Gas chamber for poison gas detection sensor in laboratory and detection method

Abstract

The invention relates to the field of sensor detection equipment, in particular to a gas chamber for a poison gas detection sensor in a laboratory and a detection method. The first aspect of the invention provides a detection method of a gas sensor for detecting macromolecular toxic agents in a laboratory, which comprises the following steps: pretreatment: carrying out impurity removal and purification treatment on to-be-detected gas; and detection: detecting the to-be-detected gas by the gas sensitive element. A second aspect of the invention provides a gas chamber for a gas sensor for detecting macromolecular toxic agents in a laboratory, comprising: a cavity comprising a gas inlet, a first gas outlet and a second gas outlet; the first filter membrane is arranged at the first air outlet;the first filter membrane is used for filtering out air micromolecules and intercepting toxic agent gas macromolecules; impurity removal and purification can be performed on gas to be detected, so that the workload of a gas sensitive element is reduced, the influence of dust, water vapor and the like on a detection result and the damage to the gas sensitive element are eliminated, and the accuracy and the service life of the sensor are improved.

Description

technical field [0001] The invention relates to the field of sensor detection equipment, in particular to a gas chamber and a detection method used for a gas sensor for detecting and detecting poison in a laboratory. Background technique [0002] A gas sensor is a sensor used to detect gas concentration and composition. It converts the gas type and its concentration-related information into electrical signals. According to the strength of these electrical signals, it can obtain information related to the presence of the gas to be measured in the environment. information, so that it can detect, monitor, and alarm; it can also form an automatic detection, control, and alarm system through an interface circuit and a computer, which plays an extremely important role in environmental protection and safety supervision. In the prior art, gas sensors can be used to detect toxic and harmful gases, the common ones are CO, CO 2 , NO, NO 2 , NH 3 , SO 2 、CH 4 , O 3 etc. It can als...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the macromolecular poison gas detection sensor has no selectivity for the gas to be detected, and all the drawn in foreign gases flow through the gas sensor, which brings a great burden to the identification work of the gas sensor and affects the sensor's performance. Sensitivity, Response Time and Accuracy

Some large particles may even cause damage to the sensor, especially when the sample humidity is high, it may even cause damage to the semiconductor sensor

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