BK8331 Digital 3 1/2 LCD light meter. Accurate photo diode sensor. Measures light in Lux & fc. Quick response light sensor Digital Light Meter Model BK8331 Features: 1)CE-Mark approval 2)Portability and simplicity one-hand operation 3)Accurate photo diode sensor 4)Measures light in Lux & fc 5)Quick response light sensor 6)PEAK & HOLD function 7)Backlight Applications: 1)Indoor 2)Office environment 3)Labs 4)Environment studies Specifications: Display: 3½ digit liquid crystal display (LCD) with a maximum reading of 1999. Low battery indication: The " " is displayed when the battery voltage drops below the operating level. Measurement rate: 2.5 times/second. Operating environment: 0°C to 50°C, <70% R.H.. Storage environment: -20°C to 60°C, 0 to 80% R.H. with battery removed from meter. Accuracy: Stated accuracy at 23°C±5°C, <75% R.H.. Dimensions: 190mm(H) x 65.5mm(W) x 35mm(D). Weight: Approx. 210g. (including probe and battery) Sensor: Silicon photodiode Range: 20lux, 200lux, 2000lux, 20Klux, 20fc, 200fc, 2000fc, 20Kfc Resolution: 0.01lux, 0.01fc Total Accuracy For Source A 2856K: ±(3% rdg ± 10 digits) BK8331 Bokles Light meter Lux meter à¤Ã×èͧÇÑ´¤ÇÒÁà¢éÁáʧ à¤Ã×èͧÇÑ´áʧ