Six Selection Criteria for Gas Detectors
① Stability Stability is an essential and primary consideration. Check the values of zero‑point offset and full‑scale offset; the smaller the values, the better.
② Portability Field operations are common in practical work. On the premise of stable performance, portability is also a vital factor. The instrument shall be light‑weighted, compact, easy and comfortable to wear, and simple to maintain.
③ Applicability Technicians shall identify and evaluate hazardous gases in confined‑space worksites, so as to confirm whether the sensors of the selected detector meet application requirements.
④ Reliability Longer sensor service life is preferred. Generally, the minimum service life of sensors is 2 years, while combustible‑gas sensors last 2‑5 years. Longer mean time between failures is desirable. Pay attention to accuracy and precision; lower error values are better.
⑤ Protection Requirements Verify whether the explosion‑proof safety rating is suitable for the workplace. Confirm whether the product has obtained relevant certifications, such as explosion‑proof certificate and metrological verification certificate.
⑥ Readability Check whether the display area is large enough with clear fonts. Ensure the alarm sound is sufficiently loud and alarm flashing lights can be recognized from various viewing angles.
