An introduction to the measuring range of portable gas detection instruments
Portable gas detection technology can be used for harmful gas detection, organic VOC gas detection, combustible gas detection, and single gas detection. The development of accurate warning and hidden danger detection technology is changing day by day, and its application in accident precursor inspection and elimination is becoming increasingly widespread. Its development direction is miniaturization and automation, in order to achieve long-term monitoring.
Portable gas detectors are widely used in industrial safety monitoring, indoor air quality testing, hazardous substance detection, and environmental protection monitoring. Addressing the critical links in the process of disaster incubation, occurrence, and development, and disrupting their chain of development, is an important part of the safety accident prevention and control technology system.
Pay attention to the measurement range of the portable gas detector used:
Any gas detector has a fixed detection range, and only within this range can measurements be completed. Otherwise, the measured results will be much lower than the values in your environment. In addition, prolonged measurement beyond the range can cause damage to the sensor, resulting in inaccurate results even within the measurement range later on.
Pay attention to the service life of the sensors in the gas detector used:
Gas detectors have a limit on their service life, and portable gas detectors are no exception. Even if they are not used frequently, they can still experience aging. In general, among portable gas detectors, photoionization detectors have the longest lifespan of about four years; The service life of LEL sensors is second, and they can be used for more than three years; The lifespan of electrochemical specific gas sensors is relatively short, generally ranging from one to two years; The oxygen sensor can only be used for about a year.
So, before use, be sure to read the manual carefully and use the sensor within its expiration date. If it is found to be expired, it needs to be replaced immediately.
Regular calibration and testing of the detector are required:
Portable gas detectors generally use relative comparison methods for measurement, as follows:
1. First, calibrate the instrument with a standard concentration of gas and a zero gas, and store the standard curve in the instrument;
2. Compare the electrical signal of the standard concentration with the electrical signal generated by the measured gas concentration, and calculate the accurate gas concentration value.
