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 the necessary qualifications to serve nationwide, providing solutions to electrical safety and explosion-proof fire prevention issues for clients, and contributing to safe production.
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 alarms typically does not exceed 1 year. This means that, under normal circumstances, a comprehensive calibration and testing of the flammable gas alarm is required annually to ensure its performance meets relevant requirements.

Regular inspection items for environmental gas detection and alarm instruments in work场所:
Alarm sound and light (if applicable)
2. Low response value
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-actuated instrument gas collection distance and flow rate (for pump-actuated instruments)
7. Power Supply (for battery-powered instruments)
8. Response Time
9. Status Indicator (with Wireless Communication Function)

Power-on inspection
After power is applied to the instrument, it should operate normally with clear and complete display sections. Check the alarm function and alarm action values.
Alarm function and alarm action value verification
The instrument's audio-visual alarm should function normally. Insulation resistance.
Insulation resistance for instruments using AC power should not be less than 20MΩ.

Gas Detector Alarm Calibration Specification Requirements
Regulation 5.5 of the "Regulation for Calibration of Combustible Gas Detectors" (JJG693-2011) stipulates: The calibration cycle for combustible gas detection and alarm instruments: generally, the calibration cycle of the instrument shall not exceed one year. Instruments with suspected measurement data, replaced major components, or repaired should be promptly submitted for calibration.
Section 3.5 of the "Regulations for the Use of Combustible Gas Detection and Alarm Systems" (SY6503-2000) stipulates: Combustible gas detection and alarm systems in use shall be calibrated regularly as per regulations.
Occupational Health Standards for Toxic Gas Devices in Workplaces (GBZ/T223-2009) Article 7.2.1 stipulates: Calibration of detection and alarm devices should be performed regularly according to the manufacturer's specified time and procedures.
Regulation 3.4 of the "Use Specification for Combustible Gas Detectors and Alarms" (SY6503-2000) states: Combustible gas detectors and alarms for installation and use should have measurement instruments manufactured by an institutionally recognized manufacturer, with explosion-proof performance.
Shenzhen ZhongNuo Testing Technology Co., Ltd. is a third-party institution specializing in electrical safety, electrical explosion-proof, gas alarm, and toxic gas detection equipment for regular inspections, metrological measurements, and calibrations. We are qualified to address fire and explosion prevention issues for our clients.