Shenzhen ZhongNuo Testing Technology Co., Ltd. specializes in the certification, calibration, and metrological services for gas alarms, flammable gas detectors, toxic and harmful gas detectors, and other equipment in various locations. We provide qualifications and services nationwide, addressing electrical safety and explosion-proof fire prevention issues for customers, and contributing to safe production.
Flammable Gas Detector Alarm Regular Inspection Content and Methods
Annual inspections are conducted on the sensors of commercial and industrial alarm systems, primarily checking for measurement errors, repeatability, drift, and response times in compliance with standards. Additionally, the suitability of the alarm system's installation location and any interference from other equipment are assessed.

Flammable and toxic/hazardous gas detectors calibration and metrological verification based on standard:
GB/T50493-2019 "Design Standard for Detection and Alarm of Combustible Gases and Toxic Gases in Petroleum and Chemical Industry"
GB12358-2006 General Technical Requirements for Environmental Gas Detection and Alarm Instruments in Workplace
JJG693-2011 "Regulation for Calibration of Combustible Gas Detectors"

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.
① Title, such as "Calibration Certificate" or "Calibration Report";
② Laboratory Name and Address;
③ Calibration Location (if not calibrated in the laboratory)
④ Standing proof or report (e.g., numbered), with page numbers and total page count indicated on 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 base, including name and code;
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 symbol, and issuance date of the certifier or issuer of the calibration certificate or calibration report
13. Calibration results are only applicable to the calibration object.
14. No part of the certificate or report may be copied without the written consent of the laboratory.
Re-review time interval
Instrument recalibration is typically every 1 year, determined by the sending unit based on actual usage. During the secondary calibration process, if there are any doubts about the instrument's test data, or if the main components of the instrument are replaced, as well as after repairs, a recalibration is required.

Measurement Equipment Control
Instrument control includes calibration, follow-up calibration, and in-service inspection.
Shenzhen ZhongNuo Testing Technology Co., Ltd. is a third-party institution that provides regular certification, measurement, and calibration services for electrical safety, electrical explosion-proofing, gas detectors, and toxic and harmful gas alarm instruments. We hold the necessary qualifications to assist customers in solving fire and explosion prevention issues.