Certificate of Calibration

All Eclipse and OPTi handheld refractometers sold by us at Refractometer Shop will have a unique serial number and come supplied with a Bellingham + Stanley Certificate of Calibration. Each certificate ensures that every instrument you buy is traceable to NIST and ICUMSA standards.

During the calibration process we use B+S Sucrose calibration fluid prepared within Bellingham + Stanley’s UKAS accredited calibration laboratory no. 0834, accredited to ISO/IEC 17025:2017 using high purity analytical grade (AnalaR NORMAPUR®) water and sucrose.

B+S Calibration Oils are mineral oils analysed using a high accuracy refractometer with measurements taken at 589.3nm and 20.0°c following B+S Laboratory Procedure QL-102.

The Certificate of Calibration is supplied free of charge to customers of Refractometer Shop on their initial purchase of a refractometer. Recertification is available at the standard retail price of £59.99 per certificate. Please contact us directly if this is something you require.