Calibration and Services
Refractometer Calibration

 

Calibration Oils are one of the most commonly used materials for calibrating refractometers as they have good traceability, particularly to NIST. Having a high temperature co-efficient, calibration oils are used where strict temperature control is adopted, either by Peltier or external waterbath between 10 and 75 °C (from batches BSLP24 & BSDC17 onwards – previous batches between 20 and 75°C only). Calibration Oils are batch manufactured and so values may differ slightly from published data. Oils are supplied in multipacks of 5 x 5ml bottles with a certificate of calibration, MSDS and pipettes and have an expiry date 12-months from date of dispatch.

For refractometers operating at high temperatures where water starts to evaporate, an oil may be used as a zero calibration medium. Typical applications include those in the confectionery, edible oil and mineral oil marketplaces.

 

Order Code Description Specification Multi-pack of 5 x 5ml Bottles Calibration Oil Refractive Index* °Brix** 90-525 BSLP 1.46990 71.81 90-530 BSDC 1.52256 91.75 90-535 BSDD 1.56138 --.-- Maximum Uncertainty: ±0.000074 RI    ±0.030 °Brix Traceable to NIST. Note: (BSDD: ±0.000103 RI)   * Typical Refractive Index @ 589.3nm & 20.0°C. **Equivalent °Brix value @ 589.3nm & 20.0°C. All quoted values for calibration oils are subject to minor batch to batch variations.

Specification Certificate: UKAS (ISO17025) Uncertainty (k=2) (BSDD) ±0.000074RI ±0.030 °Brix (±0.000103RI) Shelf Life: 12-months (minimum) Storage: Room temperature. Keep sealed Traceability: ICUMSA NIST

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.

 

Calibration Fluids – Calibration Oils at temperatures other than 20°C. FAQ-GRP-049 (pdf)
Calibration Fluids – Use in glass free environment. FAQ-GRP-051 (pdf)