Shenzhen Zhongnuo Testing Technology Co., Ltd. specializes in the certification, calibration, and metrological services for gas alarms, flammable gas detectors, and harmful gas detectors in various locations. We offer national services, solving all kinds of electrical safety and explosion-proof fire prevention issues for clients, and supporting safe production.
What does a calibration report for a combustible gas detector include?
The results of the verification should be reflected in the verification certificate or report. 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 Standby letter of credit or report (e.g., numbered), with indication of page number and total pages
5. Send the company name and address.
⑥ Describe and clearly define the target school;
Calibration Date and Receipt Date
⑧ Technical specifications for calibration foundation, including name and code;
Description of the traceability and validity of the measurement standards used in our 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 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.
Re-proofreading interval
Instrument recalibration is typically every 1 year, determined by the submitting 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.

Appearance and structure
The instrument should not have any appearance damage that affects its normal operation. The surface of newly manufactured instruments should be smooth and clean, with a uniform paint and coating, free from peeling and rusting.
The instrument's connections are reliable; all dials or buttons should operate and control normally.
Logos and branding
Instrument name, model, manufacturer's name, manufacturing date, serial number, explosion-proof markings and numbers, as well as the domestic instrument's manufacturing metrological instrument license mark and number should be clear.

Measurement Equipment Control
The instrument control includes calibration, follow-up calibration, and in-service inspection.

What factors can affect the calibration cycle of a combustible gas detector alarm?
Manufacturer Requirements: Different manufacturers may have varying inspection cycle requirements for their flammable gas detectors. Therefore, when purchasing equipment, it is essential to carefully review the product manual to understand the specific requirements of the manufacturer.
Equipment Operating Environment: The operating environment of the alarm directly affects its inspection cycle. If the equipment is frequently exposed to high concentrations of harmful gases, high or low humidity, or high or low temperatures for extended periods, its inspection cycle may be shortened accordingly.
‌Equipment Maintenance Status: The condition of equipment maintenance is also a significant factor affecting the inspection cycle. If the equipment is frequently faced with issues like battery depletion and sensor aging, the inspection cycle will correspondingly be shortened.
Shenzhen Zhongnuo Testing Technology Co., Ltd. is a third-party institution specializing in electrical safety, electrical explosion-proofing, gas alarm systems, and toxic/hazardous gas detection instruments, offering regular calibration, measurement, and certification services. We are qualified to solve fire and explosion prevention issues for our clients.