Hengesbach Pressure and Level Transmitter PZM Series 050D

The Hengesbach PZM050D pressure transmitter is suitable for measuring the pressure and filling level, fulfilling the basic requirements of exac tness. The robust stainless steel field housing in the hygienic design and the checked protection classes IP 67 and IP 69K withstand all aggressive and residue-free cleaning procedures such as those required in the food industry.

The Hengesbach 050D series pressure transmitter 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 TurnDown of up to 4 can be set using the full and empty adjustment.

The modular process connection system PZM acts as the process connection and gives its name to the pressure transmitter. This enables universal connection to almost any process connection from DN40 using only a single pressure transmitter and a suitable process connection adapter.

The Hengesbach PZM pressure transmitters make a considerable contribution to achieving sustainable process chains. The process connection adapters available: Welded-in lugs for pipes and tanks, threaded and DIN 11851, conical couplings , VARIVENT® DIN 11864-1 female unions, DIN32676 clamps, etc.

The Hengesbach PZM modular process connection is certified according to EHEDG type EL-Aseptic class I and has thus been successfully tested for use in applications with the highest require- ments made of hygiene. The design with press screws and O-ring seals enables alignment of the transmitter with simultaneous micro-organism impermeability.

The Hengesbach  PZM050D pressure transmitters are highly-suited to use in applications with strict standards of hygiene and basic requirements of functionality and accuracy.


  • EHEDG-Aseptic certified modular process connection system
  • accuracy ≤ ± 0,2%FS
  • simple parametering via 2-key concept and multi-colour status-LED
  • vacuum- und overload safe
  • easy to clean and high protection classes IP 67 und IP 69K
  • for measurement of pressure and filling level in tanks and pipes with basci requierments
  • simple calibration, even without disconnection of the transmitter, through switchable power supply plant / calibrator supply

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General details
Device type/measuring principle PZM050D: piezoresistive
Measuring ranges PZM050D
Standard nominal measuring range [bar] Relative OP Absolute OP Relative OP Absolute OP
OP = overload protection [bar] 0 to 0.35 1 -1/0 to 10 30 0 to 10 30
Special measuring ranges are available on request 0 to 1 3 0 to 1 3 -1/0 to 30 90 0 to 30 90
-1/0 to 2.5 8 0 to 2.5 8 -1/0 to 100 250 0 to 100 250
All measurement cells are vacuum safe -1/0 to 5 15 0 to 5 15
Setting the measuring ranges via the 2 keys within the transmitter
Setting ranges Measuring range begin zero: 0 to 75% of the sensor’s nominal measuring span TD=4
Measuring span span: 25 to 100% of the sensor’s nominal measuring span
Burst pressure DIN16086 >= 4-fold nominal measuring range
Output signal 2-wire:   4 to 20mA with a test circuit connection in the device
Fault signal 22mA
Current limitation 3.8mA and 21mA (normal operation, cannot be set)
Measuring accuracy
Reference conditions acc. 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 carry out a self-test.)
Setting time < 1s
Long-time drift ≤ 0.2% of the span per year
Thermal hysteresis 0.2% 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 position Any position / standing vertically
Medium temperature T1: -40 °C to +125 °C (140 °C for max. an hour)
T2: -40…+200°C (high-temperature version)
Ambient storage temperature -40…+85°C (below -20 °C danger of cable breakage)
Protection class acc. to EN60529 IP 67 and IP 69K
Electromagnetic compatibility acc.to 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 – Membrane, flush-welded on the front, CrNiSt
– EHEDG type EL-ASEPTIC CLASS I, certified connection system PZM /
with press screw M38x1.5 and elastomer sealing
– EPM process seal (FDA conform) (range -20…+150°C, standard with temperature version T1)
– Process seal FPM (FDA conform) (range -40…+200°C, standard with temperature version T2)
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: CrNiSt 1.4435/1.4404 (316L)
– Reference cable, 5-wire with reference tube:  PUR (recommended: 80 m maximum)
Filling fluid Silicon oil (FDA)
Display and operation
Display Multiple-colour status LED
Operation 2-key concept
Auxiliary energy resources
Power supply / burden 12…30V DC, max. burden: (Vsupply – 12V) / 22mA
Accessories 050D
Certificates Calibration certificate
Declaration of conformity
Material certificate acc. to EN 10204
EHEDG certificate

Download Data Sheet: Pressure and Level Transmitter PZM Series 050D

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Ref: Hengesbach.com

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