Jäger HT-309 Digital LED Luxmeter, HT-309 Digital LED LED Luxmeter with Pupil lumens measurement for measuring light from LEDs. Simple light meter are lack of appropriate filter very suitable to measure the perceived by the human eye brightness of a light source. They are designed to, e.g. set the correct exposure for cameras - a communication from electronics to electronics or mechanics. For measuring light sources in the visible range 380-780 nm and the brightness of jobs will require far more complex lux meter, which have a built-in filter, the brightness sensitivity of the human eye into account (Pupil lumens measurement). The HT309 meets the requirements of IES to measure the brightness of all light sources emitting in the visible light. Thus, now easily perceived by the human brightness of different light sources such as LED bulbs, incandescent, fluorescent, metal halide, HQL or other light sources are measured and compared. This lux meter HT309 is a must for anyone who wants the correct brightness of light sources (eg at work, in the warehouse or department store, in the office or at home) to measure and compare. The HT309 offers 10 user-adjustable correction factors (for the LED types), 99 presets, peak-hold function and auto power off after 5 minutes. HT309 from the sensor is connected via a connecting line to the instrument and move freely to the accurate measurement of light intensity versatile. to measure the light intensity, LCD, 5 cts, 2000 points, range: 0.01 to 400 klux, measurement gives: Class A JIS C 1609:1993 + CNS 5119, Measurement rate: 2.5 times per second, Dimensions: 130 x 55 x 38 mm (L x W x H), weight: 170 g, supplied with battery and carrying case