Shenzhen Zhongnuo Testing Technology Co., Ltd. specializes in the calibration, verification, and metrological services for equipment such as gas alarms, combustible gas detectors, and toxic and harmful gas detectors for various locations. We hold qualifications to serve nationwide, providing solutions to electrical safety and explosion-proof fire prevention issues for our clients, contributing to safe production.
What factors can affect the calibration cycle of a combustible gas detector alarm?
Manufacturer Requirements: Different manufacturers may have varying inspection cycle requirements for flammable gas detectors. Therefore, when purchasing equipment, carefully review the product manual to understand the specific requirements of the manufacturer.
Equipment Usage Environment: The operating environment of the alarm directly affects 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, its inspection cycle may be shortened accordingly.
‌Equipment Maintenance Status: The condition of equipment maintenance is also a significant factor affecting the inspection cycle. If the equipment is long-term exposed to issues like battery depletion and sensor aging, the inspection cycle will correspondingly shorten.

How often is it required to calibrate and certify various gas detectors?
The recalibration period for instruments is typically one year, subject to self-determination by the submitting unit based on actual usage. During the re-calibration process, if there are any 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 Workplaces" is an important standard.
Intended to standardize the performance, functions, and testing methods of environmental gas detection alarm instruments used in work场所.
The standard was issued in 1990 and has undergone several revisions.
The new version is GB 12358-2024 and 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 workplaces.

Gas Detector Alarm Calibration Specification Requirements
"Regulation 5.5 of the "Regulation for the Verification of Flammable Gas Detectors" (JJG693-2011) stipulates: The verification cycle for flammable gas detection and alarm instruments: Generally, the verification cycle for the instrument should not exceed one year. If there is any doubt about the instrument's measurement data, or if the instrument has been replaced with major components or repaired, it should be promptly sent for verification."
Section 3.5 of the "Regulations for the Use of Combustible Gas Detection and Alarm Systems" (SY6503-2000) stipulates: The combustible gas detection and alarm systems in use shall be calibrated regularly as required.
Occupational Health Standards for Toxic Gas Equipment Installation (GBZ/T223-2009) Article 7.2.1 stipulates: Calibration of detection and alarm devices shall be performed regularly according to the manufacturer's specified time and procedures.
Section 3.4 of the "Regulations for the Use of Combustible Gas Detectors and Alarms" (SY6503-2000) stipulates: Combustible gas detectors and alarms for installation and use shall have measurement instruments manufactured by an institution recognized for their **explosion-proof performance**.
Shenzhen Zhongnuo Testing Technology Co., Ltd. is a third-party institution specializing in electrical safety, electrical explosion-proofing, gas detectors, and toxic gas alarm instruments for regular inspections, metrological measurements, and calibration services. We are qualified to provide solutions for fire and explosion prevention issues for our clients.