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Battery Thermally Enhanced Optical Smoke Alarm (Thermoptek) with Escape Light - FireAngel ST-623E

Discontinued Product

This product has been discontinued.

Product Overview

Utilising FireAngel's Thermoptek thermally enhanced optical smoke sensor – the technology of choice for the UK's Fire and Rescue Service – the ST-623E is less prone to nuisance alarms caused by dust or cooking fumes and is quicker to detect smouldering fires than standard optical alarms. To aid evacuation in an emergency this product has an integrated extra-bright LED light which activates with the alarm to illuminate escape routes, making it a great choice for use in hallways or near stairs. For additional peace of mind FireAngel have also included Sleep Easy™ to silence low-battery chirps for 8 hours and Alarm Smart Silence™ so that it can still warn occupants of a real fire developing after silencing a nuisance alarm.

  • Battery: 2 x AA alkaline battery powered (included)
  • Warranty: 1 year manufacturer's warranty
  • Alarm Smart Silence™ feature helps provide maximum protection
  • Integrated extra-bright LED light helps evacuation during an alarm
  • Large test / silence button for hassle-free maintenance
  • Suitable for living rooms, bedrooms, hallways, and areas adjacent to a kitchen
  • Sleep Easy™ function temporarily silences the low battery warning chirp for 8 hours
  • Smoke alarm technology of choice for the UK's Fire and Rescue Service
  • Suitable for BS 5839-6: 2019 Grade F2 installations
  • Suitable for leisure accommodation vehicles (LAV)
  • Supplied with fixings; 2 x screws and 2 x rawl plugs
  • CE Marked and certified to BS EN 14604:2005
Technical Data
Product Code FAST623ER
Alternative Product Codes ST-623ER
Brand FireAngel
Battery Type

2 x AA batteries

Dimensions (HxDia)


Operating Temperature

+5°C to +38°C

Relative Humidity

30% to 90%

Sound Output



1 Year

Weight 0.11kg
Product Datasheets

Customer Reviews

2 customers have given this product an overall rating of 5 out of 5

Reviews by real customers

All of our product reviews are written by real customers that have purchased this product from us and are published without modification.

Rating: 5 / 5 Stars

Reviewed by: J S

outstanding product does eveything we need

Published on: 31st October 2021

Rating: 5 / 5 Stars

Reviewed by: L O

A good product with a replaceable battery Fed up with smoke alarms that come with non replaceable batteries that only last half the time they are supposed to. This was a perfect find. Good value for money.

Published on: 24th August 2020

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