Shenzhen Zhongnuo Testing Technology Co., Ltd. specializes in the calibration, certification, and measurement services for gas alarms, flammable gas detectors, toxic and harmful gas detectors, and other equipment in various locations. We provide services nationwide, addressing various electrical safety and explosion-proof fire prevention issues for customers, and promoting safe production.
What does a calibration report for a flammable gas detector include?
The verification results should be reflected in the verification certificate or report, and the verification proof or report must include the following information.
① Calibration Certificate or Calibration Report
② Laboratory Name and Address
③ Calibration Location (if not calibrated in the laboratory)
④ Certificate or report (e.g., numbered), with indication of each page and page number;
⑤Shipper's name and address
⑥ Clearly describe and identify the target school.
Calibration date and receipt date;
⑧ Technical specifications for calibration foundation, including names and codes;
Description of the traceability and effectiveness of the measurement standards used for calibration.
⑩ Description of Calibration Environment
11. Calibration Results and Measurement Uncertainty Statement
12. Signature, title, or equivalent symbol of the issuer of the calibration certificate or report, and the issuance date;
13. Calibration results are only applicable to the verification object.
14. No part of the certificate or report may be copied without written consent from the laboratory.
Re-review interval
The recalibration time for instruments is typically 1 year, determined by the submitting unit based on actual usage. During the re-calibration process, if there are questions 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.

The principle of instrument detection mainly includes catalytic combustion, infrared absorption, and thermal conductivity types. Sampling methods include diffusion and aspiration. The instrument is mainly composed of detection elements, amplification circuits, alarm systems, and displays, used for monitoring the concentration of combustible gases in the environment.

Regular Inspection Items for Environmental Gas Detection and Alarm Equipment in Workplaces:
1. 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-suction Instrument 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 Function)

The calibration cycle for flammable gas detectors is typically once a year.
According to the standard JJG 693-2011 "Flammable Gas Detector and Alarm," the calibration cycle for flammable gas alarms generally does not exceed 1 year. This means that under normal circumstances, a comprehensive calibration and test of the flammable gas alarm is required annually to ensure its performance meets the relevant requirements.
Shenzhen ZhongNuo Testing Technology Co., Ltd. is a third-party service provider specializing in electrical safety, electrical explosion-proofing, gas alarm systems, and toxic/hazardous gas detection instruments for regular calibration, measurement, and certification. We are qualified to address fire and explosion prevention issues for our clients.