AMBIENT LIGHT SENSOR
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ALS-2 AMBIENT LIGHT SENSOR ALS-2 Ambient Light Sensor Measures Background Luminance in accordance with FAA and ICAO guidelines for use in Runway Visual Range (RVR) applications … direct connection to Biral visibility and present weather sensors and field calibration simplify system design and reduce maintenance costs Designed to FAA and ICAO requirements Choice of serial digital or analogue outputs Simple and quick in field calibration Direct connection to Biral visibility and PW sensors Extensive self-test capabilities 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 a Biral 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. The ALS-2 Field Calibrator accessory simply fits over the hood and communicates with the sensor using an IR link through the optical window. The calibration can be checked and adjusted in a matter of minutes without the need for specialist staff or laboratory equipment. 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. Biral have been manufacturing and supplying worldwide high specification Visibility and Present Weather Sensors since 1997. The ALS-2 Ambient Light Sensor is designed to measure background luminance as part of a of Runway Visual Range system. Mounted alongside the runway the ambient light sensor is often deployed with a visibility meter to provide the data necessary for calculation of RVR. email: met@biral.com

ALS-2 AMBIENT LIGHT SENSOR ALS-2 Specifications Ambient Light Measurement Luminance (ambient light) Serial data. Optional analogue outputs Measurement range: Serial data Analogue outputs Resolution: Serial data Analogue outputs Operating temperature With extended heating Operating humidity 2-40,000 Cdm (0.5-11,700 fL) -2 2-4,000 Cdm Low output -2 20 - 40,000 Cdm High output Protection rating Certification & Compliance CE certified 2 Cdm -2 2 Cdm Low output -2 10 Cdm High output EMC compliance with EN61326-1997, 1998, 2001 RoHS and WEEE compliant Measurement error Spectral response...