Volumetrics are in a way the eyes and ears of your alarm system. There are several different detection techniques: Passive infrared detector (PIR): this type of detector senses all warm body movements. The detector transmit infrared rays and triggers the alarm when one or more of these beams are broken. The IRP is a PIR detector which can be used in conjunction with any domestic or commercial premises security system. Designed to be mounted on the ceiling, it covers a 113° conical zone. This means that the surveillance zone covers a circle of: - 11m diameter when the detector is fixed at a maximum height of 3,60m - 7,5m diameter when it is fixed at a height of 2,5m It uses pulse count technology to avoid false alarms and there is an indicator light built into the sensor. Alarm and anti tamper outputs on NC relay.

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