Shenzhen ZhongNuo Testing Technology Co., Ltd. specializes in the calibration, verification, and measurement services for gas alarms, combustible gas detectors, toxic and harmful gas detectors, and other equipment at various locations. We hold the necessary qualifications to serve nationwide, addressing all sorts of electrical safety and explosion-proof fire prevention issues for clients, and contributing to safe production.
Power-on inspection
After power is applied to the instrument, it should operate normally with clear and complete displays. Check the alarm function and alarm setpoint.
Alarm function and alarm action value verification
The instrument's sound and light alarm should function normally. Insulation resistance.
Insulation resistance for instruments using AC power should not be less than 20MΩ.

Regulatory contents and methods for periodic inspections of flammable gas detectors
Annual inspections of industrial and commercial alarm sensor probes are conducted regularly, primarily to check if the alarm sensors' indication errors, repeatability, drift, and response times comply with standards. Additionally, the suitability of the alarm sensor's installation location and any interference from other equipment are inspected.

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

Appearance and structure
The instrument should not have any appearance damage that affects its normal operation. The surface of newly manufactured instruments should be smooth and even, with a uniform paint coating and no signs of peeling or rust.
The instrument's connections are reliable, and all dials or buttons should operate and control normally.
Logos and Branding
Instrument name, model, manufacturer's name, manufacturing date, serial number, explosion-proof marking and number, as well as the manufacturing measurement instrument license marking and number for domestic instruments, should be clear.
Shenzhen ZhongNuo Testing Technology Co., Ltd. is a third-party institution that provides regular calibration, measurement, and verification services for electrical safety, electrical explosion-proof equipment, gas detectors, and toxic and harmful gas alarm instruments. We are qualified to assist clients in solving fire and explosion prevention issues.