Ozone is 1 widely used gas, which exists in many industries, such as chemical, medical and pharmaceutical clean rooms, so it is necessary to detect the concentration of ozone in the environment. The ozone detector is currently mainly used for continuous detection of ozone gas in various industrial environments, and can also be used to detect the 1 gas detection of ozone gas in the environment such as pipelines and containers in operation. So do you know how the ozone detector works? The following is a brief introduction by yi yun Tian:

The working principle of the ozone detector:

1, electrochemical method

electrochemical method is the method of diffusion or pumping of the measured ozone gas and instrument contact, and react. Output a stable electrical signal. The gas concentration value can be stably displayed on the display screen with data. This method is simple and convenient to detect ozone, and can be measured as you take it.

2, ultraviolet absorption method

ozone detector adopts the principle of ultraviolet absorption method and uses stable ultraviolet lamp light source to generate ultraviolet rays, use a light wave filter to filter out other wavelengths of ultraviolet light, allowing only the wavelength of 253.7nm to pass. After the sample photoelectric sensor, and then through the ozone absorption cell, to reach the sampling photoelectric sensor.

the ozone detector uses the principle of ultraviolet spectrophotometry to measure ozone. when the air sample enters the gas path system of the instrument at a constant flow rate, the sample air alternately or directly enters the absorption tank or enters the absorption tank after passing through the ozone scrubber. ozone has a positive effect on 254nm The wavelength of ultraviolet light has a characteristic absorption, zero air sample, the light intensity detected by the light detector when passing through the absorption cell is I0, the light intensity detected by the light detector when the ozone sample passes through the absorption cell is I, and I/I0 is the light transmittance. After each cycle, the micro-processing system of the instrument calculates the concentration of ozone according to Lambert-Beer's law.

In summary, it is the working principle of the ozone detector. In fact, the principle of ozone concentration is to use chemiluminescence, ultraviolet absorption and electrochemical method. However, due to the chemiluminescence method must be equipped with ethylene cylinders, ethylene is combustible, both dangerous and inconvenient, so in recent years, the commonly used ultraviolet absorption method and electrochemical method.