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Thermally Enhanced Optical Smoke Alarm (Thermoptek) - FireAngel ST-625

More than 20 in stock Expected dispatch: Today
94 Customer Reviews
1 unit 2+ units 5+ units

£9.83 inc VAT

£8.19 ex VAT

£9.59 inc VAT

£7.99 ex VAT

£9.47 inc VAT

£7.89 ex VAT

Product Overview

The FireAngel ST-625 smoke alarm uses Thermoptek optical smoke sensing technology; making it thermally enhanced and quicker to detect smouldering fires compared to standard optical smoke alarms. Featuring a large test/hush button, the FireAngel ST-625 has been designed to make silencing and testing your smoke alarm easier.

  • Battery: AA alkaline batteries (included)
  • Warranty: Safelincs Exclusive 5 Year Warranty
  • CE marked and Kitemarked to BS EN 14604
  • Test and hush button feature
  • Thermally enhanced optical smoke sensing technology
  • Less prone to sound falsely from cooking fumes
  • Ideal for areas adjacent to kitchens e.g. downstairs hallway (not suitable for kitchen or garage)
  • Sleep Easy™ function temporarily silences low battery and end of life warning chirp for 8 hours
  • Suitable for installations complying to BS 5839-6: 2019 Grade F2
  • Sensing technology of choice for the UK's Fire and Rescue Service
  • Supplied with fixings; 2 x screws and 2 x rawl plugs
Technical Data

Technical Data

This is the technical data for the Thermally Enhanced Optical Smoke Alarm (Thermoptek) - FireAngel ST-625.

Product Code FAST625
Alternative Product Codes ST-625, ST-625R, st265
Weight 0.23kg
Dimensions (HxDia) 34x107mm
Battery Type 2 x AA batteries
Sound Output 85dB at 3 metres
Operating Temperature +4 °C to +38 °C
Relative Humidity (non-condensing) Up to 90%
FAQs (10)
Q. Is the ceiling mounting for the FireAngel 625 identical to that for the FireAngel 620?
A.

The FireAngel 625 smoke alarm uses a different base plate. Therefore it would be necessary to install a fresh base plate if switching from one model to the other.

Q. What smoke alarm should I use in a bedroom with an en suite bathroom?
A.

It is usually recommended to install an optical smoke alarm in a bedroom. This is because optical smoke alarms are slightly quicker at detecting slow smouldering fires that can originate from upholstery type materials and over-heated wiring. Also, an optical smoke alarm would be less likely to sound a false alarm than an ionisation would, if steam/water droplets were present from the bathroom. Detectors should be installed as central to the room as possible; however for your application I would also consider the position of the en suite to make sure that the detector is not in the direct path of the joining door. This is just to try and avoid the chances of a false alarm. No detector is designed for use in bathroom areas.

Q. How do I safely dispose of my old smoke alarms?
A.

Safelincs is signed up to Valpak's WEEE (Waste Electrical and Electronic Equipment) Distributor Take-Back Scheme (Registration ID: 7370). Private households can therefore drop off their electronic and electrical fire safety waste at their municipal recycling centre when they are purchasing new products from us. To find your nearest recycling centre, please visit www.recycle-more.co.uk.

Q. How long do the batteries last in smoke alarms?
A.

The 9V alkaline batteries last 12-18 months. Lithium batteries will usually last 5x longer than their alkaline counterparts, achieving around 5 years lifetime. Some lithium cells are also rechargeable, and when used in a mains-powered alarm may last for the entire functional lifespan of the alarm. Newer alarm models may also feature a "sealed" lithium battery. These batteries are specialist components which are designed to not be removed or need replacing by the user, and have been tested by the alarm manufacturer to ensure they last for the lifetime of the alarm.



Please Note: the actual lifetime of your batteries depends on how often the alarms are tested or activated, as sounding the alarm draws more power than when the alarms are "waiting" to detect fire. You should also read your alarm's manual to make sure you only use the recommended types and brands of batteries, as failing to follow these instructions may cause the alarm to malfunction, not alerting you in the event of a fire, and might also invalidate the warranty.

Q. Can a smoke alarm be fitted with a sticky adhesive pad in a let property?
A.

The sticky pad is suitable for all battery operated smoke alarms. However, we cannot judge if battery alarms are suitable for your let property, as let properties usually require mains powered alarms. There is some advice to this in the governments guides to fire risk assessments. http://www.safelincs.co.uk/Fire-Risk-Assessment/
Also see the LACoRS guide for let properties.

