Fischer DE28 – DP Transmitter (Water, Air, Gases)

Fischer offers, DE28, low cost, high performance differential pressure transmitter for air, gases, liquid, water, sewage, lubes pressure, level, flow monitoring.

DE28 is widely used for pump monitor and control applicatoin by Wilo, Siemens etc.

DE28 can be used with relatively clean and non-corrosive gases and liquids, it is used for measurement and control of positive or negative gauge pressure, differential pressure, vacuum pressure, flow monitoring, level monitoring.


Fischer DE28 – Differential Pressure Transmitter pdf-image

for Differential pressure, vacuum pressure, flow monitoring of gases, liquid, water
Make: Fischer Messtechnik (Germany)
Model: DE28

Fischer DE28 - Differential Pressure Transmitter (Water, Air, Gases)
Fischer DE28 – Differential Pressure Transmitter (Water, Air, Gases)

Fischer DE28 is low cost, high performance differential pressure transmitter for measuring over pressure, partial vacuum and differential pressure. It is suitable for media like liquids, air, gases, water upto 70 deg cel.

Working Principle:

DE28 works on principle of movement of pressure diaphragm due to pressure or differential pressure applied on either side.

Fischer DE28 has NBR or Viton diaphragm, thus offering continuous, repetitive high performance. The applied pressure create unbalanced force on the springs, which keep moving until new equilibrium reached.
The centre mounted tappet transfers the motion of diaphragm system to core of inductive displacement transducer. Therefore, subsequent converter circuit converts this displacement into electrical output signals.

Key Features:

  • Robust design with high repeatability of switching contacts
  • Over pressure protection
  • Short circuit protection
  • Maintenance free due to inductive circuit movement

Key Specifications:

  • Measurement range: 0-400 mbar to 0-6 bar
  • Operating temperature: Ambient: 0°C to +70°C
  • Protection class: IP54 per DIN EN 60529
  • Static operating pressure: 16 bar
  • Diaphragm: NBR or Viton
  • Measuring linearity: < 2.0% Full scale
  • Measuring hysteresis: < 1% Full scale
  • Operating voltage: 24 V DC/AC
  • Output signal: (0) 4-20 mA or 0-10 V, linear, proportional
  • Zero adjustment with the dial
  • 1 or 2 adjustable microswitches
  • Pressure chamber: Brass
  • Pressure connection: G 1/8, female thread

Applications areas:

  • Water pumps, lube pump monitoring
  • Pump control
  • Pipe water / liquid flow monitoring
  • Air ducts monitoring

Industrial areas:

  • HVAC & MEP applications
  • Cement plants
  • Hydro power plants
  • Manufacturing and chemical plants

Process Safety & Certifications:

All devices produced by Fischer, are inline with the requirements of DIN EN ISO 9001:2008.