Suzhou Gas Detector Calibration Standard

Shenzhen Zhongnuo Testing Technology Co., Ltd. specializes in the calibration, verification, and metrological services for gas alarms, combustible gas detectors, and toxic/hazardous gas detectors for various locations. We are fully qualified to serve nationwide, addressing all types of electrical safety and explosion-proof fire prevention issues for our 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 period for flammable gas detectors generally does not exceed one year. This means that under normal circumstances, a comprehensive calibration and test of the flammable gas detector is required annually to ensure that its performance meets the relevant requirements.

Gas Standard Material
The standard gas used should be a substance of the same type as the gas being measured by the instrument, such as methane, ethane, or a gas standard can also use isopropanol, etc. If the instrument does not specify the type of gas being measured, the concentration of the gas with a 60% error margin set by the instrument for methane, ethane, etc., should be approximately the full scale of the standard substance. The uncertainty of the expanded gas standard substance is not large (%), and the standard gas standard substance should be converted into the same concentration unit as the measuring instrument when in use. The flow value error of the repetitive dilution device should not be greater than 0.%.

What are the contents included in the calibration report for flammable gas detectors?
The verification results should be reflected in the verification certificate or report, and the verification proof or report must include the following information.
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), indicating page number and total pages for each page
⑤Shipper's name and address
⑥ Describe and clearly identify the target school.
Calibration date and receipt date;
⑧ Technical specifications for calibration foundation, including names and codes;
Description of the traceability and validity 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 calibration report, and the issuance date;
13. Calibration results are only applicable to the calibration object.
14. No part of the certificate or report may be copied without written consent from the laboratory.
Two-proofing time interval
The recalibration period for instruments is typically one year, subject to self-determination by the submitting unit based on actual usage. During the re-calibration process, if there are doubts about the instrument's test data, or if the main components of the instrument are replaced, as well as after repairs, recalibration is required.

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 sites.
The standard was published in 1990 and has undergone several 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 gas detection and alarm instruments for flammable, toxic, and harmful gases, as well as oxygen, in work environments.
Shenzhen Zhongnuo Testing Technology Co., Ltd. is a third-party institution providing regular certification, measurement, and calibration services for electrical safety, electrical explosion-proofing, gas alarms, and toxic and harmful gas detectors, as well as qualifications to address fire and explosion prevention issues for clients.