Mercury Heat Alarm with 10 Year Sealed Battery – HD-718
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Mercury Heat Alarm with 10 Year Sealed Battery – HD-718
Provides a quick alert to rapid rises in temperature rather than smoke, making it perfect for kitchens as it won't react to cooking fumes. The Heat Alarm will sound when it detects extreme temperature rises created by chip pan fires for example. Useful for areas with fumes and high humidity, such as kitchens, garages and lofts, the thermistor technology ensures you’re alerted to fires quickly without false alarms. The unit needs no battery maintenance, simply engage the internal battery using the switch on the base of the unit, fix to your desired surface and test on a regular basis. Once the detector nears the end of its 10 year life, a low battery indication alerts you to replace the unit.
This is a practical option if you need a heat detectors with clearly specified features and straightforward compatibility. The details below come from AVSL's current product information, so you can check the connections, size and performance before ordering.
What Is It Actually For?
It is designed for electronic thermistor sensing technology. The remaining features make it useful where you want a tidy, dependable setup without unnecessary complication.
Why Choose This One?
The HD-718 gives you a sensibly specified heat detectors from Mercury. It is worth considering when you want the stated specification without paying for features that may not be relevant to your setup.
Who Is It For?
This is aimed at home users, installers, performers, schools, venues and production teams who need a suitable heat detectors. Suitability will depend on the connections and specification your system requires, so those are worth checking carefully.
Key Features
- Electronic thermistor sensing technology
- 10 Year internal battery for peace of mind and hassle free use
- Easy installation and maintenance
- Mute function disables the alarm for a 9 minute period when required
- Low battery warning and auto-reset
- Suitable for homes in England and Wales. Not suitable for homes in Scotland under new regulations
- Tested in an approved laboratory to ensure full compliance to BS 5446-2: 2003
Specifications
| Brand | Mercury |
|---|---|
| Model | HD-718 |
| SKU | 350.130UK |
| EAN | 5015972231579 |
| Batteries | DC3V lithium battery (internal) |
| Alarm output | 85dB @ 3m |
| Sensor | Electronic thermistor |
| Alarm level | 54°~70°C |
| Lifetime | 10 years |
| Dimensions | 116mm Φ, 46mm height |
| Weight | 116g |
| Packaged weight | 0.1750kg |
| Packaged dimensions | 56 x 56 x 135 mm |
| Country of origin | CN |
| Tariff code | 9027101000 |
What’s Included
- 1 x Mercury Heat Alarm with 10 Year Sealed Battery – HD-718
Please Note
Please check connections, measurements and compatibility before ordering. Batteries, cables, fixings and accessories are only included where specifically stated in the product description.
Not Sure If This Is Right?
If you are not sure whether this heat detectors will work with your existing equipment, get in touch with the make and model of the equipment you are connecting it to and we will help you check.

