Shenzhen Zhongnuo Testing Technology Co., Ltd. specializes in the certification, calibration, and metrological services for gas alarms, flammable gas detectors, toxic and harmful gas detectors, and other equipment at various locations. We hold the necessary qualifications to serve nationwide, addressing electrical safety and explosion-proof fire prevention issues for our clients, and contributing to safe production.
How often should various gas detectors be periodically tested and calibrated?
The recalibration time for instruments is typically one year, and the testing unit determines it 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 required after repairs.

The calibration cycle for flammable gas detectors is typically once a year.
In accordance with the standard JJG 693-2011 "Flammable Gas Detectors," the calibration cycle for flammable gas alarms typically does not exceed one year. This means that, under normal circumstances, a comprehensive calibration and test of the flammable gas alarm is required annually to ensure its performance meets the relevant requirements.

The instrument's detection principles primarily include catalytic combustion, infrared absorption, and thermal conductivity types. Sampling methods include diffusion and aspiration. The instrument is mainly composed of detection elements, amplification circuits, alarm systems, and displays, used for monitoring the concentration of combustible gases in the environment.

Which gas detectors require regular calibration and metrological verification?
All types of in-use fixed, handheld, portable gas detectors, gas alarm instruments, toxic and harmful gas detectors/alarm systems, flammable gas detectors/alarm systems, gas analyzers, etc.
Shenzhen Zhongnuo Testing Technology Co., Ltd. is a third-party institution specializing in electrical safety, electrical explosion-proofing, gas alarm systems, and toxic and harmful gas detection instruments for regular calibration, measurement, and certification services. We are qualified to address fire and explosion prevention issues for our clients.