Sampling probe for vehicle-mounted gas detector

Abstract

The invention relates to a sampling probe for a vehicle-mounted gas detector. The sampling probe comprises a probe filtering net, a probe heater and an inner air path, wherein the probe filtering netis positioned at the front end of the sampling probe, and the surface of the probe filtering net is of a concave-convex net-shaped structure; the probe filtering net is used for collecting a to-be-detected sample; the probe heater is positioned at the inner side of the probe filtering net, and is used for heating the sample collected by the probe filtering net; a through circular hole is formed inthe middle part of the circular section of the probe heater; the inner air path is arranged in the center circular hole of the probe heater, and extends out of one end of the probe heater. The sampling probe has the advantages that a stainless steel heating body is used as a main body, the heating device is used as the heating body to heat, and a temperature sensor is used for controlling the temperature within the proper range; a stainless steel filtering net is arranged in front of the probe, so that the probe not only can collect the air sample, but also can collect the stained non-volatile organic matters on the ground.

Description

technical field [0001] The invention relates to the technical field of sampling and detection, in particular to a sampling probe for a vehicle-mounted gas detector. Background technique [0002] The internal structure of the vehicle-mounted gas detector is relatively complex, so it is bulky and not easy to carry, and can only analyze gas samples, and is mostly used for laboratory analysis. If on-site sampling is required, special probes need to be manipulated to take samples from outside the vehicle. Since the gas samples detected by the detector are usually unknown and may be harmful to the human body, the sampling gas path of the vehicle-mounted gas detector is sealed and does not come into contact with the air in the car. Generally, the air pump and the detector are placed in the car, and The sampling probe extends out of the car, and finally the exhaust gas is discharged out of the car. [0003] The air pump takes the samples outside the car into the instrument in the ...

AI Technical Summary

Problems solved by technology

At present, the vehicle-mounted gas detector technology is still in its infancy, and there is no special supporting equipment on the market. Most of the existing probes are air sampling probes at room temperature, or high-temperature (400°C-600°C) mineral (inorganic substance) sampling probes. Less volatile organics are poorly sampled, which can damage some organics with weaker bonds

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