Shenzhen ZhongNuo Testing Technology Co., Ltd. specializes in the calibration, certification, and metrological services for gas alarms, combustible gas detectors, and toxic gas detection instruments for various locations. We serve nationwide, providing solutions for electrical safety and explosion-proof fire prevention issues, facilitating safe production.
Regulatory Content and Methods for Regular Flammable Gas Detector Inspections
Annual inspections are conducted on the sensors of commercial and industrial alarm systems, primarily checking for the accuracy, repeatability, drift, and response time of the alarms to ensure they meet standards. Additionally, the suitability of the alarm installation location and any interference from other equipment are assessed.

Power-on inspection
The instrument should operate normally after being powered on, with the display sections being clear and complete. Check the alarm function and the alarm action values.
Alarm function and alarm action value verification
The instrument's sound and light alarm should function normally. Insulation resistance
Insulation resistance for instruments using alternating current power should not be less than 20MΩ.

How often should various gas detectors be periodically tested and calibrated?
The recalibration time for instruments is typically one year, determined by the sending unit based on actual usage. During the re-calibration process, if there are doubts about the instrument's test data, or if the main components of the instrument are replaced, as well as after repairs, a re-calibration is required.

What factors affect the calibration cycle of flammable gas detectors?
Manufacturer Requirements: Different manufacturers may have varying inspection cycle requirements for their flammable gas detectors. Therefore, when purchasing equipment, carefully review the product manual to understand the specific requirements of the manufacturer.
Equipment Operating Environment: The operating environment of the alarm can directly impact its inspection cycle. If the equipment is continuously exposed to high concentrations of harmful gases, high or low humidity, or high or low temperatures, its 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 frequently faces issues like battery depletion and sensor aging, the inspection cycle will accordingly be shortened.
Shenzhen ZhongNuo Inspection & Technology Co., Ltd. is a third-party institution specializing in electrical safety, electrical explosion-proofing, gas alarm systems, and toxic gas detection equipment, providing regular calibration, measurement, and certification services. We are licensed to address fire and explosion prevention issues for our clients.