Calibration and Services
Refractometer Calibration

 

Users of refractometers for the testing of Diesel Exhaust Fluids require some specific calibration materials. Manufacturers need an extremely high accuracy CRM to comply with ISO22241-2, whilst users in the field need longevity of product.

Bellingham + Stanley offer two product types based on existing fluids that have an equivalent refractive index to 32.5% Urea.

Manufactured in accordance EN ISO/IEC 17025:2005, these CRM’s are supplied with a UKAS Certificate showing traceability to NIST and ICUMSA at 20°C and 589nm.

Due to its relatively short shelf life and limited application, ss-aus may only be purchased on a Supply Contract basis, where a single purchase order commits to the supply on a bi-weekly, monthly or quarterly basis over a 12-month period. 

 

Order Code Type Value (RI) Vessel Volume Uncertainty (RI: k=2) Shelf Life 18-50 SS-AUS 1.38290 Plastic 15ml ±0.000011 6-weeks 90-421 BS-AUS 1.38290 Glass 1 x 5ml ±0.000034 12-months 90-521 BS-AUS 1.38290 Glass 5 x 5ml ±0.000034 12-months

Uncertainties:
The reported expanded uncertainty of measurement is stated as the standard uncertainty of measurement in units of °Brix (equivalent to weight % sucrose in water) multiplied by the coverage factor k=2, which for a normal distribution corresponds to a coverage probability of approximately 95%. The standard uncertainty of measurement has been determined in accordance with publication EA-4/02.