Pressure and Level Transmitter Keramess KS 050D Series Hengesbach

The KS050D pressure transmitter is suitable for measuring the pressure and filling level in tanks and pipes. Its capacitative measurement cell and ceramic membrane makes the KS050D the ideal candidate for use in applications with abrasive media. KERAMESS pressure transmitters are designed for a measuring range of -1/0…1bar to -1/0…70bar. Special measuring ranges are also available. The 050D series pressure transmitters are equipped with a micro-processor controlled electronics system and an accuracy of ≤ ± 0.2% FS. They are parametrised with a simple and user-friendly operating concept via 2 keys and a multi-colour status LED.

A Turn Down of up to 4 can be set using the full and empty adjustment. The large range of hygienic process connections such as e.g. the VARIVENT®, clamp DIN 32676, conical coupling with DIN 11851 groove union nut etc. guarantee the KS050D a variety of applications in the food industry and all other hygienic applications. A wide variety of process connections are also available for non-hygiene applications. Their use in hygienic applications are assisted by the robust stainless steel field housing in the IP 67 and IP 69K, which withstands extremely aggressive cleaning techniques. The KS050D pressure transmitters are highly-suited to use in applications which strict hygiene standards and basic requirements of functionality and accuracy


  • mechanically robust, dry ceramic measuring cell, suitable for viscous and abrassive media
  • output signal 4...20mA, turndown 4
  • accuracy ≤ ± 0,2% FS
  • simple calibration, even without disconnection of the transmitter, through switchable power supply plant / calibrator supply
  • simple parametering via 2-key concept and multi-colour status-LED
  • with hygienic and standard process connections as a fixed connection
  • for measurement of pressure and filling level in tanks and pipes with basic requirements


General details

Device type/measuring principleKS050D: capacitive       


Measuring ranges     KS050D   
Standard nominal measuring range [bar] Relative OPRelative OPAbsolute OP
  0.05 440 600.1 4
  0.1 470 1050.2 6
OP = overload protection [bar] ±0.1 4-1 to 1 100.4 6
 0.2 6-1 to 2 181 10
Special measuring ranges are available on request. 0.4 6-1 to 4 252 18
 1 10-1 to 10 404 25
 2 18-1 to 20 4010 40
All measurement cells are vacuum safe    
  4 25-1 to 40 6020 40
  10 40-1 to 70 10540 60
  20 40   70 105
Setting the measuring rangesvia the 2 keys within the transmitter     
Setting rangesMeasuring range begin  zero:0 to 75%of the sensor's nominal measuring spanTD=4
 Measuring spanspan:25 to 100%of the sensor's nominal measuring span 
Burst pressure DIN16086>= 4-fold nominal measuring range     


Output signal2-wire:   4 to 20mA with a test circuit connection in the device   
Fault signal22mA       
Current limitation3.8mA and 21mA (normal operation, cannot be set)   

Measuring accuracy

Reference conditionsacc. to DIN IEC 770       
Linearity, hysteresis and repeatability acc. to the limit point method DIN IEC 770≤ ± 0.2% of the sensor nominal measuring range   
Activation time< 2 s (The device will perform a self-test.)     
Setting time< 1s       
Long-time drift≤ 0.2% of the span per year      
Thermal hysteresis0.2% of the sensor's nominal measuring range / 10K (-20 to +80°C) from 4 bar 
 0.3% of the sensor's nominal measuring range / 10K (-20 to +80°C) up to 0.6 bar 

Conditions of use

Installation position / calibration positionAny position / standing vertically      
Medium temperature-40 °C to +125 °C (140 °C for max. an hour)     
Ambient storage temperature-40...+85°C (below -20 °C danger of cable breakage)   
Protection class acc. to EN60529IP 67 and IP 69K       
Electromagnetic EN 61326-1       


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) 
- Optional:  angle plug acc. to EN 175301-803     
- Optional:  reference cable      
Process connection- All standard flush-mounted process connections and those commonly used by the manufacturer        


Materials- Field housing / lid:CrNiSt 1.4301 (304)        
 - Electronics cast:Silgel        
 - Housing seal:FPM (Viton®)        
 - Pressure compensation element:Polyamide        
 - Process connection / connection adapter:CrNiSt 1.4404 (304)        
 - Process membrane:Al2O3 (99%)        
 - Reference cable, 5-wire with reference tube:PUR (recommended: 80 m maximum)        

Display and operation

DisplayMultiple-colour status LED         
Operation2-key concept         

Auxiliary energy resources

Power supply / burden12...30V DC, max. burden: (Vsupply - 12V) / 22mA         

Download Data Sheet: Pressure and Level Transmitter Keramess KS 050D Series