Shenzhen ZhongNuo Testing Technology Co., Ltd. specializes in the calibration, verification, and measurement services of gas alarms, combustible gas detectors, toxic and harmful gas detectors, and other equipment for various locations. We hold qualifications to serve nationwide, addressing all sorts of electrical safety and explosion-proof fire prevention issues for our clients, and contributing to safe production.
The calibration cycle for flammable gas detectors is typically once a year.
According to the standard JJG 693-2011 "Flammable Gas Detectors," the calibration cycle for flammable gas detectors generally does not exceed 1 year. This means that under normal circumstances, a comprehensive calibration and testing of the flammable gas detector should be conducted annually to ensure its performance meets the relevant requirements.

Instrument Calibration Control
Instrument control includes calibration, follow-up calibration, and in-service inspection.

Regulatory content for periodic inspections of gas detectors
Installation spacing of inspection points
2. Installation Height of the Detector
3. Indicated Error (Concentration)
4. Repeatability (Concentration)
5. Alarm Error (Concentration)
6. Response Time (seconds)

Appearance and structure
The instrument should not have any surface damage that affects its normal operation. The surface of newly manufactured instruments should be smooth and even, with a uniform paint and coating, free of peeling and rusting.
The instrument's connections are reliable, and all dials or buttons should operate and control normally.
Logos and symbols
Instrument name, model, manufacturer's name, date of manufacture, serial number, explosion-proof marking and number, as well as the manufacturing metrology license mark and number for domestic instruments should be clear.
Shenzhen Zhongnuo Inspection & Testing Technology Co., Ltd. is an independent third-party service provider specializing in electrical safety, electrical explosion prevention, gas alarm systems, and toxic/hazardous gas detection equipment. We offer regular calibration, measurement, and certification services, and are qualified to help clients address fire and explosion prevention issues.