Detection method and classification description of gas detector
It is necessary to understand the parameters of your own gas detector and other related data problems, so as to ensure the accuracy of the measured values and not damage the instrument. The core of gas detector is sensor. In short, the classification of sensor is the classification of gas detector. Today, I will introduce the detection principle and application of gas detector to you.
The gas detector is one of the safety detection tools that use its own equipment system to detect toxic and harmful gases, thus giving early warning. The detection methods and types can be roughly divided into the following categories:
1. Electrochemical sensor Electrochemical sensor is a common and mature detection technology used in gas detector to detect A toxic and harmful gas. Electrochemical sensors are characterized by small volume, low power consumption, good linearity and repeatability, and long service life.
2. Colorimetric tube measurement technology Toxic gas detector In addition to the toxic gas alarm, colorimetric tube technology is a detection method of toxic and harmful gases that is still used in industrial environmental protection. The advantage of this measurement method based on chemical color reaction is that it can make up for the lack of suitable detection sensors when measuring with instruments.
3. Ionization detectors The ionization detectors that can be seen in the market at present are divided into PID：PhotoIonizationDetector (PID) FID：FlameIonizationDetector (FID), which are commonly used toxic gas detectors in gas chromatography instruments. Making these two sensors into instruments independently has become a common detection method to detect volatile organic compounds at present.
4. Semiconductor sensor toxic gas detector Semiconductor sensor is a detection element made of metal oxide or metal semiconductor oxide material. Laser cutting machine can produce surface adsorption or reaction when it interacts with gas, causing changes in conductivity or volt-ampere characteristics or surface potential characterized by carrier movement. It can be used to detect flammable gases with a percentage concentration, and it can also be used to detect toxic gases with a ppm level.
Generally, gas detectors can be used in a variety of environments, which can ensure the stable operation and maintenance frequency of the machine in the correct environment. Generally, gas detectors are mostly used in petrochemical industry, industrial production and mineral development, flue gas and tail gas environmental monitoring, sewage treatment, biopharmaceuticals, home environmental protection, school laboratories and other fields.
Gas detector is a tool that is often used in gas storage area for leak inspection. It is especially suitable for use around process treatment equipment, piping system and entering narrow spaces. One-handed operation, the instrument includes a built-in pump and a soft sampling rod (to find out the location of the leakage source), large characters and background light display, ensuring that the detected gas concentration value can be clearly read in dark and unlit environment.
