Flush-Mounted Pressure and Level Transmitter PZM 100/101 Series Hengesbach

The PZM  pressure transmitters are suitable for taking pressure and filling level measurements in pipelines and containers. The modular process connection system offers a wide range of connection adapters and helps to cut costs in the long term. The flush-mounted process connection with O-ring seal and stainless steel membrane is certified to EHEDG type EL-ASEPTIC CLASS 1 and is thus predestined for measurements which satisfy even the most stringent hygiene requirements. The sensor measuring ranges of the piezoresistive vacuum-proof measuring cell with stainless steel membrane of the PZM pressure transmitters range from -1/0…0.35bar to -1/0…100bar.

Special measuring ranges are possible for both versions. 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 200°C. Furthermore, using the on-site display with series 100 and the display and operating module OPUS M in series 101, the pressure transmitters can be simply read out, configured and diagnosed.


  • EHEDG-aseptic certified modular process connection system
  • precise measurements ≤ ± 0,15% FS
  • Turn Down 10
  • integrated or external display and operating module OPUSM
  • vacuum proof and extremely overload safe
  • direct entry of parameters with plain text display
  • easy to clean and high protection classes IP 67 and IP69K
  • application strengths: content and process pressure measurements / vacuum measurements even at high temperatures


General details

Device type / measuring principlePZM 100/101: piezoresistive         
 VRM 100/101: capacitive         
Measuring ranges  PZM 100/101  VRM 100/101  
Standard nominal measuring range [bar]relative OP absolute OPrelativeOP absolute OP
OP = overload protection [bar]0...0.35 1    -1/0...425 0...4 25
 0...1 3 0...1 3-1/0...1040 0...10 40
 -1/0...2.5 8 0...2.5 8-1/0...2040 0...20 40
Special measuring ranges are available on request.-1/0...5 15 0...5 15-1/0...4060 0...40 60
-1/0...10 30 0...10 30-1/0...70105 0...70 105
-1/0...30 90 0...30 90      
All measuring cells are vacuum-proof         
-1/0...100 250 0...100 250      
Setting the measuring rangesVia the keypad of the OPUSM display and operating module / via the integrated on-site display
Setting rangesStart the measuring zero:0...90% of the sensor's nominal measuring span TD=10
 Measuring 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      
DIN IEC 770             
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 (VRM)  
≤ ± 0.2% of the sensor's nominal measuring range / 10K (-20...+80°C) from 4 bar (PZM)       
≤ ± 0.3% of the sensor's nominal measuring range / 10K (-20...+80°C) up to 0.6 bar (PZM)       

Conditions of use

Installation position / calibration positionAny position / standing vertically         
Medium temperaturePZM:T1:-40...+125°C (140°C over one hour at the most)         
  T2:-40...+200°C (high-temperature version)         
 VRM: -40...+140°C         
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- Membrane, flush-welded on the front, CrNiSt, other materials available on request            
 - EHEDG type EL-ASEPTIC CLASS 1, certified connection system PZM / VRM            
 with press screw M38x1.5 and elastomer sealing            
 - Process seal EPM (FDA) (temperature range: -20...+150°C)            
 - Process seal FPM (FDA) (temperature range: -40...+200°C)            
Materials- Field housing / lid: CrNiSt 1.4301 (304)         
 - Housing seal: FPM (Viton®)         
 - Pressure compensation element:polyamide         
 - Inspection gauge (type 100):polycarbonate         
 - Process connection / connection adapter:CrNiSt 1.4404 (316L)         
 - Process membrane:CrNiSt 1.4435/1.4404 (316L)         
 - Locking screw (type 101):CrNiSt 1.4301 (304)         
 - Reference cable: 5-wire with reference tube:  PUR (recommended: 80m maximum)         
Filling fluidPZM:silicon oil (FDA)          
 VRM:medical mineral oil (FDA)          

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         
 Temperature*1:°C, °F, K, °R, °RĂ©          
Additional displaysOutput current in mA or % (in relation to the span)         
Operation100:00:00 via the configuration menu with the integrated on-site display         
 101:00:00 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          
 EHEDG certificate           

Download Data Sheet: Flush-Mounted Pressure and Level Transmitter PZM 100_101 Series

Ref: Hengesbach.com