Low-energy-consumption semiconductor type gas sensor

Abstract

The invention provides a low-energy-consumption semiconductor type gas sensor, and relates to the technical field of sensor detection. The low-energy-consumption semiconductor type gas sensor comprises a gas extraction connecting pipe, the gas extraction connecting pipe is arranged in a tubular manner, a gas collection connecting pipe is arranged at the top of the outer wall of the gas extraction connecting pipe, the gas collection connecting pipe is annularly arranged, and a first gas inlet hole is formed between any end of the gas collection connecting pipe and the side wall of the gas extraction connecting pipe; a detection gas collecting pipe is fixedly connected between the side, away from the first gas inlet hole, of the outer wall of the gas extraction connecting pipe and the gas collecting connecting pipe in a penetrating mode, the side, close to the detection gas collecting pipe, of the gas collecting connecting pipe is conical, and the diameter between the sides away from the first gas inlet hole is large. According to the invention, the gas environment of the detected area can be centralized and concentrated, the detection gas content of the air in the detection area is increased, the detection is convenient, the detection of the detection gas in the designated area is more accurate, and the weak gas content can also be detected.

Description

technical field [0001] The invention relates to the technical field of sensor detection, in particular to a low-energy semiconductor gas sensor. Background technique [0002] A gas sensor is a converter that converts a certain gas volume fraction into a corresponding electrical signal. The probe head conditions the gas sample through the gas sensor, usually including filtering out impurities and interfering gases, drying or cooling the display part of the instrument. Semiconductor gas sensor is a gas sensor that uses semiconductor gas sensor as a sensitive element. It is the most common gas sensor and is widely used in combustible gas leakage detection devices in homes and factories. It is suitable for the detection of methane, liquefied petroleum gas, hydrogen, etc. The sensor is made by using the redox reaction of gas on the surface of the semiconductor to cause the resistance value of the sensitive element to change. When the work function of the semiconductor is smalle...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a low-energy semiconductor gas sensor, which solves the problem that weak gas content cannot be detected

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