Gigahertz-Optik’s X1-3 Light Hazard Meter with the XD-45-HUV UV-Hazard Detector, XD-45-HB BLUE-Light Hazard Detector and XD-45-HB-SRT200 FOV & Distance Adapter fulfills safety requirements for a handy field-portable meter for product classification and light hazard assessment. Four-channel technology with an alphanumeric four-line backlit display allows the light meter to operate and read-out the two separate multi-sensor/filter detectors required to conform to IEC 62471 guidelines for both UV and Blue light hazard assessment. The hazard detector covers the full ACGIH/ICNIRP UV spectral effectiveness function using two sensor/filter/diffuser combinations, providing separate ACGIH UV-A (325 to 400 nm) and ACGIH UVC/B (250 to 325 nm) spectral responses for increased accuracy by reducing spectral mismatch errors. The multiple detector design ensures proper isolation between the ACGIH, UV-A and UV-C/B spectral regions—which is important when assessing UV-A rich sources. A third sensor UV-A (315 to 400 nm) is included for assessing eye hazard. The blue light hazard detector employs three filter sensors to cover the 300 to 700 nm spectral effectiveness range for blue light hazard. A fourth photometric sensor is included to establish the 500 lux reference distance for illuminance and/or radiance qualification. In addition, the XD-45-HB-SRT200 radiance adapter is supplied for product qualification measurements of blue light hazard at the recommended distance of 200 mm. The adapter mounts onto the front of the XD-45-HB detector head and offers two exchangeable aperture plates to form a 100 mrad and 11 mrad field of view. The sensors are mounted into a compact housing that connects to the X1-3 meter via a 2 m cable. Calibration is certified traceable to national standards.