Shenzhen ZhongNuo Testing Technology Co., Ltd. specializes in the calibration, certification, and measurement services for gas alarms, combustible gas detectors, toxic and harmful gas detectors, and other equipment, serving various locations across the nation. We address a range of electrical safety and explosion-proof fire prevention issues for clients, contributing to safe production.
The principle of instrument detection mainly includes catalytic combustion, infrared absorption, and thermal conductive types. The sampling methods are diffusion and aspiration. The instrument is mainly composed of detection elements, amplifying circuits, alarm systems, and displays, used for monitoring the concentration of combustible gases in the environment.

What does a calibration report for a flammable gas detector include?
The verification results should be reflected in the verification certificate or report. The verification proof or report must include the following information.
① Title, such as "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., with serial number), and indicate each page and its number;
Please provide the name and address of the shipping entity.
⑥ Describe and clearly define the target school;
Calibration Date and Receipt Date
⑧ Technical specifications for calibration foundation, including names and codes;
Description of 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 emblem of the certifier issuing 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, to be determined by the submitting unit based on actual usage. During the re-calibration process, if there are any doubts about the instrument's test data, or if the main components of the instrument are replaced, or if recalibration is required after repairs.

GB 12358-2024 "General Technical Requirements for Environmental Gas Detection and Alarm Instruments in Workplace" is an important standard.
Intended to standardize the performance, functions, and testing methods of environmental gas detection alarm instruments used in work场所.
The standard was published in 1990 and has undergone multiple revisions.
The new version is GB 12358-2024, which will be officially implemented on June 1, 2025.
This standard applies to the production and use of detection and alarm instruments for flammable gases, toxic and harmful gases, and oxygen in workplace environments.

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 detectors generally does not exceed one year. This means that under normal circumstances, a comprehensive calibration and testing of the flammable gas detectors should be conducted annually to ensure their performance meets the relevant requirements.
Shenzhen ZhongNuo Testing Technology Co., Ltd. is an independent third-party institution offering regular electrical safety, electrical explosion-proof, gas alarm, and toxic/hazardous gas alarm instrument verification, measurement, and calibration services. We hold the necessary qualifications to assist clients in addressing fire and explosion prevention issues.