The ALS-2 is designed to provide an accurate and reliable determination of the amount of background light during all weather conditions.
Designed to comply with specifications and guidelines produced by ICAO, WMO and the Federal Aviation Authority in the USA, the ALS-2 meets all the requirements for use in typical RVR systems. The ability to connect the sensor directly to visibility or present weather sensor and have
the background luminance data incorporated into the visibility sensors data string simplifies system design and construction.
Available with a choice of serial data or analogue outputs the ALS-2 can be used to replace a wide range of background luminance meters in both legacy and new installations. The simple pole mounting system even incorporates an angular scale to ease installation. A unique feature of the ALS-2 is its ability to be calibrated in the field without the need to disconnect the cable or send commands via the software interface.
Designed to operate in the harshest of weather the ALS-2 has window heating and window contamination adjustment as standard. Extensive self-test capabilities and optional heating complete the package.