Biral ALS-2 Ambient Light Sensor

ClimateMeteorological Station & Sensors

The ALS-2 Ambient Light Sensor is designed to measure background luminance as part of a Runway Visual Range (RVR) 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.

Quantity

Overview

Designed to FAA and ICAO requirements
2 to 40,000 Cdm^-2 measurement range
Choice of serial digital or analogue outputs
Simple and quick in field calibration
Direct connection to Biral visibility and present weather sensors
Extensive self-test capabilities
-60°C to 70°C operating range

Specification

Measurement	Background luminance 2-40,000 Cdm-2 (0.5-11,700 fL)
Serial Output	RS232, RS422
Analogue Output	Optional - 2 x Analogue outputs
Spectral Response	Wavelength sensitivity range 420-675 nm, peak 565 nm. Analogous to CIE luminous spectral efficiency
Measurement Error	<10%
Field of View	6°