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.

More Info

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 on the main 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)

Refractometer Operation Manual

Daylight Plate (Spare Part)

Refractometer Spare Daylight Plate

Click on the download below and follow these simple instructions on how to replace the daylight plate

How To Replace A Refractometer Daylight Plate

Cat NoDescriptionPrice
1841Refractometer RHCN-200ATC£39.00 (ex VAT)
1845Refractometer Spare Daylight Plate x 1 £8.50 (ex VAT)

COVID-19 Update

As the impact of COVID-19, is being felt around the world, the well-being of our employees and their families is of the highest importance to us.

By putting the safety of our employees first, we have reduced our on-site staff to a minimum and we will endeavour to maintain our business operations to the highest standard possible.

We are carefully monitoring and following official guidance from the UK Government, Public Health England, WHO and CDC guidelines and in line with these; we are currently operating business as usual.

We are monitoring our stock levels on a daily basis ensuring a fair distribution of our products. We are fully committed to maintaining the supply of products during these unprecedented times.

We are open for orders from Monday through to Thursday and closing on Fridays:

Friday Closure:  For any technical queries, orders or enquiries please do one of the following:
• Email:
• Fax: 01798 874787
• Telephone & leave a message: 01798 874567

We will endeavour to contact you on Friday and Monday if it is non-urgent.

If you require any further information, please contact Vetlab Supplies Ltd Customer Services on 01798 874567 or email

Thank you to all our customers and suppliers for their support during these temporary measures.

Stay Safe