Fischer DE61 – Low pressure DP Transmitter Switch

Fischer DE61 is micro-processor based electronic module, differential pressure transmitter with adjustable limit contacts. It can precisely measuring minute pressure in range fof pascal.

It comes with onboard LED display and limit contacts.


Fischer DE61 – Very low pressure DP Transmitter Switch

pdf-imageVery low pressure differential pressure transmitter with limit switch, micro-processor based signal processing, square-rooted optional output
Make: Fischer Messtechnik (Germany)
Model: DE61


Fischer DE61 is micro-processor based smart differential pressure transmitter for overpressure, negative pressure and differential pressure monitoring of neutral liquid and gases. With its inbuilt electronic module, many characteristic output eg. square root output can be obtained, and thus instrument can be used for flow rate, flow volume monitoring of media.

Fischer DE61 - Low pressure DP Transmitter with limit switch
Fischer DE61 – Low pressure DP Transmitter with limit switch

The instrument is designed for monitoring very low pressure range, ie. in range of Pa, thus precisely monitoring any minute pressure change. DE61 comes with large onboard LCD display, limit switch / contacts and analog voltage or current transmission output with characteristic curve implementation.

Working Principle:

DE61 is based on pressure sensitive capacitive element. Due to modern micro-mechanical manufacturing process, DE61 is highly overpressure safe, shock and vibration resistant and long term stable

The differential pressure acts on sensor element and produce measuring signal. The electronic amplifier, then generates an electrical analog current output signal. This output signal is used for external data processing and also shown on LCD display.

LCD display can also be used for indication and precise adjustment of differential pressure dependent switching functions. Both changeover contacts can be adjusted to any value within measuring range.

Key Features:

  • High sensitivity
  • Robust Design, over pressure protected
  • Wear resistant sensor
  • High resistance to corrosion
  • Low hysteresis
  • Large LED Display

Key Specifications:

  • Measuring range: 0 ~ 25 Pa to 0 ~ 400 Pa
  • Nominal pressure: 600 mbar
  • Max. static pressure: overpressure safe up to permitted nominal pressure
  • Linearity: < 1 % of full scale
  • Hysteresis: < 0.1 % of full scale
  • Temperature drift: < 0.5 % full scale / 10K
  • Operating ambient temperature: -10° C to +60° C
  • Operating media temperature: -20° C to +70° C
  • Protection class: IP54 per DIN EN 60529
  • Electrical output: (0) 4-20mA, 2 / 3 – wire
  • Square rooted output: ± 0.5 %
  • Power supply: 24 V DC
  • Switching contacts: 1 or 2 potential-free change over contact, adjustable setpoint via LCD display
  • Pressure connection: female thread G 1/4, threaded hose coupling 6/8 mm flexible tube
  • Display: 3 1/2 digit LCD display
  • Electrical connections: internal connector block, M 16 x 1.5 connection, M12 plug connection
  • Material, housing: diecasted aluminum, varnished
  • Measuring element: silicon, glass, aluminum

Application areas:

  • Filter technique
  • Precision measurements in air conditioning conduits
  • Clean room pressure compensation
  • Burner vacuum measurement
  • Circulating air controlling in furnaces

Industrial areas:

  • Air conditioning and ventilation systems
  • HVAC and ventilation application
  • Environment monitoring
  • Clean room and laboratory rooms