The physicochemical value reproduced by the standard is specific electrolytic conductivity ĸ. It is expressed in the SI units: S/m. The values of certified specific electrolytic conductivity are traceable to the DFM's (Danish Fundamental Metrology) and GUM's (Central Office of Measures in Poland) standards. Conductometric standards are distributed in 100 cm3, 250 cm3 and 500 cm3 packages, and are designed for the determination of the conductivity cell constant for the measurement of the electrolytic conductivity.
LIST OF CONDUCTOMETRIC STANDARDS
|
No |
TYPE |
Nominal specific electrolytic conductivity ĸ (25oC) |
Expanded uncertainty (k=2) |
|
1 |
BLS 009K.001 |
0,01 |
0,4 |
|
2 |
BLS 009K.005 |
0,05 |
0,4 |
|
3 |
BLS 009K.010 |
0,1 |
0,4 |
|
4 |
BLS 009K .015 |
0,15 |
0,4 |
|
5 |
BLS 009K.050 |
0,5 |
0,4 |
|
6 |
BLS 009K.100 |
1,0 |
0,4 |
|
7 |
BLS 009K.500 |
5,0 |
0,4 |
|
8 |
BLS 009K.1000 |
10,0 |
0,4 |
We produce reference materials with non-standard values (other than in the table above) falling within the range (0.008 ÷ 12.0) S/m on special order.
The CRM conductivity certificate is issued as a reference material certificate confirming its metrological properties including PCA accreditation symbols, that confirm compliance with the requirements of ISO 17034 for manufacturers of reference materials.
For conductivity reference materials, a reference material certificate can be issued for compliance with ISO 17025, which shows metrological properties with PCA accreditation symbols based on the signatory status of multilateral EA-MLA and ILAC-MRA agreements on mutual recognition of calibration certificates.
