Shenzhen Zhongnuo Testing Technology Co., Ltd. specializes in the calibration, verification, and measurement services for equipment such as gas alarms, combustible gas detectors, and toxic gas detection instruments for various locations. We hold the necessary qualifications to serve customers nationwide, addressing various electrical safety and explosion-proof fire prevention issues, and contributing to safe production.
Measurement Equipment Control
Instrument control includes calibration, follow-up calibration, and in-service inspection.

Which gas detectors require regular calibration and verification?
Fixed-install, handheld, and portable gas detectors, gas alarm instruments, toxic and harmful gas detectors/alarm systems, flammable gas detectors/alarm systems, gas detection instruments, etc.

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

GB 12358-2024 "General Technical Requirements for Environmental Gas Detection and Alarm Instruments in Workplaces" is an important standard.
Intended to standardize the performance, functions, and testing methods of environmental gas detection alarm instruments used in workplace operations.
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 gas detection and alarm instruments for flammable gases, toxic and harmful gases, and oxygen in workplace environments.
Shenzhen Zhongnuo Testing Technology Co., Ltd. is an independent third-party institution specializing in electrical safety, electrical explosion-proof, gas alarms, and toxic and harmful gas alarm instrument regular inspections, metrology, and calibration services, providing资质 to customers for fire and explosion prevention solutions.