Shenzhen Zhongnuo Testing Technology Co., Ltd. specializes in the calibration, verification, and measurement services for gas alarms, combustible gas detectors, and toxic gas detection instruments for various locations. We hold the necessary qualifications to serve nationwide, addressing clients' electrical safety and explosion-proof fire prevention needs, and contributing to safe production.
What factors affect the calibration cycle of flammable gas detectors?
Manufacturer Requirements: Different manufacturers' flammable gas detectors may have varying inspection cycle requirements. 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 directly affects its inspection cycle. If the equipment is frequently exposed to high concentrations of harmful gases, high or low humidity, or high or low temperatures for extended periods, 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 or aging sensors, the inspection cycle will accordingly be shortened.

Gas Standard Material
We use gas standard substances of the same type as the measured gas by the instrument, such as methane or ethane, or gas standards can also use isopropanol, etc. If the instrument does not specify the type of gas being measured, the concentration of the gas at 60% of the alarm set point is approximately the concentration of the standard substance at full scale. The uncertainty of the expanded gas standard substance is not significant (%). The repeatability of the dilution device should not exceed ±1%. The flow indication error of the dilution device should be low for high concentration gas standard substances. The concentration unit of the gas standard substance should be converted to the unit of the tested instrument when in use, and the value should not exceed 0.%.

Routine Inspection Items for Environmental Gas Detection and Alarm Equipment in Workplaces:
Alarm sound and light (if applicable)
2. Small response values
3. Indication Error (for Gas Detectors/Gas Detector Alarms)
4. Instrument Drift (in Portable Instruments)
5. Alarm Error (for Gas Detection Alarm/ Gas Alarm)
6. Pump Suction Instruments: Gas Sampling Distance and Flow Rate (for Pump Suction Instruments)
7. Power Supply (for battery-powered instruments)
8. Response Time
9. Status Indicator (with wireless communication capability)

Instrument Calibration Control
The instrument control includes calibration, subsequent calibration, and in-use inspections.
Shenzhen Zhongnuo Testing Technology Co., Ltd. is a third-party service provider specializing in electrical safety, electrical explosion-proofing, gas alarms, and toxic and harmful gas alarm instruments for regular inspections, metrological surveys, and calibration. We hold the necessary qualifications to address fire and explosion prevention issues for our clients.