Illuminometer (also known as Lexometer) is a specialized instrument for measuring luminosity and brightness. It consists of a host and a light sensor, with a measurement range of 0-50000. The average indoor light intensity ranges from 100-1000lux, while the outdoor sunlight intensity is approximately 50000lux. Lux is a unit of illumination that represents the density of light shining on the surface. Its main applications are indoor, office, laboratory, and environmental research.

Illuminometer - Principles of Illuminometer Measurement

Photocell is a photoelectric element that directly converts light energy into electrical energy. When light strikes the surface of a selenium photocell, the incident light passes through the metal film 4 and reaches the interface between the semiconductor selenium layer 2 and the metal film 4, generating a photoelectric effect at the interface. The magnitude of the generated photocurrent is proportional to the illumination on the surface of the photocell. At this point, if an external circuit is connected, a current will pass through, and the current value will be indicated on the microampere meter with a scale of Lx. The magnitude of photocurrent depends on the strength of the incident light. The illuminometer has a shift device, so it can measure both high and low illuminance. Types of illuminometer: 1. Visual illuminometer: inconvenient to use, low accuracy, rarely used 2. Photoelectric illuminometer: commonly used selenium photocell illuminometer and silicon photocell illuminometer

Illuminometer - Type of illuminometer:

1. Visual illuminometer: inconvenient to use, low accuracy, rarely used

2. Photoelectric illuminometer: commonly used selenium photocell illuminometer and silicon photocell illuminometer

1. Composition: microampere meter, shift knob, zero adjustment, wiring post, photocell, V（ λ) Correct the composition of filters and other components.

2. Usage requirements: