Alcohol detector type and use Note

The alcohol detector is a law enforcement inspection tool specially designed for the police and effectively reduces the occurrence of major traffic accidents. The Instrument World World Network now points out the type and use of alcohol detectors for everyone to learn.

Alcohol Detector Types and Usage Note
There are five basic types of equipment for testing the alcohol content of gases in alcohol detectors: 1, fuel cell type (electrochemical) 2, semiconductor type 3, infrared type 4, gas chromatography type 5, colorimetric type Due to factors such as price and ease of use, only fuel cell type (electrochemical type) and semiconductor type are widely used at present. These two types can be manufactured into a portable breath alcohol tester suitable for field use. The semiconductor type uses a tin oxide semiconductor as a sensor. Such a semiconductor device has gas sensitivity characteristics. When the concentration of sensitive gas in the contact gas increases, the external resistance value thereof decreases, and the semiconductor type breath alcohol tester utilizes this principle. Made of.

This semiconductor has different sensitivity to different gases at different operating temperatures. Therefore, a semiconductor-type breath alcohol tester uses a heating element to heat the sensor to a certain temperature. At this temperature, the sensor is applied to alcohol. Has the highest sensitivity. The fuel cell type breath alcohol tester uses a fuel cell alcohol sensor as a gas sensor, which belongs to the electrochemical type and is also called an electrochemical type. The fuel cell is an environmentally friendly energy source that is currently being extensively researched around the world. It can directly convert flammable gas into electrical energy without causing pollution. Being an alcohol sensor is just a branch of the fuel cell. The fuel cell alcohol sensor uses precious metal platinum as the electrode. It is filled with a special catalyst in the combustion chamber. It can fully convert the alcohol entering the combustion chamber into electrical energy. That is, voltage is generated on the two electrodes, and the electrical energy is consumed on the external load. This voltage is directly proportional to the alcohol concentration entering the combustion chamber. This is the basic working principle of the fuel cell type breath alcohol tester.

Instrument World World Network pointed out that the use of alcohol detector should pay attention to the following points 1, when used, first open the machine to warm up, preheating is completed, you can blow against the air blow hole, it is worth noting that the mouthpiece is a one-time , must be thrown after use, use again is to change the mouthpiece.

2, alcohol detector must use high-quality batteries, do not use ordinary batteries because of cheap, because the ordinary battery is easy to leak, and corrode the motherboard, this way, this machine will be scrapped.

3, When not in use for a long time, the battery should be taken out and stored in a dry and ventilated place. If it is a rechargeable battery, the battery should be charged periodically so as to maintain the service life of the battery. Save the same way.