Shenzhen Zhongnuo Testing Technology Co., Ltd. specializes in the calibration, certification, and metrological services for gas alarms, flammable gas detectors, toxic and harmful gas detectors, and other equipment for various locations. We provide nationwide services, addressing all sorts of electrical safety and explosion-proof fire prevention issues for clients, and contributing to 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 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), indicating each page and the total number of pages;
⑤Shipper's name and address
⑥ Describe and clearly identify the school's target audience.
Calibration Date and Receipt Date
⑧ Technical specifications for calibration foundation, including name and code;
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 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 approval from the laboratory.
Re-proofreading interval
Instrument recalibration is typically every 1 year, determined by the submitting unit based on actual usage. During the secondary calibration process, recalibrate the instrument if there are doubts about the test data, if the main components of the instrument are replaced, or if it needs to be recalibrated after repair.

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 and alarm instruments used in work places.
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.

Regulatory Content and Methods for Regular Detection of Flammable Gas Detectors
Annually, we conduct annual inspections of industrial and commercial alarm sensors, primarily checking for the accuracy of the alarm readings, repeatability, drift, and response time to ensure they meet standards. Additionally, we verify the suitability of the alarm installation location and check for any interference from other equipment.

Gas Standard Material
We use gas standard substances of the same type as the gas measured 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, such as methane, ethane, or警设定点涨度的气, at 60% is approximately the full scale. The uncertainty of the expanded gas standard substance is not more than % (the expanded uncertainty of the gas standard substance is greater than ±1%). The flow indication error of the repeatability dilution device should not be higher than the concentration of the gas standard substance. The concentration unit of the dilution device for the gas standard substance should be converted to the same as the measuring unit of the tested instrument, and the value should not exceed 0.%.
Shenzhen ZhongNuo Testing Technology Co., Ltd. is a third-party institution specializing in electrical safety, electrical explosion-proofing, gas alarms, and toxic gas detection equipment for regular inspections, metrological surveys, and calibration services. We are qualified to address fire and explosion prevention issues for our clients.