About the detection methods and classification instructions of gas detectors
To understand the parameters of your own gas detector and other related data issues, so as to ensure the accuracy of the measured value and not damage the instrument. The core of the gas detector is the sensor. In short, the classification of the sensor is the classification of the gas detector. Today, I will introduce the detection principle and application of the gas detector.
The gas detector is one of the safety detection tools that use its own equipment system to detect toxic and harmful gases so as to generate early warnings. 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 currently used in gas detectors to detect toxic and harmful gases. Electrochemical sensors are characterized by small size, low power consumption, good linearity and repeatability, and long life.
2. Colorimetric tube measurement technology In addition to the use of toxic gas alarms in toxic gas detectors, colorimetric tube technology is currently a detection method for toxic and harmful gases that is still used in industrial environmental protection. The advantage of this measurement method based on chemical chromogenic reaction is that it can make up for the lack of suitable detection sensors encountered in instrument measurement.
3. Ionization detectors The ionization detectors that can be seen on the market are divided into photoionization detectors (PID: PhotoIonization Detector) and flame ionization detectors (FID: FlameIonization Detector), which are the most commonly used on gas chromatography instruments. Toxic gas detectors, these two sensors are made into separate instruments, and it has become the most commonly used detection method to solve the detection of volatile organic compounds.
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 generate surface adsorption or reaction when interacting with gas, causing carrier movement Characterized by conductivity or volt-ampere characteristics or changes in surface potential. It can be used to detect flammable gases in percentage concentration, and can also be used to detect toxic gases in ppm level.
Gas detectors can generally be used in a variety of environments. Using them in the correct environment can ensure the stable operation of the machine and the frequency of maintenance. Generally, gas detectors are mostly used in petrochemical, industrial production and mineral development, flue gas and tail gas environmental monitoring, Sewage treatment, biopharmaceuticals, household environmental protection, school laboratories and other fields.
A gas detector is a tool that is often used when performing leak inspections in gas storage areas. Ideal for use around process equipment, piping systems and into confined spaces. One-handed operation, the instrument includes a built-in pump and a soft sampling rod (to find out the location of the leak source), large characters, and a backlight display to ensure that the detected gas concentration can be clearly read in dark and dark environments.
