Instructions on detection methods and classification of gas detectors
You must understand the parameters and other related data issues of your gas detector to ensure accurate measurement values 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 to you the detection principle and application of the gas detector.
The gas detector is one of the most safe detection tools that uses its own equipment system to detect toxic and harmful gases to generate 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 currently used in gas detectors to detect toxic and harmful gases. The characteristics of electrochemical sensors are small size, low power consumption, good linearity and repeatability, and long life.
2. Colorimetric tube measurement technology. In addition to toxic gas detectors using toxic gas alarms, colorimetric tube technology is a detection method for toxic and harmful gases currently used in industrial environmental protection. The advantage of this measurement method based on chemical color reaction is that it can make up for the shortcomings of instrument measurement without suitable detection sensors.
3. Ionization detectors. The ionization detectors currently available on the market are divided into photoionization detectors (PID: PhotoIonizationDetector) and flame ionization detectors (FID: FlameIonizationDetector). They are the most commonly used on gas chromatography instruments. Toxic gas detectors, and these two sensors are made into separate instruments, which has become the most commonly used detection method to detect volatile organic compounds.
4. Semiconductor sensor toxic gas detector Semiconductor sensor is a detection element made of metal oxide or metal semiconductor oxide material. It can produce surface adsorption or reaction when interacting with gas, causing carrier movement Characterized by conductivity or voltammetric properties or changes in surface potential. It can be used to detect percentage concentrations of flammable gases and ppm-level toxic gases.
Gas detectors can generally be used in a variety of environments. Use 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 industry, industrial production and mineral development, flue gas and tail gas environment monitoring, Sewage treatment, biopharmaceuticals, home environmental protection, school laboratories and other fields.
Gas detectors are tools often used when conducting leak checks in gas storage areas. Ideal for use around process equipment, piping systems and into tight spaces. One-handed operation, the instrument includes a built-in pump and a flexible sampling rod (to detect the location of the leak source). Large characters and a backlight display ensure that the detected gas concentration value can be read clearly in dark and dark environments.
