Shenzhen Zhongnuo Inspection Technology Co., Ltd. specializes in the calibration, certification, and measurement services for gas alarms, combustible gas detectors, and toxic gas detectors for various locations. We offer services nationwide, addressing electrical safety and explosion-proof fire prevention issues for clients, and promoting safe production.
Standard for inspection and metrological calibration of flammable and toxic gas detectors:
GB/T50493-2019 "Design Standard for Detection and Alarm Systems of Combustible Gases and Toxic Gases in Petroleum and Chemical Industry"
GB12358-2006 General Technical Requirements for Environmental Gas Detection and Alarm Instruments in Workplaces
JJG693-2011 "Regulation for Calibration of Combustible Gas Detectors"

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

What factors influence the calibration cycle of flammable gas detectors?
Manufacturer Requirements: Flammable gas detectors from different manufacturers may have varying inspection cycle requirements. Therefore, when purchasing equipment, it is important 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 humidity, or extreme temperatures (either high or low), the inspection cycle may be accordingly shortened.
‌Equipment Maintenance Status: The condition of equipment maintenance 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, its inspection cycle will correspondingly shorten.

Regular Calibration Content for Gas Alarm Devices
Installation spacing of inspection (probe) points
2. Installation Height of the Detector
3. Indicated Error (Concentration)
4. Repeatability (Concentration)
5. Alarm Error (Concentration)
6. Response Time (Seconds)
Shenzhen Zhongnuo Testing Technology Co., Ltd. is a third-party institution specializing in electrical safety, electrical explosion-proofing, gas alarms, and toxic and harmful gas detection instruments for regular verification, measurement, and calibration services. We are qualified to help customers address fire and explosion prevention issues.