Kiddie Heat Dectector 9v Back Up

In stock
Quick Overview

Mains-powered heat alarm that can be interlinked with up to 23 other Kidde mains alarms, be they ionisation, optical or heat. Once interlinked, the detection of the relevant danger by an individual unit will sound across all the connected alarms.

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  • Interlink with up to 23 Firex 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 Test/HushTM 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 optical or ionisation smoke alarm is unsuitable, e.g. kitchens, loft spaces and garages. The Firex range requires installation by a professionally qualified electrician and complies with UK Building Regulations for new housing and associated standards (Grade D BS 5839, Part 6).



Power Supply230V mains-powered with 9V Alkaline battery back-up
Temperature Range0ºC to +40ºC
Humidity RangeUp to 93% Relative Humidity (RH) non-condensing
Storage and Transport-20ºC to +60ºC and 5–95% relative humidity (RH) non-condensing
Alarm Dimensions127 x 127 x 39mm
Bracket Dimensions133 x 133 x 6mm
Alarm Weight213g
Warranty6 years
ApprovalsBSI certified to BS5446 Part 2: 2003
CE tested and certified



SensorThermistor (Thermal Resistor) within detection unit
Button TestSimulates the effect of heat at the sensor, checks electronics and sounder
Automatic Self-testCircuitry is tested and unit beeps (chirps) if fault is detected
Supply Voltage230V AC, 50 Hz (nominal UK voltage)
Power Consumption< 15mA
ConnectionPush-in/snap-fit type connector with 150mm long flying leads (supplied)
Battery Back-upUser-replaceable alkaline 9V battery (522/6LR61)
Power-on IndicatorContinuous green LED
Alarm SounderElectronic piezo-electric sounder (T3 pattern sound - three pulses - space - three pulses) with soldered contacts
Sound Output85dB (A) minimum at 3 metres
Alarm Frequency3.2 kHz typical
Dust ProtectionIn-built foam gasket in rear of alarm to prevent dust ingress into rear of the alarm
Alarm StatusRed LED flashes approx once every five minutes = normal operation
Red LED flashes once a second = sensing heat in excess of 58ºC (sounder alarm sounds)
InterconnectionUp to 24 Firex and Kidde ‘Slick’ units (smoke, heat and CO) can be hardwire interconnected with optional control (see below)
Optional ControlsWired Remote Test and Hush Unit (REMTH) allows test and hush of interlinked units
Optional PattressesSMK23RU also has integral switchable relay for operating remote devices
SMK4896 – Surface mounting base for added ease of installation
FixingMounting 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 usedNORYL – Cover, main body and mounting bracket
Lead-Free StatusAll Firex alarms are lead-free