The GDA 40125 Gas Detection Controller is a standalone gas detector unit with inbuilt display, sounder, flasher, relays and alarm driver. Available in the full range of GDA 2500 series electrochemical sensors which are temperature compensated and easily replaceable.
Designed, manufactured and supported locally in Australia.
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.
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.
Made in Australia and Supported in Australia
Generator Rooms | A range of devices from single point go / no go detectors such as the DA-2010 through to sophisticated IEC Ex type gas detectors / gas sensors can be used for detection of Natural gas, Propane, Butane and various other mixtures. Designed, Manufactured and Supported in Australia. |
Car Park Gas Monitoring Systems | The Gas Detection Australia car park gas detection system comprises of 1 up to 16 GDA 2525 carbon monoxide car park gas detectors per zone or level. The car park gas concentration signals are sent from the car park gas detector and the highest level from all the car park gas detectors are displayed locally on the control unit. The latest regulations (AS1668.2-2012) call for variable extraction control and minimum flow rates. Gas Detection Australia car park system's allows variable-speed drive (VSD) control that will meet this requirement of the australian car park gas detection standards. The car park carbon monoxide sensors (GDA 2525) are designed to be unobtrusive, simple to install and calibrate. All systems manufactured by Gas Detection Australia are built, programed and calibrated in our factory prior to delivery and will only require wiring and connecting . Designed, Manufactured and Supported in Australia. |
Battery Room Monitoring | The SI-100C and a range of associated Gas Detection Australia controllers can be used in battery room gas detection to detect hydrogen in battery rooms and sound alarms. The battery room gas detection systems comprise of a hydrogen gas sensor SI-100C and a gas sensor control unit. The Gas Detection Australia control unit GDA 4020 or GDA 4011 is situated external to the battery room to display the gas concentrations and the alarm status. The battery room gas detection system can then be interfaced to extraction fans, sounders or other apparatus. For smaller battery charging rooms the standalone GDA 40126 can provide an integrated sensor and controller with outputs to drive extraction fans and sounders. Designed, Manufactured and Supported in Australia. |
Cryogenic Room Gas Detection | Cryogenic freezing using liquid Nitrogen poses a problem of oxygen depletion. The GDA 2528 oxygen gas sensor offers a cost effective method of detection and low cost of maintenance. For standalone cyro-storage chambers housed in laboratories, the storage area can be monitored for oxygen depletion by the standalone GDA 40125 system. Designed, Manufactured and Supported in Australia. |
Laboratory and Classroom Monitoring | When gas is piped into rooms for experimental purposes such as CO2, CO, or Natural Gas .The Gas Detection Australia range of sensors can be used to detect any leaks that may present a danger to health or explosion. Designed, Manufactured and Supported in Australia. |
Specification Name | Specification Value |
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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 |
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GDA 40125 Toxic / Oxygen Gas Detector
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Part Number | Gas | Range | Replacment Sensor Module | |
40125-001 | Carbon Monoxide (CO) | 0-200 ppm | 2525-002 | |
40125-002 | Oxygen (O₂) | 0-25% Vol | 2528-002 | |
40125-003 | ||||
40125-004 | Ammonia (NH₃) | 0-100 ppm | 2526-002 | |
40125-005 | Hydrogen Sulphide (H₂S) | 0-100 ppm | 2529-002 | |
40125-006 | Nitrogen Dioxide (NO₂) | 0-30 ppm | 2527-002 | |
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Accessories |
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Part Number | Image | Description | ||
4012X-001 | GDA 4012X Series RS485 Modbus Output Addon Card | |||
GC01-001 | ![]() |
Gassing Cap with 500mm Length vinyl tubing | ||
PSP1-24-075 | ![]() |
Australian Mains Plugpack Power Supply. Output: 0.75 A @ 24 VDC | ||
PSE | ![]() |
Enclosed 24 VDC Power Supply |
The PSU P24 is an AC-DC plugpack power supply with an output of 24 VDC at 0.75A. The plugpack has a 3m cable with a 2.1 mm DC plug.
This sounder/flashers operates at 24VDC. The sounder can be permanently disabled so that unit acts as a flasher only. These units are designed for internal use. These are available in Red or Amber.
To test and maintain accuracy gas detection systems require regular testing and calibration. GDA can provide you with a complete line of calibration equipment to calibrate all of our gas sensors and detectors. Our calibration gas cylinders all come with N.I.S.T. certification and ISO 17025 approval so you can be confident that you will receive gas with the highest accuracy levels.