Shenzhen ZhongNuo Testing Technology Co., Ltd. specializes in the calibration, verification, and measurement services for gas alarms, combustible gas detectors, toxic and harmful gas detectors, and other equipment, serving various locations nationwide. We address a range of electrical safety and explosion-proof fire prevention issues for customers, contributing to safe production.
Which gas detectors require regular calibration and metrological verification?
All types of in-use fixed, handheld, and portable gas detectors, gas alarms, toxic and harmful gas detectors/alarms, flammable gas detectors/alarms, gas analyzers, etc.

How often should various gas detectors be periodically calibrated and tested?
Instrument recalibration is typically every 1 year, determined by the submitting unit based on actual usage. During the secondary calibration process, if there are doubts about the instrument's test data, or if the main components of the instrument are replaced, or if recalibration is required after repairs.

GB 12358-2024 "General Technical Requirements for Environmental Gas Detection and Alarm Instruments in Workplace" is an important standard.
Intended to standardize the performance, functions, and testing methods of environmental gas detection alarm instruments used in work places.
The standard was issued in 1990 and has undergone several revisions.
The new version is GB 12358—2024, which will be officially implemented on June 1, 2025.
This standard applies to the production and use of detection and alarm instruments for flammable gases, toxic and harmful gases, and oxygen in work environments.

What factors can affect the calibration cycle of a combustible gas detector?
Manufacturer Requirements: Different manufacturers may have varying inspection cycle requirements for their flammable gas detectors. Therefore, when purchasing equipment, it is essential to carefully review the product manual to understand the specific requirements of the manufacturer.
Equipment Usage Environment: The operating environment of the alarm directly impacts its inspection cycle. If the equipment is frequently exposed to high concentrations of harmful gases, high or low humidity, or high or low temperatures for extended periods, the inspection cycle may be accordingly shortened.
‌Equipment Maintenance Status: The maintenance condition of the equipment is also a significant factor affecting the inspection cycle. If the equipment faces issues such as battery depletion or sensor aging over a long period, the inspection cycle will correspondingly be shortened.
Shenzhen ZhongNuo Testing Technology Co., Ltd. is an independent third-party service provider specializing in electrical safety, electrical explosion-proofing, gas detectors, and toxic gas alarm instruments for regular calibration, measurement, and certification. We offer qualifications to address fire and explosion prevention issues for our clients.