Vetlab Refractometer
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Vetlab Refractometer

Veterinary Refractometer

The Vetlab veterinary refractometer is a lightweight, hand-held diagnostic instrument designed for fast, simple and inexpensive measurement of Serum/Plasma Protein and Urine Specific Gravity on samples from animals. This refractometer has a good quality, robust build and comfortable design, which ensures that it will give you many years of valuable, low-cost diagnostic testing.

Special Features

Importantly, this veterinary refractometer features temperature compensation calibration using a special adjustment screw to zero on distilled water at ambient temperature.

In addition, the Vetlab Refractometer has a large rubber eyepiece for comfort and focusing, a rubber hand grip end with three scales: covering the whole barrel for easy handling. It also features a high quality blue coloured prism engraved with three scales: For Serum Protein / Specific Gravity / Refractive Index and an integral sample cover lid.

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Measuring Urine Specific Gravity

Useful for detecting kidney disease and, in particular, to test the ability of the kidneys to concentrate urine in water deprivation tests. It is also useful for the diagnosis of diabetes insipidus. Finally, it is important to remember that Urine Specific Gravity in animals must always be measured by refractometer.

Measuring Serum/Plasma Protein

Useful in an emergency situation as a guide because results are only approximate as other total solids can interfere, often making the results higher than they actually are.

Nevertheless, when performed on a clear plasma layer of a centrifuged haematocrit capillary the result is very useful (especially if the animal is anaemic) in helping in the diagnosis of dehydration or chronic inflammatory disease (high plasma protein), excessive loss of protein (renal, intestinal, haemorrhage) or decreased protein synthesis. (Please remember that plasma will have a higher protein value than serum due to the fact that it contains fibrinogen and serum does not).

 Measuring Total Solid (Total Proteins) Using a Veterinary Refractometer


You may also be interested in our Urine Test Strips, follow this link

How to use a veterinary refractometer


Instructions for Use


Open the sample cover lid and add 2-3 drops of distilled water at 20◦c of prism. Close lid.
Allow the water to adjust to room temperature for 60 seconds. Hold the prism towards a light source and look into the eyepiece. Focus (by turning the eyepieces) onto the three scales. You will see an upper blue section and a lower white section. Take a reading at the boundary line where they meet. Turn the calibration screw, whilst viewing, until the boundary lines align with the ‘1.000’ mark. This now completes the calibration which from now on will be adjusted for both Specific Gravity and Protein Scales to compensate for the ambient temperature (10◦c - 30◦c).

Reading Sample

Follow the steps above using the sample and read off the result where the boundary aligns on the appropriate scale. (Protein = Left hand scale S.G = Right hand scale)

Cat NoDescriptionPrice
1841Vetlab Refractometer£39.00 (ex VAT)
1845Vetlab Refractometer Plastic Flap x 1 £8.50 (ex VAT)