Gas Detector
Calibrate gas detectors for safety in hazardous gas environments.
Standards
EN 45544, IEC 60079-29-1, ISO/IEC 17025
Typical Interval
6–12 months
Uncertainty Range
±5% of reading
What Is Gas Detector?
Gas detectors detect hazardous gases including CO (carbon monoxide), H₂S (hydrogen sulphide), O₂ (oxygen), and LEL (combustible gas) in industrial environments. Calibration uses certified calibration gas at known concentration to verify sensor response.
Applicable Standards
Primary standards: EN 45544, IEC 60079-29-1, ISO/IEC 17025
ISO/IEC 17025-accredited laboratories must maintain an unbroken traceability chain from the calibration result back to NIMT (Thailand's national metrology institute) or another internationally recognised NMI.
Typical Measurement Uncertainty
Expanded uncertainty is typically ±5% of reading, depending on the measurement range, reference equipment used, and environmental conditions. The actual uncertainty will be stated on your calibration certificate.
Recommended Calibration Interval
A calibration interval of 6–12 months is generally recommended. The appropriate interval for your specific instrument depends on usage frequency, environmental exposure, and any applicable regulatory or customer requirements.
What Your Calibration Certificate Will Include
- Calibration results — instrument indication vs. reference value at each test point
- Error and expanded uncertainty (U) at k=2 (95% confidence level)
- Traceability chain to NIMT or a recognised NMI
- Environmental conditions during calibration (temperature, humidity)
- Calibration date, certificate number, and authorised signature
Find a Gas Detector Calibration Lab in Thailand
ThaiLabHub lists ISO 17025-accredited calibration laboratories across Thailand. Search our directory to find labs that offer gas detector services, with scope details, location, and contact information.
For Labs: Manage Gas Detector Jobs with LabSync
LabSync helps Thai calibration laboratories manage jobs, issue traceable certificates, calculate GUM uncertainty budgets, and generate Thai tax reports (PP30 + WHT) — all in one system.
Frequently Asked Questions
Why is it important to calibrate a Gas Detector?+
Analytical measurements underpin quality control decisions, safety assessments, and regulatory submissions. An uncalibrated Gas Detector produces data that cannot be trusted or defended in an audit. Calibration verifies performance to ±5% of reading per EN 45544, IEC 60079-29-1, ISO/IEC 17025.
How often should a Gas Detector be calibrated?+
Most Gas Detectors should be calibrated every 6–12 months under normal operating conditions. High-use environments, harsh conditions (vibration, temperature extremes), or regulatory requirements (FDA, GMP, ISO 17025) may necessitate more frequent calibration. Always follow the manufacturer's recommended interval as a baseline and consult your lab's quality plan.
What does a Gas Detector calibration certificate show?+
A calibration certificate issued under ISO/IEC 17025 includes: the instrument identification (make, model, serial number), the reference standards used (with their own traceability chain), the measurement points tested, before/after correction values, the expanded measurement uncertainty (±5% of reading), the environmental conditions during calibration, the calibration date and next-due date, and the signature of the authorized calibration engineer. This certificate is the evidence required for audits and accreditation.
Related Calibration Services
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