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

Flush-Mounted Pressure and Level Transmitter PZM 100_101 Series
Flush-Mounted Pressure and Level Transmitter PZM 100_101 Series

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

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General details

Device type / measuring principle PZM 100/101: piezoresistive
VRM 100/101: capacitive
Measuring ranges PZM 100/101 VRM 100/101
Standard nominal measuring range [bar] relative OP absolute OP relative OP absolute OP
OP = overload protection [bar] 0…0.35 1 -1/0…4 25 0…4 25
0…1 3 0…1 3 -1/0…10 40 0…10 40
-1/0…2.5 8 0…2.5 8 -1/0…20 40 0…20 40
Special measuring ranges are available on request. -1/0…5 15 0…5 15 -1/0…40 60 0…40 60
-1/0…10 30 0…10 30 -1/0…70 105 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 ranges Via the keypad of the OPUSM display and operating module / via the integrated on-site display
Setting ranges Start 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 signal 2-wire:   4…20mA with a test circuit connection in the device
Fault signal Optional: 3.8mA, 22mA, hold (i.e. holding the last value)
Current limitation 3.85mA and 21.5mA (normal operation)
Integration time Continuously selectable between 0 and 300s (setting time after a pressure leap)

Measuring accuracy

Reference conditions acc. 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 (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 position Any position / standing vertically
Medium temperature PZM: 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 temperature Type 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 EN60529 IP 67 and IP 69K
Electromagnetic compatibility Sensitivity 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 fluid PZM: silicon oil (FDA)
VRM: medical mineral oil (FDA)

Display and operation

Display LCD, 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 units Pressure: mbar, bar, psi, Pa, mH2O, mmHg, Torr, atm, at, kg/cm²
Temperature*1: °C, °F, K, °R, °Ré
Additional displays Output current in mA or % (in relation to the span)
Operation 100:00:00 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 / burden 12-36V DC, max. burden: (Vsupply – 12V) / 24mA

Accessories 100 series

OPUSM display and operating module External display and operating module, CrNiSt, IP 67, 41x70mm, 1m connection cable and round plug-in
connector M12x1
Certificates Calibration 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

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