Scope of Calibration of Gas Concentration Meters
During gas concentration meter calibration, the instrument readings are compared with reference values obtained using appropriate reference standards. The calibration results allow the difference between the reading of the tested meter and the reference value to be determined for specified gas concentrations.
Calibration Laboratory AP 002 performs calibration of single-gas and multi-gas concentration meters, including instruments designed to measure toxic gases.
We calibrate instruments measuring, among others, CO, CO₂, O₂, NO, NO₂, SO₂, and CH₄. Calibrations are performed within the scope of accreditation of the Polish Centre for Accreditation (PCA), and for selected quantities also outside the scope of accreditation.
What Types of Gas Concentration Meters Do We Calibrate?
The service is intended primarily for instruments that provide the measured gas concentration as a numerical value.
We calibrate, among others:
- gas concentration meters,
- single-gas meters,
- multi-gas meters,
- toxic gas meters,
- instruments measuring several gas components.
The possibility of calibrating a gas concentration meter depends on the gas being measured, the meter’s measurement range, and its design.
Gas Concentration Meter Calibration vs. Gas Detector Testing
A gas concentration meter and a gas detector may use similar sensors, but they do not always serve the same purpose.
Calibration primarily applies to instruments that measure gas concentration and display the measurement result. For devices primarily intended to detect the presence of gas or indicate that an alarm threshold has been exceeded, the appropriate service may be gas detector testing or adjustment.
More information about the differences between the various types of devices can be found on the Gas concentration meter or gas analyzer – what’s the difference? (click for more).
Documentation After Calibration
After calibration has been completed, the customer receives a calibration certificate containing the measurement results and their corresponding measurement uncertainties. Upon request, we can also determine a linear regression.
If the tested instrument does not present any technical problems, calibration is usually completed within 3 days.
How to Order Calibration?
Detailed instructions and contact information for laboratory staff can be found in the Laboratory / For Customers (click for more).

| Gas [unit] | Value | Covered by accreditation |
|---|---|---|
| CO [ppm] | 5000 | Yes |
| SO2 [ppm] | 3000 | Yes |
| NO [ppm] | 2000 | Yes |
| NO2 [ppm] | 200 | Yes |
| O2 [%] | 30 | Yes |
| CO2 [%] | 30 | Yes |
| CH4 [%] | 2,5 | Yes |
| H2S [ppm] | 50 | No |
Activities not covered by accreditation
we also provide calibrations for other components and ranges:
- calibrations for selected gas components and measurement ranges outside the scope of accreditation
- Testing of gas detectors (also on-site at the place of installation)