Types of Lux Meters and Purchase Guide

Types of Lux Meters and Purchase Guide

Types of illuminance meters:
1. Visual lux meter: inconvenient to use, low accuracy, rarely used

2. Optoelectronic lux meter: commonly used selenium photovoltaic cell lux meter and silicon photovoltaic cell lux meter

Types of illuminance meters

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

2. Optoelectronic lux meter: commonly used selenium photovoltaic cell lux meter and silicon photovoltaic cell lux meter

Composition and usage requirements of photovoltaic cell illuminance meter:

1. Composition: microampere meter, shift knob, zero adjustment, terminal block, photovoltaic cell, V (λ) correction filter, etc.

Commonly used selenium (Se) or silicon (Si) photovoltaic cell illuminance meter, also known as lux meter

2. Usage requirements: The probe of the illuminance meter is made of glass material, which is prone to breakage and damage, and the waterproof effect is poor when used

① Selenium (Se) or silicon (Si) photovoltaic cells with good linearity should be used for photovoltaic applications; Long term work can still maintain good stability and high sensitivity; When using high E, choose photovoltaic cells with high internal resistance, which have low sensitivity and good linearity, and are not easily damaged by strong light irradiation

② Equipped with a V (λ) correction filter, suitable for illumination with different color temperature light sources, with small errors

③ The reason for adding a cosine angle compensator (milky white glass or white plastic) in front of the photovoltaic cell is that when the incident angle is large, the photovoltaic cell deviates from the cosine rule

④ The illuminance meter should operate at or near room temperature (the drift of the photovoltaic cell changes with temperature)

Illuminometer is a specialized instrument for measuring luminosity and brightness, and illuminance is closely related to people's lives. Adequate lighting can prevent people from accidents. On the contrary, excessively dim light can cause fatigue in the human body to a much greater extent than the eyes themselves. Therefore, uncomfortable or poor lighting conditions are one of the main causes of accidents and fatigue.

There are many models of illuminance meters on the market, and users often have no idea which model is suitable for their own use when purchasing. How to choose an illuminance meter? In fact, as long as you choose products from legitimate manufacturers, there is no problem. Generally, the following points should be noted:

1. It must be easy to carry, as there are many opportunities to use an illuminance meter and it is often used in different places. Therefore, a portable illuminance meter with small volume and light weight can maximize work efficiency.

2. High accuracy is necessary to provide professional data reference for oneself.

3. Measurement range, high light measurement, choose a large range lux meter. Generally, on the market, a large range can detect up to 400000 Lux, meeting the needs of high light detection. Low light measurement, such as darkroom illumination detection, requires the use of a low light illuminance meter, which can detect a minimum of 0.0001lux

4. Illuminometer is an instrument with highly sensitive photosensitive components. Therefore, if the user needs to obtain a metrological verification certificate, it is advisable to choose a reputable manufacturer to produce the product, which can minimize the occurrence of unqualified returns.