Fischer ME50 – programmable pressure transmitter

Fischer ME50 is high accuracy, rugged programmable pressure transmitter with onboard LCD display.  The instrument is equipped with rugged ceramic diaphragm or piezoresistive diaphragm, to meet high demanding industrial requirement of shock / vibration resistance, fluctuations etc.

It is suitable for all liquids and gaseous media application including chemicals, waste water, DM water etc.


Fischer ME50 – rugged, programmable pressure transmitter – aggressive liquids, gases

pdf-imagehigh accuracy, low hysteresis, positive  / negative pressure transmitter, with LCD display, programmable via display menu
Make: Fischer Messtechnik (Germany)
Model: ME50

Fischer ME50 - programmable pressure transmitter for positive, negative pressure
Fischer ME50 – programmable pressure transmitter for positive, negative pressure


Fischer ME50 is programmable pressure transmitter for liquid and gaseous media. It is equipped with:

  • Ceramic membrane / diaphragm measuring cell for measuring range upto 400 mbar
  • Front-flush piezoresistive element based measuring cell for measuring range above 400 mbar

ME50 can be configured or programmed to suit onsite conditions and media via either onboard display keypad or tool adaptor EU13.

Working Principle:

For ceramic diaphragm measuring cell (< 400 mbar):

The measuring pressure is directly applied on the rugged ceramic diaphragm. This applied pressure cause distortion on measuring membrane. The change in capacitance due to pressure, is measured at the electrodes of the ceramic carrier and diaphragm.
The electronics in the pressure transmitter housing convert the change in capacitance into standard electrical signals.

For piezoresistive diaphragm measuring cell (≥ 400 mbar):

The measured pressure acts on silicon diaphragm of a semi-conductor chip, causing it to distort. The specific resistance of the material changes in proportion of the level of distortion.

The electronics module in the pressure transmitter convert the change in resistance into standard electrical signals.


To optimise performance in line with prevailing process conditions, it is also possible to configure the pressure transmitter on-site via PC based programming adaptor EU13.

Key Features:

  • Onboard digital display, for measuring values
  • Free choice of process measurement direction , axial or radial
  • configurable on-site via onboard 3-key menu (off-set, range, damping, display indication)
  • Robust housing
  • High accuracy
  • High vibration resistance
  • Low hysteresis

Key Specifications:

  • With ceramic membrane / diaphragm measuring element:
    • Measuring range: -25 ~ +25 mbar to 0 ~ 200 mbar
    • smallest adjustable measuring span: 10 mbar
    • overpressure safety: 4 bar
  • With piezoresistive element measuring sensor ceramic membrane / diaphragm measuring element:
    • Measuring range: 0 ~ 400 mbar to 0 ~ 40 bar; -0.6 ~ 0 bar to -1 ~ 15 bar
    • overpressure safety: 4 bar to 120 bar
  • Accuracy: ± 0.2% of full scale (including hysteresis and repeat accuracy)
  • Permissible ambient temperature: -20° C ~ +80° C
  • Permissible medium temperature: -10° C ~ +85° C
  • Electrical connection: M12 plug-in connector
  • Protection class: IP65 acc. to DIN EN 40050
  • Display: 3 1/2 digit LCD
  • Materials (media contact): stainless steel 1.4404, ceramic AL2O3, Viton Seals
  • Material (housing): stainless steel 1.4404 / 1.4571
  • Nominal power supply: 24 VDC
  • Output: current / voltage 4~20mA,  2-wire
  • Inverted curve: rising / falling
  • Damping: 0 ~ 200 sec


Industrial areas:

  • Nuclear power plants
  • Thermal / gas fired power plants
  • Chemical & manufacturing industries
  • Semiconductor plants
  • Glass industries