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Sale! Wireless Smart Alarm PIR (passive infra-red).

Internal PIR for the Wireless Smart Alarm

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Internal Wireless Smart Alarm PIR, detects people from up to 15 metres distance & 110 degrees angle, with a wireless transmission range of 150 metres (line of sight) back to the Control Panel.

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£ 19.95

(including 20% VAT)

£ 26.99

-£ 7.04

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Internal Wireless Smart Alarm PIR, detects movement from people from up to 15 metres distance & 110 degrees angle, together with a wireless transmission range back to any of the Smart Control Panels of 150 metres (line of sight).

Powered by a single PP3 battery (supplied) and supplied with a fully adjustable mounting bracket.

The battery will operate for between 12 - 18 months in most applications (depending on use) and has a built in low battery warning (a slow flashing red LED on the PIR) allowing for suitable battery replacement. The built in power saving technology puts the PIR into hibernation for 3 minutes after each activation. 

There is no limit to how many additional PIR's can be added to our range of Wireless Smart Alarms.

Mounting the PIR Sensor:
The key to successful operation of any PIR sensor is choosing the correct location. A sensor mounted in a unsuitable location has the potential to cause false triggers and reduce performance. The main rules that should be followed are:
1) Mount the PIR into a corner of a room.
2) Avoid heat spots from bright lamps suddenly turning on or off.
3) Do not install immediately above a radiator.
4) Do not install in a glass roof conservatory.

Need Advice on choosing the best System for your personal application or Help after you have Purchased one, then please contact

us by:

Telephone: We are still available in the old fashioned way, give us a call on 01604 589414 or 01604 758438 to talk to a real person, we are happy to give you Friendly, No Obligation advice (lines open 8am to 5.30pm Monday - Thursday, 8am to 5pm Friday).

Email: If you don't have time to call us, then send us an email to

Personal Visit: Some customers find it far easier to come and meet us for a Friendly, No Obligation Consultation (click here for full details).

  • 1 x PIR
  • 1 x Mounting Bracket.
  • 1 x PP3 Battery.
  • 1 x Set of Screws.
  • Frequency: 868 Mhz.
  • Detection Distance: adjustable from 4 - 6 - 15 metres.
  • Detection Angle: 110 Degrees.
  • Power Supply: 1 x PP3 Battery.
  • Transmission Range: 150 metres (line of sight).
  • Mounting Method: Adjustable Wall Bracket (using 2 screws).
  • Power Saving: Yes (set to 3 minutes between activations).
  • Low Battery Warning: Yes (low flashing red LED when the battery is needing replacement).

PIR (passive infra-red detector)

All PIR sensors detect changes in infra-red radiation, in the form of heat emitted by a number of bodies including people, cars and to a lesser extent, dogs or other small animals. The bigger the body, the more infra-red radiation isemitted and the easier it is for a PIR sensor to detect.

If you imagine the images shown on television of a Police Helicopter following a suspect in the pitch black using night vision technology or a Soldier looking through night vision binoclulars in the middle of the night, this is exactly how the PIR is working.