G. Ph. SECURITY & CONTROLS

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NX-491-I
Wireless smoke detector with self diagnostic
Overview

The NX-491-I is a wireless photo-electric smoke sensor with a built-in sensitivity meter monitoring continually its own operational status and provides a visual trouble condition if it drifts out of the sensitivity range or fails internal diagnostics.
The alarm sensitivity level can be determined at the alarm without a meter.
Built-in drift compensation, usually only available in analog systems, allows the alarm to adjust automatically its sensitivity over time as it becomes dirty. This feature dramat- ically increases the time between cleanings and reduces false alarms.
A built-in 85 dB temporal sounder is ideal for residential installations and other occupan- cies where people are sleeping.
Once a day and immediately upon the first power up, the alarm performs a full diagnos- tic test that includes a dynamic test of the sensing chamber and internal electronics.
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