How to choose and use a gas detector
Gas conditions cannot be identified by smell or vision. In order to avoid gas hazards during work, we must rely on detection equipment that can respond sensitively, accurately and quickly to hazardous gases to detect hazards. Therefore, the correct selection of gas detectors has become a Important topics are a necessary part of hazard assessment before entering work.
First of all, gas detectors can be divided into fixed and portable types according to the occasion and mobility. In terms of use, portable gas detectors are used for inspections, detecting gas concentrations at various possible escape points in the factory, or for emergency response. They are characterized by being lightweight and can obtain measurement data in a short time; while fixed gas detectors are multi-purpose Long-term monitoring in factories, such as explosion-proof areas. It features long-term monitoring and saves human resources.
Most of the gas detectors currently available on the market for use in limited spaces are suitable for measuring oxygen, explosive gases, carbon monoxide and hydrogen sulfide, because these hazardous gases are the most common, but the instrument manufacturer cannot guarantee the suitability of the instrument. Therefore, the following aspects should be considered when selecting a detector: applicability, stability, calibration requirements, protection requirements, and ease of identification.
After selecting a suitable instrument, you also need to pay attention to the following issues when using a gas detector:
1. Pay attention to regular calibration and testing
Gas detectors are all measured using a relative comparison method: first calibrate the instrument with a zero gas and a standard concentration gas, obtain a standard curve and store it in the instrument, and calculate the accurate gas concentration value. Therefore, zeroing the instrument at any time and calibrating the instrument frequently are essential tasks to ensure accurate measurement. It should be noted that many current gas detectors can replace the detection sensors, but this does not mean that a detector can be equipped with different detector probes for detection at any time.
2 Pay attention to detection interference between various sensors
Each sensor corresponds to a specific detection gas, but any gas detector cannot be special. Therefore, when selecting a gas sensor, you should try to understand the detection interference of other gases on the sensor to ensure its accurate detection of specific gases.
3 Pay attention to the concentration measurement range of the detection instrument
All types of gas detectors have their own detection ranges, and different models have different range values. Only by completing measurements within its measuring range can the instrument be guaranteed to perform accurately. If the measurement is performed outside the measurement range for a long time, the safety of the sensor may be damaged.
