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 in various locations. We hold qualifications to serve nationwide, addressing clients' electrical safety and explosion-proof fire prevention issues, and contributing to safe production.
Regular Inspection Content for Gas Alarms
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)

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 clean, with even paint and coating layers, and free from peeling or rusting.
The instrument's connections are reliable, and all dials or buttons should operate and control normally.
Logos and Branding Marks
Instrument name, model, manufacturer's name, manufacturing date, serial number, explosion-proof markings and numbers, as well as the manufacturing metrological instrument license mark and number for domestic instruments should be clear.

Combustible Gas Detector Alarm Regular Inspection Content and Methods
Annual inspections are conducted on industrial and commercial alarm sensors, primarily checking for measurement errors, repeatability, drift, and response times in compliance with standards. Additionally, the suitability of the alarm sensor's installation location and any interference from other equipment are assessed.

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 detectors generally does not exceed one year. This means that under normal circumstances, a comprehensive calibration and testing of the flammable gas detectors should be conducted annually to ensure their performance meets the relevant requirements.
Shenzhen Zhongnuo Inspection & Technology Co., Ltd. is a third-party institution specializing in electrical safety, electrical explosion-proofing, gas detectors, and toxic and harmful gas alarm instruments for regular calibration, measurement, and certification services. We are qualified to solve fire and explosion prevention issues for clients.