The HT309 is a digital precision lux meter, which is mainly suitable for measuring the illuminance of both white light sources and LED sources of different colors, which is expressed in lux (Lx) or foot candle (Fc). The device complies with the CIE (International Lighting Commission) standards on the spectrum response and corrects for the cosine of the angle of incidence of the light. The silicon photodiode sensor guarantees measurement stability.
Due to the lack of appropriate filters, simple lux meters are not very suitable for measuring the brightness of a light source as perceived by the human eye. They are designed to set the correct exposure for cameras, for example - communication from electronics to electronics or mechanics. To measure light sources in the visible range between 380 and 780 nm and the brightness at workplaces, much more complex lux meters are required, which have a built-in filter that takes the brightness perception of the human eyes into account (pupil-lumen measurement).
The HT309 meets the IES requirements for measuring the brightness of all light sources emitting in visible light. This means that the brightness of different light sources, such as LED lamps, incandescent lamps, fluorescent lamps, HQI, HQL or other light sources, can be measured and compared.
This luxmeter HT309 is a must for everyone who wants to measure and compare the correct brightness of light sources (e.g. at the workplace, in the warehouse or warehouse, in the office or at home). The HT309 offers 10 user-adjustable correction factors (for the LED types), 99 memory locations, peak hold function and automatic switch-off after approx. 5 minutes
The sensor of the HT309 is connected to the instrument via a connecting line and can be used in a variety of ways for the precise measurement of light intensity.