Shenzhen ZhongNuo Testing Technology Co., Ltd. specializes in the calibration, verification, and metrological services of gas detectors, combustible gas detectors, toxic and harmful gas detectors, and other equipment for various locations. We hold qualifications to serve nationwide, providing solutions to electrical safety and explosion-proof fire prevention issues for our clients, contributing to safe production.
Regular Inspection Content for Gas Detectors
Installation spacing of inspection (probe) points
2. Installation Height of the Detector
3. Indicated Error (Concentration)
Repeatability (Concentration)
5. Alarm Error (Concentration)
6. Response Time (seconds)

Which gas detectors require regular calibration and verification?
Fixed-install, handheld, and portable gas alarms, gas detectors, toxic and harmful gas detectors/alarm systems, flammable gas detectors/alarm systems, gas analyzers, etc.

Regulatory Content and Methods for Regular Detection of Flammable Gas Detectors
Annual inspections are conducted on the sensors of commercial and industrial alarms, primarily checking for the accuracy, repeatability, drift, and response time of the alarms to ensure they meet standards. Additionally, the suitability of the alarm's installation location and any interference from other equipment are assessed.

Gas Alarm Meters Calibration Conditions and Requirements
Environmental Conditions
Ambient Temperature: 0~40℃.
2. Relative Humidity: ≤85%
3. The working environment should not affect the normal operation of the instrument with electromagnetic fields and interfering gases.
Inspection Gauges and Instruments
1) Gas Standard Material
The relative expanded uncertainty of the gas standard material does not exceed 2% (k=2).
2) Standard Gas Dilution Unit: Dilution Error of 1%.
3) Stopwatch: graduation not greater than 0.1s.
4) Flow Control: Flow rate not less than 500 mL/min, flow grade not less than 4.
5) Zero Point Gas: Purified compressed air.
6) Pressure Reducing Valve: A pressure reducing valve that matches with the calibrated cylinder.
7) Gas Pipeline: Tubing made of materials like polytetrafluoroethylene or stainless steel that do not affect the concentration of the measured gas.
Shenzhen ZhongNuo Testing Technology Co., Ltd. is a third-party institution providing regular inspections, measurements, and calibrations for electrical safety, electrical explosion-proofing, gas alarms, and toxic gas detection equipment, with qualifications to address fire and explosion prevention issues for clients.