A wide range nitric oxide sensor system

Abstract

The invention provides a wide-range nitric oxide sensor system. The device comprises a main control board, an ozone generator, a reaction chamber, a sampling pump, an ozone regulator and an ozone detector, one end of the ozone generator is connected with a dry air pipeline through a pipeline; a fan is arranged beside the ozone generator; one end of the ozone generator is connected with the reaction chamber through an air resistor; the reaction chamber is also connected with a sample gas pipeline through another gas resistor; the ozone generator is in data connection with the temperature sensor, the ozone regulator and the ozone detector; compared with the prior art, the device has the following beneficial effects that the measurement range is increased, the application field is not limitedto the fields of atmospheric environment detection and laboratories, and the device is suitable for more fields such as motor vehicle tail gas measurement and ship tail gas measurement.

Description

technical field [0001] The invention relates to a large-range nitric oxide sensor system, which belongs to the field of sensor equipment. Background technique [0002] At present, NO sensors using chemiluminescence are mainly used in low-concentration detection applications, such as air, flue gas, etc. The measurement range of sensors for such applications is usually at the ppb level, and the larger ones are less than tens of ppm. According to the measurement principle of NO (nitric oxide) measured by chemiluminescence method, it can be known that the ozone participating in the chemical reaction is easy to be excessive in the detection of such a low concentration, thus avoiding the problem that the change of ozone concentration affects the measurement results. If the chemiluminescence method is used to measure high-concentration NO (nitrogen monoxide) gas, because the ozone concentration cannot be excessive, and the ozone output of the ozone generator is affected by many fac...

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Problems solved by technology

If the chemiluminescence method is used to measure high-concentration NO (nitrogen monoxide) gas, because the ozone concentration cannot be excessive, and the ozone output of the ozone generator is affected by many factors such as ambient temperature and humidity, the result of high-concentration measurement is affected by environmental factors. huge influence

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