Q. What sort of smoke alarm system would I need to install for a HMO?
A.

BS 5839-6 recommends that one or two storey HMOs with an individual floor area of no more than 200sqm (not the total of both floors) should have a Grade D smoke alarm system installed. Grade D refers to mains powered smoke alarms with a back up battery power supply. The alarms can be interlinked either by wire or by radio signal and the system does not require a separate fire alarm panel. For HMOs of 3 storey or higher, a Grade A panel system would need to be installed. This can cover the whole of the building, or can be used just for the communal areas with a separate Grade D system installed for the individual dwellings. For both applications, the level of cover should be a minimum of LD3 (in all escape routes) but this may change according to the fire risk assessment.

Q. How long do smoke alarms last before needing replacement?
A.

It is recommended that smoke alarms are replaced after 10 years. This is because the sensors in the smoke alarms become less sensitive and may not activate when a fire is present.

Q. What is the best way to test my alarm?
A.

We recommend testing alarms by pressing the test button built-in to the unit, as this is designed to simulate the detection of the target stimuli (usually smoke, heat, or CO) at the alarm sensor. You should test your alarms regularly to ensure they are protecting building occupants, preferably every week. For more detailed guidance, check the manual included with your alarm.

Q. Can I put my smoke alarm on the wall, or must it be mounted on the ceiling?
A.

The best location to install your smoke alarm is in the centre of the ceiling rather than on the wall. During a fire, smoke initially rises and then spreads to the sides of the room. By installing the alarm on the ceiling, this ensures that you receive the earliest possible warning of a fire.

Q. Do I need an ionisation or optical smoke alarm?
A.

We recommend using an optical smoke alarm in hallways, as these are less likely to go off because of cooking fumes from a connected kitchen. Optical smoke alarms are also ideal for living rooms, dining rooms, bedrooms, as they are good at detecting smouldering fires from soft furnishings. For landings we recommend ionisation alarms. Heat alarms are designed for kitchens and garages. No alarms should be installed in bathrooms.

Key Product Features

Easy-to-use test and hush button central to the alarm

Powered by 2x AA batteries, included with the alarm

Bright status LED shows you that the alarm is powered on

Includes screws and rawl plugs for installation

Product Dimensions

What's Included?

  • 1 x FireAngel ST-625 Thermoptek alarm
  • 2 x AA batteries
  • 2 x Screws and rawl plugs
  • 1 x Instruction manual

Product Datasheets

Pricing & Availability

Model Stock 1 unit 2+ units 5+ units
Product Code: FAST625 Stock Level:
More than 20 in stock Expected dispatch: Today
1 unit:

£9.83 inc VAT

£8.19 ex VAT

2+ units:

£9.59 inc VAT

£7.99 ex VAT

5+ units:

£9.47 inc VAT

£7.89 ex VAT

Customer Reviews

94 customers have have given this product an overall rating of 4.8 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: P C

Easy to install. Not used it...yet!

Published on: 8th October 2019

Rating: 5 / 5 Stars

Reviewed by: J T

Bought. Delivered. Installed.

Published on: 28th July 2019

Rating: 4 / 5 Stars

Reviewed by: C K

Nice size

Published on: 13th June 2019

Rating: 5 / 5 Stars

Reviewed by: S D

Good product It does what it said it would and was delivered promptly with no problems.

Published on: 12th June 2019

Rating: 5 / 5 Stars

Reviewed by: C M

Cuprenol - does what it says on the tin

Published on: 20th May 2019

Rating: 5 / 5 Stars

Reviewed by: C T

neat, compact and aesthetically good.

Published on: 28th April 2019

Rating: 5 / 5 Stars

Reviewed by: I Y

Perfect

Published on: 20th March 2019

Rating: 4 / 5 Stars

Reviewed by: R W

Very easy to install

Published on: 4th March 2019

Rating: 5 / 5 Stars

Reviewed by: V B

Brilliant, no more alarms from cooking Very pleased with this alarm in fact I'm considering buying one for my son who's in rented accommodation and the alarm that was in his house has stopped working and you can't replace the battery which is not good so when I've got enough money I'll get one for him Good product

Published on: 4th March 2019

Rating: 5 / 5 Stars

Reviewed by: M C

Very satisfied

Published on: 26th February 2019

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Delivery Options

The following delivery options are available on this product.

Economy Delivery

£4.68 inc VAT - Orders will be delivered in 2-3 working days by Hermes

Next Working Day Delivery

£7.80 inc VAT - Orders will be delivered the next working day by Hermes

For dispatch today order within

Excellent Warranty

This product is supplied with a 5 year manufacturers warranty as standard

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