OG30 Mains Heat Alarm

Part #: OG30

Mains-powered heat alarm that can be interconnected with up to 18 other mains alarms, be they ionisation, optical or heat. Once interconnected, the detection of the relevant danger by an individual unit will sound across all the connected alarms.

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  • Interconnect with up to 18 hard-wired alarms – all alarms sound if danger is detected
  • Alarm memory – identifies source unit within interconnecting network
  • Reduced energy consumption – lower lifetime running costs
  • Combined Hush/Test button allows regular testing of alarm function and can be used to temporarily silence nuisance alarms
  • Auto reset after activation
  • Tamper-resistant locking device prevents unauthorised removal without the use of a tool
  • Mains operation – 9V Alkaline back-up battery supplied as standard


Mains-powered heat alarms can be used throughout the home in humid or dusty environments where an photoelectric or ionization smoke alarm is unsuitable, e.g. kitchens, loft spaces and garages. The mains alarm’s range requires installation by a professionally qualified electrician and complies with AS 1603.3:2018 standards.


Feature Description
Model OG30
Power Supply 240V mains-powered with 9V Alkaline battery back-up
Temperature Range 0ºC to + 40ºC
Humidity Range Up to 93% Relative Humidity (RH) non-condensing
Storage and Transport -20ºC to +60ºC and 5–95% relative humidity (RH) non-condensing
Alarm Dimensions 127 x 127 x 54mm
Bracket Dimensions 133 x 133 x 6mm
Alarm Weight 213g
Warranty 10 years
Approvals AS 1603.3:2018
Attribute Description
Sensor Thermistor (Thermal Resistor) within detection unit
Button Test Simulates the effect of heat at the sensor, checks electronics and sounder
Automatic Self-test Circuitry is tested and unit beeps (chirps) if fault is detected
Supply Voltage 240V AC, 50 Hz
Power Consumption < 10mA
Connection Push-in/snap-fit type connector with 150mm long flying leads (supplied)
Battery Back-up User replaceable alkaline 9V battery (522/6LR61)
Power-on Indicator Alarm Sounder Continuous green LED
Alarm Sounder Electronic piezo-electric sounder
(T3 pattern sound – three pulses – space – three pulses) with soldered
Sound Output 85 dB (A) minimum at 3 metres
Alarm Frequency 3.2 kHz typical
Alarm Status Red LED flashes approx once every five minutes = normal operation
Red LED flashes once a second = sensing heat in excess of 58ºC
(sounder alarm sounds)
Interconnection Up to 18 units (smoke and heat) can be hardwire interconnected
Fixing Mounting bracket ring supplied with two ‘T’ slot fitting option
57mm spacing to a maximum of 90mm for standard screw fittings on back boxes
Bracket has 50mm diameter central access hole for cabling
Plastics used NORYL – Cover, main body and mounting bracket
Lead-Free Status All mains alarms are lead-free

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