The difference between illuminometer and luminance meter and how to choose?
An illuminance meter (or lux meter) is an instrument that specializes in measuring illuminance. It is to measure the degree to which the object is illuminated, that is, the ratio of the luminous flux obtained on the surface of the object to the illuminated area. The illuminance meter is usually composed of a selenium photocell or a silicon photocell with a filter and a microammeter, which are sold by Colbon Laboratories. A luminance meter is a measuring instrument for measuring light and color.
A luminance meter is one of the common instruments and equipment necessary for every chemical analysis laboratory. It is used to measure the "brightness" value of a luminous body (or reflector). The definition of luminance is: people's perception of the intensity of light. It is a subjective quantity, unit: candela/square meter.
Let me tell you how to choose a light meter:
1. The illuminance meter itself should be small in size and light in weight. Because the illuminance meter has many opportunities to be used, and the timing of use is often in different places, the first prerequisite for a portable illuminance meter is small size and light weight. It is most suitable to use the illuminance meter for illuminance control. The high-end professional illuminance meter is portable and can be carried around, which is convenient for you to use in different places. The digital LCD screen is convenient for fast and accurate readings.
Second, the illuminance meter should have high accuracy. Whether the illuminance meter is good or not has something to do with its accuracy. Of course, it is also closely related to its price, so it is necessary to buy a lux meter with high accuracy at a reasonable price. For places with relatively high illuminance requirements, you can choose a large-range illuminance meter, a high-end professional illuminance meter, with a super-large range up to 400,000LUX, and a selection of range gears, which can deal with strong light illuminance measurement. HT-8318 illuminance meter is a hand-held digital illuminance meter for professional photometric measurement, with an accuracy of ±0.5%, which meets the requirements of CIE spectral response. Automatic range setting, fast response, measurement speed 1.5 times/second, fast and accurate measurement of illuminance readings, this illuminance meter is cost-effective and is your first choice for measurement.
3. Cosine compensation - everyone should also pay attention to the brightness of the illuminated surface is related to the incident angle of the light source when selecting the illuminance meter. For the same reason, when measuring with a light meter, the incident angle between the sensor and the light source will naturally affect the reading value of the light meter. Therefore, whether a good illuminance meter has the function of cosine compensation cannot be ignored. The high-end professional illuminance meter adopts high-precision digital sensors imported from Switzerland, which have high integration, low power consumption, high test accuracy and high sensitivity, and can provide people with accurate measurement results.
