Calibration of gas detectors and breathalysers sits at the intersection of public safety, occupational health, and law enforcement. These instruments are used to detect hazardous gases in workplaces and to measure blood alcohol concentration (BAC) in drivers.
Because their readings directly influence safety decisions—and, in the case of breathalysers, legal outcomes—their accuracy must be beyond question. Accreditation of calibration laboratories in this scope, typically against ISO/IEC 17025, provides formal assurance that laboratories are technically competent to calibrate these instruments and produce reliable, traceable results.
ACCREDITATION SCOPE UNDER ISO/IEC 17025
Within this accreditation scope, laboratories perform calibration of:
- Gas detectors (fixed and portable) for gases such as carbon monoxide, methane, hydrogen sulfide, and oxygen
- Breathalysers used by traffic enforcement agencies
- Supporting equipment such as gas flow controllers and calibration gas delivery systems
The calibration process involves exposing instruments to certified reference gas mixtures of known concentration and verifying that the instrument readings fall within acceptable limits. Through accreditation, the results issued by these laboratories are recognized as credible, consistent, and internationally acceptable.
Importance of Accreditation in this Scope
- Protection of Human Life and Safety: Gas detectors are critical in industries such as oil and gas, mining, manufacturing, and confined space operations. Inaccurate readings can lead to undetected gas leaks, explosions, or toxic exposure.
- Integrity of Law Enforcement: Breathalysers are widely used in enforcing drunk-driving laws. Calibration accuracy is essential because results may be used as legal evidence.
- Regulatory Compliance: Many safety and environmental regulations require regular calibration of gas detection equipment.
- Confidence in Measurement Results: Accreditation builds trust among regulators, industries, and the public by ensuring calibration results are technically valid and traceable.
- Risk Management and Operational Continuity: Accurate gas detection supports early warning systems, allowing organizations to respond promptly to hazardous situations.
