Robinair Precision Auto Refractometer Kit

Last updated: November 1, 2023

Robinair Precision Auto Refractometer Kit

We looked at the top Refractometers and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Refractometer you should buy.

Product Details

In our analysis, the Robnair Robinair Precision Auto Refractometer Kit placed 9th when we looked at the top 12 products in the category. For the full ranking, see below.

From The Manufacturer

Robinair’s No. 75240 Coolant and Battery Refractometer is designed for use in measuring the freeze point of propylene or ethylene glycol based cooling systems and for checking the strength of electrolyte solution batteries. This precision instrument features high-quality optics with ultra smooth focusing. Scale range: -60 degrees Fahrenheit to +32 Fahrenheit. This handheld refractometer is a portable, precision optical instrument used for measuring the freeze point of engine coolant and the operating state of battery charging liquid. It is used on transportation vehicles, such as cars, tractors, tanks, ships, etc., which use propylene or ethylene glycol for coolant and sulphuric acid for charging liquid. When a liquid (such as coolant or charging liquid) is placed on the prism, the light passing through it is bent. The more concentrated the liquid, the more the light will bend. The refractometer contains a reticle, or scale, that is enlarged through the eyepiece to measure this bent light. The values of the scale have been established to evaluate the coolant or charging liquid. Complete kit includes refractometer with rugged aluminum housing, eyedropper, screwdriver, vial of distilled water, cleaning cloth, foam lined rigid plastic case, and complete usage instructions. Robinair, a Bosch Automotive Service Solutions brand, is a global leader in service tools and equipment based in Owatonna, Minnesota. Robinair is recognized throughout the world as the quality and performance leader in AC/R evacuation tools and this position has led to its success with the full range of products that serve the heating/ventilating/air conditioning/refrigeration (HVAC-R) and mobile markets, which includes the automotive aftermarket along with other industries such as agriculture and construction.

Expert Reviews

What reviewers liked

Comes with a variety of helpful accessories like a foam-lined carrying case, a cleaning cloth, and a vial of distilled water to help you calibrate the refractometer. Unlike some other options, the refractometer has both Fahrenheit and Celsius scales for propylene and ethylene. There’s also a scale for battery acid.

What reviewers didn't like

More expensive than many of the other options.
View our Refractometer buying guide for in-depth advice and recommendations.

From our partners