Shenzhen Zhongnuo Testing Technology Co., Ltd. specializes in the calibration, certification, and measurement services for equipment such as gas alarms, flammable gas detectors, and toxic/hazardous gas detectors for various locations. We provide services nationwide, addressing electrical safety and explosion-proof fire prevention issues for customers, and contributing to safe production.
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), and indicate each page and page number.
5. Shipper's name and address
⑥ Describe and clearly identify the school target.
Calibration Date and Receipt Date
⑧ Technical specifications for calibration base, including names and codes.
Description of the traceability and effectiveness of the measurement standards used in our calibration.
⑩ Description of Calibration Environment
11. Calibration Results and Measurement Uncertainty Statements
12. Signature, title or equivalent symbol, and issuance date of the certifier or issuer of the calibration certificate or report;
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-review interval
Instrument recalibration is typically every 1 year, determined by the sending unit based on actual usage. During the re-certification process, recalibrate the instrument if there are questions about the test data, if the main components of the instrument are replaced, or after repairs.

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 even, with a uniform paint and coating, free of peeling and rusting.
The instrument's connections are reliable, and all dials or buttons should operate and control normally.
Branding and logos
Instrument name, model, manufacturer's name, manufacturing date, serial number, explosion-proof marking and number, as well as the manufacturing metrological instrument license marking and number of domestic instruments should be clear.

Routine Inspection Items for Environmental Gas Detection and Alarm Equipment at Work Sites:
1. Alarm sound and light (if applicable)
2. Small response value
3. Indicating Error (for Gas Detectors/Gas Detector Alarms)
4. Instrument Drift (in Portable Instruments)
5. Alarm Error (for Gas Detection Alarms/Gas Alarm Meters)
6. Pump Suction Instrument Gas Sampling Distance and Flow Rate (for Pump Suction Instruments)
7. Power Supply (for battery-operated equipment)
8. Response Time
9. Status Indicator (with wireless communication function)

Which gas detectors require regular calibration and verification?
Fixed-install, handheld, and portable gas detectors, gas alarm instruments, toxic and harmful gas detectors/alarm systems, flammable gas detectors/alarm systems, gas analyzers, etc.
Shenzhen ZhongNuo Testing Technology Co., Ltd. is an independent third-party service provider specializing in electrical safety, electrical explosion-proof, gas alarm, and toxic/hazardous gas alarm instrument calibration, periodic verification, and measurement services. We are qualified to address fire and explosion prevention issues for our clients.