Hengesbach Pressure and Level Transmitter Keramess KS 100/101


The KERAMESS pressure transmitters are suitable for taking pressure and filling level measurements in pipelines and containers. The wide range of process connections enables use in all applications in the food and pharmaceutical industries. The vacuum-proof and extremely overload safe measuring cell with a ceramic membrane made of highly pure aluminium oxide works on the basis of the capacitive measuring principle. The KERAMESS pressure transmitters are designed to measure from -1/0…1 to -1/0…70bar. The measuring ranges 0...0.05bar and -0.1...+0.1bar are available alongside other special measuring ranges.

Thanks to the ceramic membrane, the KERAMESS pressure transmitters are particularly suited for aggressive and abrasive media. The design for long-term medium temperatures of up to 125°C enables CIP and SIP cleaning methods to be used on the transmitters. The high protection classes of IP67 and IP69K guarantee that the devices can be safely cleaned on the outside with foam and a high-pressure cleaner and that moisture is reliably prevented from entering into the device. For additional protection against moisture, the electronics are fully encapsulated in the housing. All the pressure transmitters in series 100/101 are designed for universal applications and, in particular, for applications with constantly high temperatures of up to 125°C. Furthermore, using the on-site display with series 100 and the display and operating module OPUSM in series 101, the pressure transmitters can be simply read out, configured and diagnosed.


  • precise measurements with an accuracy of ≤ ± 0,15% FS
  • with dry ceramic measuring cell
  • Turn Down 10
  • easy to clean an high protection classes IP 67 und IP69K
  • integrated on-site display or external OPUSM display and operating module for parametrization and display of measuring values
  • application strengths: measurement of content and process pressure with small measuring ranges with an overload-safe ceramic measuring cell, also suitable for abrasive media
  • direct entry of parameters with plain text display




General details

Device type / measuring principleKS 100/101: capacitive       


Measuring ranges     KS 100/101   
Standard nominal measuring ranges [bar]relative OP  relative OPabsoluteOP
OP = overload protection [bar]0.05 4  40 600.14
0.1 4  70 1050.26
 ±0.1 4  -1...1 100.46
 0.2 6  -1...2 18110
 0.4 6  -1...4 25218
Special measuring ranges are available on request.1 10  -1...10 40425
2 18  -1...20 401040
4 25  -1...40 602040
All measuring cells are vacuum-proof    
10 40  -1...70 1054060
20 40     70105
Setting the measuring rangesVia the keypad ofthe OPUSM display and operating module / via the integrated on-site display
Setting rangesStart the measuring zero:0...90%of the sensor's nominal measuring spanTD=10
 Measuring span span:10...100%  of the sensor's nominal measuring span
Burst pressure DIN16086≥ 4-fold measuring range       


Output signal2-wire:   4...20mA with a test circuit connection in the device  
Fault signalOptional: 3.8mA, 22mA, hold (i.e. holding the last value)   
Current limitation3.85mA and 21.5mA (normal operation)     
Integration timeContinuously selectable between 0 and 300s (setting time after a pressure leap) 

Measuring accuracy

Reference conditionsacc. to DIN IEC 770       
Linearity, hysteresis and repeatability as per the limit point method DIN IEC 770≤ ± 0.15% of the sensor's nominal measuring range   
Activation time< 5s (the device will carry out a self-test.)   
Setting time (without damping)< 200ms         
Long-time drift≤ 0.2% of the span per year       
Thermal hysteresis≤ ± 0.75% beginning of the measuring range / ≤ ± 0.8% end of the measuring range 

Conditions of use

Installation position / calibration positionAny position / standing vertically (position-dependent zero point displacement) 
Medium temperatureT1: -40...+125°C (140°C over one hour at the most)   
Ambient storage temperatureType 101:-40...+85°C       
 Type 100:-30...+75°C       
 (Below -20°C cable breakage might occur and the display's function may be impaired.) 
Protection class acc. to EN60529IP 67 and IP 69K       
Electromagnetic compatibilitySensitivity against interference:  acc. to DIN IEC 61000-6-2  
 Interference radiation:acc. to DIN IEC 61000-6-4  


Electrical connection- Standard: cable screw connection M16x1.5, nickel-plated brass, stainless steel available on request
- Optional: round plug-in connector M12x1, nickel-plated brass, stainless steel available on request   
- Optional: angle plug acc. to EN 175301-803       
- Optional: reference cable        
Process connection- All standard front-mounted process connections and those that are commonly used by the manufacturer        
Materials- Field housing / lid:CrNiSt 1.4301 (304)        
 - Housing seal:FPM (Viton®)        
 - Pressure compensation element:polyamide        
 - Inspection gauge (type 100):polycarbonate        
 - Process connection:CrNiSt 1.4404 (316L)        
 - Process membrane:Al2O3 (99%)        
 - Locking screw (type 101):CrNiSt 1.4301 (304)        
 - Reference cable: 5-wire with reference tube:PUR (recommended: 80m maximum)        

Display and operation

DisplayLCD, 4-digit numerical display and 5-digit alphanumerical display        
 Type 100: integrated on-site display (cannot be separated from device)        
 Type 101: external OPUSM display and operating module        
Displayable unitsPressure:mbar, bar, psi, Pa, mH2O, mmHg, Torr, atm, at, kg/cm²        
 Volume:l, hl, dm³, m³, ft³, US gal, UK gal, US bl, UK bl        
 Mass:kg, t, lbs, tn. sh., tn. l.        
Additional displaysOutput current in mA or % (in relation to the span)        
OperationType 100: via the configuration menu with the integrated on-site display        
 Type 101:via the configuration menu with the external OPUSM display and operating module        

Auxiliary energy resources

Power supply / burden12-36V DC, max. burden: (Vsupply – 12V) / 24mA        

Accessories 100 series

OPUSM display and operating moduleExternal display and operating module, CrNiSt, IP 67, 41x70mm, 1m connection cable and round plug-in        
 connector M12x1        
CertificatesCalibration certificate        
 Declaration of conformity        
 Material inspection certificates as per EN 10204        

Data Sheet: Pressure and Level Transmitter Keramess KS 100/101

Ref: Hengesbach.com