DT-1309 is easy to use with pocket size and light weight, providing accurate display light level in terms of Foot Candles (FC) or LUX over wide range. Just turning the Function Switch to select the "lux" scale and setting the range to desired range, then removing the photo detector to light source in a horizontal position and reading the illuminance norminal from the LCD display. When the measurement is completed, replace the photo detector from the light source.
Over-range indication
Long life silicon photo diode inside
Measurement rate:1.5 times per second