Calibration and Services – Refractometer Calibration

AG Fluids are an organic solution calibrated in °Brix and RI and have a long shelf life. Having a low °Brix/RI value, AG fluids provide a low cost alternative to sucrose solutions especially as they can be supplied in multi-packs of 5 or 20 5ml bottles, reducing the per bottle shipping cost. Multipacks are supplied with certificate of calibration, MSDS data and pipettes. They have no special storage or transit requirements and are therefore easy to ship and store.

AG Fluids are manufactured on a %weight/weight basis in a UKAS laboratory using only the highest quality chemicals and Analar® distilled water. Manufactured in large batches, the resultant samples are checked using a controlled refractometer that has been carefully calibrated with NIST and PTB primary standards, providing further traceability.  

However, AG Fluids have a refractive index/temperature co-efficient that is not the same as sucrose and so cannot easily be used on refractometers using sucrose temperature compensation. For further advise on the use of AG fluids, contact the Sales Team or use the FAQ system to determine whether AG Fluids can be used on a particular refractometer.

AG Fluids are especially suited for calibrating refractometers used as part of a system to determine alcohol in beer and wine as well as for instruments used in the beverage packaging industry.

Order Code Type Specification Single 5ml Bottle Multi-pack of 5 x 5ml Bottle Multi-pack of 20 x 5ml Bottles   Refractive Index* °Brix** 90-401 90-501 90-601 AG2.5 1.33659 2.50 90-402 90-502 90-602 AG5 1.34026 5.00 90-403 90-503 90-603 AG7.5 1.34401 7.50 90-404 90-504 90-604 AG10 1.34782 10.00 90-405 90-505 90-605 AG11.2 1.34968 11.20 90-406 90-506 90-606 AG12 1.35093 12.00 90-407 90-507 90-607 AG12.5 1.35171 12.50 90-408 90-508 90-608 AG15 1.35568 15.00 90-418 90-518 90-618 AG40 1.39986 40.00 Maximum Uncertainty: ±0.000037 RI    ±0.019 ºBrix Traceable to NIST. Note: * Precise refractive index @ 589.3nm & 20.0°C. ** Equivalent °Brix value @ 589.3nm & 20.0°C.

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.