Extech 401025-NIST, Foot Candle/Lux Meter with NIST Certificate - 401025-NIST
Foot Candle/Lux Meter with NIST Certificate - more info check here: http://www.buymeasuringtools.com/Extech-401025-NIST-Foot-Candle-Lux-Meter-with-NIST-Certificate-10147967/