Luxmeter

Photometer (English photo “light” and Greek μετρέω – to measure) is a device for measuring the amount of light energy passing through a translucent body and causing it to emit photoelectric current in the device’s receiver. That is, a photometer is a device for measuring the luminous flux of radiation using instruments. .According to the spectral properties of radiation, photometers are divided into black-and-white photometers, photocolorimeters for measuring the integral photometric characteristics of a substance, photometric colorimeters, selective photometers and photocells for UV spectral analysis, etc. The operating principle of photometers is based on the conversion of radiation energy into other types of energy or the transfer of light energy into electrical signals. The photometer measures the light-and-shadow characteristic of a photocell, which changes when a light flux hits the photocathode - the optical phenomena of interference, diffraction, polarization and nonlinear optics are recorded. Photometric receivers can detect radiation, thermal, electromagnetic and chemical radiation.

**Luxmeter** is a device for general measurements (used in lighting engineering) to determine the amount of light in the environment. The determination is based on comparing the level of illumination from which the unit measures with a certain standard. The standard is selected in such a way that it can be perceived absolutely normally at the time of measurement. For comparison with the standard, the device has a special light source of a certain level. Distinctive features of the lux meter: * the design is located in the same housing with portable data storage devices from different manufacturers; * availability of scoreboards and settings; * control of measurement processes using an indicator or light signals; * automatic calculation of digital values