Fischer DE44 Ex – Explosion proof dual sensor DP Transmitter – Zone 2, 22

Working Principle:

Fischer DE44 Ex is based on dual piezo-resistive sensing element. The pressure is measured directly by piezo-resistive resistance bridge that is formed on surface of an integral silicon diaphragm in each sensor chamber.

The change in pressure results in change of resistance that is converted to varying voltage and which in turn convert to digital signals. The instrument’s internal micro-controller transfers measured value to LED Display, control two limit detection contacts/ relays, and transmit measured values through analog conversion stage as voltage or current signal.

An optional output signal can be slew limited, spreaded, inverted and transformed non-linearly by means of table function.

Key Features:

• Two independent differential pressure sensors
• Robust design, over-pressure protected
• Selectable pressure unit
• Signal output with possibility of spreading and inverting characteristic curve with any offset (optional)
• Characteristic conversion of output via 3….30 entries tablets)
• Fully programmable via PC based EU03 module
• Large LED Display

Key Specifications:

• Two independent differential pressure sensor.
  • Measuring range (of each sensor): 0 ~ 4.0 mbar up to 0 ~ 100 mbar; ± 2.5 mbar to ± 60.0 mbar
• Maximum static operating pressure: 50 mbar to 500 mbar
• Maximum safe pressure: 150 mbar to 1500 mbar
• Straight line deviation error (max): 1.0% full scale
• Pressure connection: G 1/8 female threads with optional cutting ring fittings for 6 or 8 mm tube
• Operating ambient & media temperature: -10° C to +70° C
• Protection class: IP65 per DIN EN 60529
• Electrical output: 4-20mA or 0-10V, 3 – wire
• Power supply: 24 V DC/ AC
• Switching contacts: 2 sets of programmable voltage free contacts: NO or NC
• Display: 3 1/2 digit LED
• Electrical connections: two round shell multi-pin connector sockets (M12, male)
• Material, housing: Polyamide PA 6.6
• Materials, media contact: Silicon, PVC, aluminum, brass

Application areas:

• Roll band filter monitoring
• Vacuum system monitoring
• Chimney draught measurement
• Flow and control pressure monitoring
• Surface coating system
• Pump monitoring and control
• Compressor monitoring and control

Industrial areas:

• Air conditioning and ventilation systems
• Auditorium, office, conference rooms
• HVAC and ventilation application
• Environment monitoring
• Clean room and laboratory rooms