On behalf of the President of the Central Office of Measures (GUM), we provide:
Re-verification of automotive exhaust analyzers
Calibration of gas composition analyzers
Authorization for re-verification of automotive exhaust analyzers – President of GUM – [link]
Within the accreditation of the Polish Centre for Accreditation we provide:
Calibration of automotive exhaust analyzers
Calibration of gas composition analyzers
Calibration of gas composition analyzers is performed for the gas mixtures listed below. The ranges accredited by PCA [link] are shown in green.

| Gas [unit] | Value | In terms of 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 |
Outside the scope of accreditation
we also provide calibrations for other components and ranges:
- Calibration of gas concentration meters
- Testing of gas detectors (also on-site at the place of installation)