In the gas detection instrument, electrochemical principle sensor is mainly used. Generally, the detection of toxic gas is based on electrochemical principle sensor. The gases include: hydrogen sulfide, carbon monoxide, ammonia, sulfur dioxide and other toxic gases.Therefore, we should clearly understand the electrochemical principle of the detector, pay attention to the problems in the use, so that we can use correctly to avoid any unnecessary losses.
First of all, let's learn the main structure of the gas sensor. The electrochemical sensor mainly consists of diffusion column, sealing ring, reference electrode, induction electrode, pair electrode, and electrolyte.It is easy to find that there is an very important role: the electrolyte. Since it is liquid, it will be dry, so it has a certain time of service life. There is also a specific inventory time, so it can not be stock too long time. So we when selecting a gas detector, expecially electrochemical sensor detector, we must pay attention to the date of production, avoid using shorter service time.
By the way, why some buyer feedback that they never use the gas detector after bought they just put it in stock, but there is no detection response when they use after a long time.That because the electrolyte failed and dried up naturally
Electrochemical gas sensor, especially to avoid large humidity, high temperature and high humidity and low humidity environmental conditions, which will reduce the electrolyte.Therefore, we should pay attention to the change of good environmental working conditions in use.Otherwise, the terrible environment will quickly end the sensorr life.In addition, high concentration of gas can also cause damage to the electrolyte.For example, our detector chooses the measurement range of 500ppm. Our measured gas is often around 400ppm, or the high concentration beyond the measurement range will lead to the rapid consumption of the electrolyte in the sensor, which will greatly shorten the use time.Under long-term high concentration the sensor could worke for 2 years. If a gas detector has continuous concentration over 60% of the range,it will cause the gas sensor to fail rapidly, maybe only 1-2 months service time.Therefore, we should pay attention to that whether the gas range and concentration are appropriate, especially the gas detector that requires long-term exposure to the electrochemical principle of the measured gas.Pay attention to the selection of gas sensors that may cause short-term damage to the detection.