Model GDA 40125 -Toxic / Oxygen Gas Detection Controller

The GDA 40125 has 2 user relays which can be programed to operate at any level within the gas detectors operational range as well as an independent fail safe fault relay. The unit`s alarm state is indicated by the display and by flashing LEDs additionally there is an o/p to drive a 24 VDC sounder / flasher (AVR-20) all of which can be muted from the front panel.

• Available for Carbon Monoxide, Oxygen, Ammonia, Hydrogen Sulphide, Sulphur dioxide and other gases on request
• 24 VDC operation with optional plug mounted power supply
• 4-20 mA o/p and optionally Modbus o/p
• Backlit LED display
• Real time display of gas concentration
• Mutable internal sounder
• 2 User selectable/ configurable alarm relays (SPCO)
  • Alarm relays are inhibited during calibration.
• External Mutable drive for AVR-20 series sounder / flasher unit.
• 1 Fault relay (SPCO)
• Australian Factory Certificate of Calibration

Poisoning: GDA sensors are designed to operate in a wide range of harsh environments and conditions. However, it is important that exposure to high concentrations of solvent vapours is avoided, both during storage and operation.

• Detectable Gases Carbon monoxide (CO), Oxygen (O2), Ammonia (NH3), Hydrogen sulphide (H2S), Nitrogen Dioxide (NO2)
• Detectable Gas Ranges CO=200ppm; O2= 25%vol; NH3=100ppm; H2S= 100ppm; NO2= 30ppm
• Power Requirements +24 VDC
• Output Types 4-20mA; 2 x SPCO alarm relays; 1 SPCO Fault relay; Alarm o/p, Optional MODBUS
• Power Consumption 2 Watts
• Output Specifications Max loop impedance 1K (24V)
• Connection Plug in connectors
• Wiring Two core min 0.75mm2 screened
• Operating Temperature -10 - 40°C
• Operating Humidity 15% to 90% RH peak non condensing
• Operating Pressure 800 to 1200 mbar
• Accuracy of Reading ± 3% of full scale reading in standard operating environment
• Warm Up Time 30 seconds
• Response Time T90 = 45 seconds at SATP (Standard Ambient Temperature and Pressure)
• Zero Drift < 0.1% / 30 days
• Calibration Drift < 0.25% / 30 days at SATP (Standard Ambient Temperature and Pressure)
• Sensor Technology Electrochemical Cell
• Calibration Requirement Annually with 6 monthly functional tests if sensor operated in standard operating environment
• Warranty 12 months from date of dispatch
• Dimensions 155mm x 130mm x 65mm (W x H x D)
• Enclosure Material ABS plastic & Brass C385
• Enclosure Rating Brass Sensors (CO & O2) IP43 | PTFE Sensors IP22
• Cable Entry User provided