 
Ambient / storage temperature5...+50°C/ -10...+75°C; max. rel. humidity. 93 %, no condensation 
Protection class acc. to EN60529IP 67 
Electromagnetic compatibilityclass B, acc.to EN 61326 

Temperature compensation

Reference temperature15...30°C, adjustable 
Temperature coefficient5,5%/°C, adjustable 
Compensation range-20...150°C 


Electrical connection- Standard:  M16x1.5 cable screw connection, nickel-plated brass (stainless steel available on request) 
 - Optional:  M12x1 round plug-in connector, nickel-plated brass (stainless steel available on request) 
Materials- Field housing:CrNiSt 1.4305 (303)
 - Sensor:PEEK
Pressuremax. 10bar 

Display and operation

DisplayMultiple-colour status LED 
Operation2-key concept 

Auxiliary energy resources

Power supply / burden19...31V DC 

Download Data Sheet: Inductive conductivity concentration transmitter INDUTEC

Ref: Hengesbach.com