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10 Year Longlife Battery Heat Alarm - Ei603

Available to order Expected dispatch: 9th Jul
£47.27 inc VAT
£39.39 ex VAT
Product Overview

The Ei603 heat alarm detects fire by sensing the rise in temperature of its surroundings rather than sampling the air, and its sealed 10 year lithium battery means the alarm will continue to provide continuous detection without the need to regularly replace its batteries. By detecting heat instead of smoke the Ei603 will not suffer nuisance alarms caused by large amounts of dust, cooking fumes, and steam as traditional smoke alarms would, making this alarm suitable for the loft, kitchen, or garage.

  • Battery: Built-in lithium battery
  • Warranty: 5 year warranty
  • Red LED status indicator – flashes every 40 seconds during normal operation
  • Simple twist-on base design for easy installation
  • Screw fixings supplied, optional adhesive pad can be added before checkout
  • Suitable for installations complying to BS 5839-6: 2019 Grade F1
  • Self-test performed every 16 seconds
  • CE Marked and Kitemarked to BS 5446-2: 2003
Technical Data

Technical Data

This is the technical data for the 10 Year Longlife Battery Heat Alarm - Ei603.

Product Code EI603
Alternative Product Codes EI603, Ei603, Ei603C, Ei603C-D, Ei603TYC, Ei603TYC-D
Weight 0.20kg
Sensor Type Thermistor - activates at 58°C
Dimensions (HxDia) 55x115mm
Battery Type Sealed 10 Year Lithium
Sound Output 85dBA at 3 meters
Temperature Range Operating: 0°C to +40°C
Storage: 0°C to +35°C
Humidity Range 15% to 95% Relative Humidity

Product Datasheets

The following datasheets are available for this product.

FAQs (9)
Q. What smoke alarm should I use in a bedroom with an en suite bathroom?

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?

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

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

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.
Also see the LACoRS guide for let properties.

Q. How are smoke alarms fitted to the ceiling?

Smoke alarms can be either screwed to the ceiling using the holes on the base plate (screws provided) or fixed using a sticky pad, this can be added to your basket through the ordering process.

Q. Do the Ei600 series alarms need 230v or do they just use battery?

The Ei600 series of radio-interlinked alarms are completely battery operated. This means that they do not need to be wired up to the mains circuit. On the website, we offer the Ei600 series with a standard 9v battery or with a 10 year lithium longlife battery. The standard 9V batteries last approximately 12-18 months depending on how often the detectors are tested. The lithium battery units are sealed and last 10 years i.e. the full lifespan of the detector.

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

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. Would the Ei600 series be suitable for installation in flats? The system needs to be grade A or grade D.

The Ei600 series does not conform to grades A & D, it conforms to grade F, relating to battery operated interlinking smoke detection. Both grade A and grade D systems relate to mains powered interlinking alarm systems. The alarms that would be suitable for your application are the Ei140 series and the Kidde Firex.

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

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

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.

Pricing & Availability

Model Stock Price
Product Code: EI603 Stock Level:
Available to order Expected dispatch: 9th Jul

£47.27 inc VAT

£39.39 ex VAT

Delivery Options

The following delivery options are available on this product.

Economy Delivery

£4.68 inc VAT - Orders will be delivered in 6-8 working days by Hermes

Expedited Delivery

£7.80 inc VAT - Orders will be delivered in 4-5 working days by Hermes

Looking for more information?

If you have any questions or would like more information about this product you can ask one of our specialists.

Direct Telephone 01507 464181


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