Poison gas sensor selection method

Poison gas sensor is a kind of commonly used testing instruments, is the concentration of harmful gas in the air can be converted to electrical signal device, has high sensitivity, good selectivity, low concentration as well as good output linear. Today, engineering is mainly to introduce poison gas selection skills, hope can help users better application products. Have a poisonous gas sensor

overview

poison gas sensor is mainly used for detection of flue gas, the pollution of the environment gas such as exhaust gas, waste gas, the most application is constant potential electrolysis type electrochemical gas sensors. Is characterized by high sensitivity, good selectivity, low concentration linear output is good, can be used for industrial hygiene of stationary or portable gas monitor, flue gas monitoring, monitoring equipment used for vehicle emissions.

poison gas sensor selection techniques

the harmful gas detection of gas sensor is one of the great role, there are two purposes of harmful gas detection, the first is the blast, the second is a poison. The blast is testing for the dangerous sites combustible gas content, excessive alarm, in order to avoid the happening of explosion accident; Poison is to detect the contents of toxic gases for the dangerous sites, excessive alarm, in order to avoid poisoning.

there are three kinds of harmful gas situation first, non-toxic or low toxic, flammable, the second, not toxic, third, flammable and poisonous. In the presence of these three different, generally we choose sensors need to choose a different gas sensor. Blast choose combustible gas detection alarming device, for example, measuring the poison choose toxic gas detection alarming device, etc. Second we need to choose the type of gas sensor, generally have fixed and portable. Long run the position of production or storage of leak detection choose fixed gas sensor; Like other access detection, emergency detection, detection and circuit selects the portable gas sensor, etc.

there are hundreds of thousands of kinds of gas sensor type according to different selection of gas sensor may have different skills, customer in choosing a gas sensor if you are not very clear can consult sensor manufacturers of technical personnel, let them for you to choose the appropriate gas sensors, or ask sensor technology to the above survey in order to better choose gas sensor.

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key words: thermal resistance, thermocouple, thermal resistance, platinum resistance, PT100, PT1000, pressure sensor and digital temperature sensor