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AVR 20 : Alarm Flasher and Sounder

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.

IS-A105N : Intrinsically Safe Alarm Sounder

The IS-A105N is a high output, 105dB alarm sounder. Approvals include ATEX, IECEx and GOST-R for Zone 0 applications and FM approval for Class I Division 1 and Class I Zone 0 applications.

The IS-A105N is suitable for all intrinsically safe signalling applications including fire, security and process control.

IS-L101L : Intrinsically Safe LED Beacon

The IS-L101L unit is an intrinsically safe field mounting beacon which provides a bright
flashing warning signal.


The unit can be used independently or combined with an IS-A105N 49 alarm sounder. Combination
units can utilise a common zener barrier or galvanic isolator and may be coupled together or
mounted seperately. With the IS-A105N the alarm accept function can be utilised. By closing a pair of
external contacts (i.e push switch) the operator may silence the alarm for set periods between 5
seconds and 2 hours. If after the preset time the alarm condition still exists the sounder will activate
again.

GDA 2300 : MODBUS Gas Detection Sensor

The GDA 2300 series board is a slave MODBUS interface board that can read from a 2500 series sensor head and/or a 4-20 mA sensor input. The slave device can communicate MODBUS RTU with a baud rate of 9600 or 19200 bps and can have up to 32 devices on a single MODBUS line. The device support the functions ‘Read Holding Register’ (0x03) to read the concentration of the sensors and ‘Write Single Register’ (0x06) to control the 2 output relays from the MODBUS Master. The calibration of the device is easily done with span and zero push buttons that are mounted on the board.

GDA 2528 : Oxygen Gas Sensor (0-25% vol, 4-20 mA o/p)

The 2528 Oxygen gas sensor is a 2 wire 4-20 mA Loop Powered device with a range of 0-25% vol Oxygen. It has an electrochemical gas sensing unit which is temperature compensated. The gas sensor element is on a pluggable lead allow ease of replacement. The oxygen gas sensor electronics are housed in a robust ABS sun tolerant plastic enclosure rated IP65; the sensor head and its electronics are housed in a metal enclosure giving it excellent RFI and EMC compatibility. The sensor head is fitted with a splash proof cover giving an IP62 rating.

DESIGNED, MANUFACTURED and SUPPORTED by GAS DETECTION AUSTRALIA.

GDA 2560 : Flammable Gas Sensor (0-100% LEL, 4-20 mA o/p)

The GDA 2560 Flammable gas sensor [Hydrogen, Methane, Butane, Propane, Acetylene, and Ammonia] is a 3 wire (24 VDC) 4-20 mA device. This gas sensor is designed to be used areas classed as NON hazardous. It has an electron resistive catalytic sensing element which is temperature controlled. The sensor element is on a pluggable lead allow ease of replacement. The flammable gas sensor's electronics are housed in a robust ABS sun tolerant plastic enclosure rated IP65; the sensor head and its electronics are housed in a metal enclosure giving it excellent RFI and EMC compatibility. The sensor head is fitted with a splash proof cover giving an IP62 rating.
DESIGNED, MANUFACTURED and SUPPORTED by GAS DETECTION AUSTRALIA.

GDA 2628 : Oxygen Gas Sensor (0-25% vol, 4-20 mA, 0-5 V, 0-10 V o/p)

The GDA 2628 Oxygen gas sensor is a further enhancement of the GDA 2528 Oxygen gas sensor that allows AC and DC operation as well as providing the option of 4-20 mA, 0-10 V and 0-5 V operation. The additional voltage o/p can be used on BMS systems that use voltage inputs as opposed to current input. It has an electrochemical gas sensing unit which is temperature compensated. The gas sensor element is on a pluggable lead to allow ease of replacement. The oxygen gas sensor electronics are housed in a robust ABS sun tolerant plastic enclosure rated IP65; the sensor head and its electronics are housed in a metal enclosure giving it excellent RFI and EMC compatibility. The sensor head is fitted with a splash proof cover giving an IP62 rating.

DESIGNED, MANUFACTURED and SUPPORTED by GAS DETECTION AUSTRALIA

GDA 2000Ex : Explosion Proof (IEC Ex) Flammable Gas Detector

The GDA 2000Ex is certified for use in Zone 1 Hazardous areas within Australia. The sensor is certified IEC Ex. It operates from 24 VDC and gives a 4-20 mA o/p over the range 0-100% LEL of the gas to which it is calibrated. Typical gases are Methane, Propane and Hydrogen. The unit can be programmed and calibrated without opening. It is fitted with a sensor splash cover giving a head IP rating of IP66 .

FULLY TECHNICALLY SUPPORTED by GAS DETECTION AUSTRALIA.

