A gas sensor calibration container that can be sealed

Abstract

The invention discloses a gas sensor calibration container capable of being sealed. The gas sensor calibration container comprises a main cavity body, a left side cover plate and a right side cover plate. The main cavity body is provided with a pressure sensor and a gas sensor; the left side cover plate and the right side cover plate are fixedly connected with the main cavity body through bolts and elastic sealing rings in a sealed mode. The cross section of each elastic sealing ring is in a U shape, and each U-shaped cross section comprises a slope, an arc-shaped face and a U-shaped groove. The matching face of the left side cover plate and the main cavity body and the matching face of the right side cover plate and the main cavity body are provided with second bosses and grooves respectively. The two end faces of the main cavity body are provided with first bosses and grooves respectively. The slopes of the elastic sealing rings can be matched with the first bosses in a sealed mode. The U-shaped grooves of the elastic sealing rings can be matched with the second bosses in a sealed mode. The tail end of a gas outlet pipeline is connected with a recovery bottle. By the adoption of the structure, sealing performance and abrasion resistance are good, poor sealing can be found in time, and the container is more suitable for calibrating low-concentration gas and poisonous gas.

Description

technical field [0001] The invention relates to an auxiliary device for producing and using a gas sensor, in particular to a gas sensor calibration container that can be sealed. Background technique [0002] Measuring the concentration of a substance with a sensor generally utilizes the correlation between the sensor response value and the concentration of the substance to be measured. The zero point and sensitivity of the sensor will inevitably drift during use. In order to obtain more accurate measurement values, it is generally required to calibrate the sensor before measurement. [0003] Calibration needs to measure the sensor with a standard substance of known concentration. For liquid and solid substances, it is relatively easy to obtain the concentration of the standard substance. Generally, it can be done by weighing with an analytical balance in the laboratory and constant volume with a volumetric flask. [0004] The gas calibration basically uses the value genera...

AI Technical Summary

Problems solved by technology

However, when sealing the left cover plate, right cover plate and the main cavity, sealing rings are mainly used. Commercially available sealing rings have small elasticity and poor wear resistance. After a period of use, they are easy to wear or age. Or after aging, it is not easy to detect, it is easy to cause poor sealing performance of the calibration container, easy to leak, not suitable for calibration of low-concentration gases and toxic gases

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