FEATURE ● Intensity of ultraviolet can be read directly in ｍｗ/ｃ? directly. ● Sensor of light receiver is light and small . So, that measure at optional position may available. ● When sensor connector is pull out, power circuit is cut off to prevent consumption of built-in battery. ● If "Light" switch is pressed ON, the light at display area is lit then, the value can read even　in darkroom.