GDA 40125 : Toxic/Oxygen Gas Detection Controller (4-20 mA o/p)

The GDA 40125 units are an integrated, wall mounted single gas detector control unit with a display. They interface with the full range of GDA 2500 series Toxic and Oxygen gas sensors. The unit has 2 user relays which can be programmed to operate at any level within the gas detectors operational range. Additional to this there is an independent fail safe fault relay. There is an o/p to drive a 24 VDC sounder / flasher (AVR-20Y/R) which can be muted from the front panel. The alarms are indicated on the display and by flashing LEDS. There is also a facility for modbus connection which can be added to the GDA 401205.

DESIGNED, MANUFACTURED and SUPPORTED by GAS DETECTION AUSTRALIA.

GDA 40126 : Flammable Gas Detection Controller (4-20 mA o/p)

The GDA 40126 units are an integrated, wall mounted single gas detector control unit with a display for Flammable gases such as LNG, LPG, Propane, Hydrogen, Acetylene, Solvents, and other flammable vapours. The unit has 2 user relays which can be programmed to operate at any level within the gas detectors operational range. Additional to this there is an independent fail safe fault relay. There is an additional o/p to drive a 24 VDC sounder /flasher (AVR20Y/R) which can be muted from the front panel. The alarms are indicated on the display and by flashing LEDS. There is also a facility for modbus connection which can be added to the gas GDA 40126.

DESIGNED, MANUFACTURED and SUPPORTED by GAS DETECTION AUSTRALIA.

GDA 4011 : Flush Mount Single Channel Controller

This is a flush wall mounted (Clipsal GPO) single channel control unit. It interfaces to all the GD a series of 4-20mA sensors. There are 3 relay o/p’s, Alarm 1, 2, and fault. These relays are SPCO. The backlit LCD display indicates current gas concentration and alarm status. There is an internal sounder which can be muted from the front panel. The unit requires 24v dc.

DESIGNED, MANUFACTURED and SUPPORTED by GAS DETECTION AUSTRALIA.

GDA 4020 : Two Channel Controller

The GDA 4020 control unit has 2 x 4-20 mA i/p with 3 associated programmable relay alarm levels per sensor. There is an independent fault relay. There are 3 x analog o/p’s which can be configured for either channel as 4-20 mA, 0-20 mA, 0-5 V or 0-10 V. The controller has an isolated RS485 o/p which can be configured to drive modbus or an interface to the M2001 mimic panel. All configurations are carried out via the front panel push buttons. The unit requires 24 VDC.

DESIGNED, MANUFACTURED and SUPPORTED by GAS DETECTION AUSTRALIA.

GDA 2400 : Multiplexed 8 Input Controller

The GDA 2400 control unit can take up to 8 x 4-20 mA i/ps. The controller selects the highest reading from the sensors and displays the highest reading of gas from the sensors. This controller is used when ALL the gas sensors are the same type. It is particularly useful in Periphery monitoring and CAR PARK Ventilation control. There are 3 programmable relay alarm levels. There is an independent fault relay. There are 3 x analog o/p’s which can be configured for either channel as 4-20 mA, 0-20 mA, 0-5 V or 0-10 V o/p’s. The controller has an isolated RS485 o/p which can be configured to drive modbus or an interface to the M2001 mimic panel. All configurations are carried out via the front panel push buttons. The unit requires 240 VAC.

DESIGNED, MANUFACTURED and SUPPORTED by GAS DETECTION AUSTRALIA.

M2001 : Flush Mount Mimic Panel

The M2001 is a low profile flush wall mounted MIMIC panel. These units are used on multi entry rooms so that users may view the gas levels and alarm status of each entry point for entering the room The M2001 is used in conjunction with the GDA 4020 AND GDA 2400 control unit. The M2001 derives its power and RS485 communications from the 4020/ 2400. The unit’s backlit LED display shows the real time concentration of the gas sensors connected to the 4020/ 2400 and any alarms that occur. The M2001 has an inbuilt sounder which can be muted from the front panel. The unit has two alarm relays which activate and deactivate in conjunction with the alarm status of the 4020 and 2400 control panel.

DESIGNED, MANUFACTURED and SUPPORTED by GAS DETECTION AUSTRALIA.

MS001 : Flush Mount Mute Switch

The MS001 uses one of the alarm SPCO relays from the GDA 4020, GDA 4011, or GDA 2400 to drive the AVR-20R/YM sounder- flasher. The sounder- flasher can be muted by incorporating the MS001 into the o/p switched 24 VDC from the control panel. The sounder will sound when a gas alarm occurs and continue sounding until either the alarm level falls below its threshold value or the MS001 button is pressed. The Mute function automatically resets when the alarm condition terminates.

DESIGNED, MANUFACTURED and SUPPORTED by GAS DETECTION AUSTRALIA.