Std PIR for the WG GSM Wireless Alarm.

Standard Battery Powered Wireless PIR's, designed to work with all of our WG Wireless GSM Alarm Systems, they have a 10 metre & 110 degrees detection pattern and a wireless range back to the receiver of 80 metres (line of sight).

You can learn the PIR's into the 100 available wireless alarm zones on the impressive WG 'Touch' Wireless GSM Alarm System (each working in a selection of different ways to suit most applications).

• 1 x Wireless PIR.
• 1 x Mounting Bracket.
• 1 x Battery.

• Size of Wireless PIR without Bracket: 110 (H) x 60 (W) x 45 (D) mm.
• Size of Wireless PIR with bracket: 110 (H) x 60 (W) x 70 (D) mm deep.
• Detection Range:10 metres Distance.
• Detection Angle: 110 Degrees.
• Power Suppy: 1 x PP3 Battery.
• Battery Life: Approximately 6 - 12 months (normal use).

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.

How PIR's Work (passive infrared 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.
The field of view is the area in which changes in infra-red radiation can be detected. The field of view can alter with changes in temperature and the size of the heat source.
The construction of the PIR and Fresnel Lens divide the field of view into a number of zones both vertically and horizontally.