Fischer DE38 – Explosion proof DP Transmitter / Switch

Fischer offers, DE38### series explosion DP Transmitter for hazardous area Zone 2, 22 installation. It is CE Atex certified, multi-functional field mounted pressure monitoring device.

DE38 is differential pressure transmitter with dual limit detection switch, and digital LED readout display.

As DE38 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 of all gases, liquids, oil, lubricant and hydrocarbons.


Fischer DE38 Explosion Proof DP Transmitter pdf-image

for flow, pressure control, level monitoring in Hazardous area Zone 2, 22
Make: Fischer Messtechnik (Germany)
Model: DE38###R, DE38###S

Fischer DE38 Explosion proof DP Transmitter for gas, dust hazardous area
Fischer DE38 Explosion proof DP transmitter for gas, dust hazardous area

DE38 Explosion proof DP Transmitter cum switch is multi-functional field mounted pressure. It has combination of digital LED readout display, transmitter function and dual limit detection & control relays.

DE38 can be used for measurement and control of positive or negative gauge pressure, differential pressure, vacuum pressure of  gases, liquids or oil; lubricant / hydrocarbons, liquid flow measurement, and liquid level.

Thus, DE38 is compatible and ideal for use with relatively clean and non-corrosive gases and liquids.

DE38##R and DE38###S are explosion proof or flame proof version, and hence ideal for installation in gas hazardous area Zone 2 and dust hazardous area Zone 22 respectively.

Working Principle:

Fischer DE38 DP Transmitter uses a tough yet flexible sensing diaphragm embedded between stiffening plates and balanced by springs on either side.

Linear displacement of this LVDT is proportional to the pressure difference across the diaphragm. Thus, this displacement is converted to electrical signal output. An optional output signal can be slew rate limited, spreaded, inverted and transformed non-linearly by means of a table function.

Key Features:

  • Explosion proof ATEX certification with CE Ex II 3 G c EEx nA IIC T4 for DE38###R and CE Ex II 3 D c IP65 T125 for DE38###S
  • Robust design with high repeatability
  • Over pressure protection
  • Wear free non-contact LVDT sensing element, thus no maintenance
  • Signal output with possibility of various characteristic curve
  • Characteristic conversion of output via 3….30 entries table
  • Complete set-up of all parameters and print out by using optional PC programming interface EU03
  • Measuring range: 0-400 mbar to 0-1600 bar
  • Operating temperature: Ambient: -10°C to +70°C; Media:-10°C to +70°C
  • Protection class: IP65 per DIN EN 60529
  • Output: 0/4-20mA, 0-10 VDC
  • Display: 3 ½ digit LCD

Applications areas:

  • Monitoring of compressors, filters and vacuum systems
  • Measurement of differential pressure between supply and return fuel lines in heating & cooling systems (Chillers)
  • Flow measurement – lubricants, oil, hydrocarbons, water, gases
  • Control pressure – air, gases, oil, water, lubricants
  • Level measurement- tank, container of lubricants, oils, water, liquids etc

Industrial areas:

  • Cement plants
  • Nuclear plants, coal or gas fired power 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.
Devices for safety-relevant applications in nuclear-technical plants are subject to the extended requirements according to KTA (Kerntechnischer Ausschuss) 1401. 3505 and 3507 standards and rules, IAEA (International Atomic Energy Agency) and of IEC (International Electrotechnical Commission).

They attest the successful qualification of FISCHER Mess-und Regeltechnik GmbH as an executing company (contractor assessment), type testing of devices for safety-relevant processes, execution of relevant testing as well as evidence of operational reliability of assemblies.

High manufacturing penetration aims at expressing an almost authentic production, high quality standard and short-term response to customer needs.
Assembly and testing of measuring devices is ensured at especially provided production facilities. In addition, artificial ageing is created for ensuring the interaction of components. Thus, offering best time tested process instruments, far better than competitor. Hence, it is no surprise that Fischer is OE supplier to many process companies including Siemens, Wilo, Voith, ABB, BWM etc.