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Overview

Check four vital fluids with one handheld tool. This 4 in 1 refractometer measures the freezing point of glycol antifreeze, battery acid specific gravity, windshield washer fluid and diesel exhaust fluid concentration. Automatic temperature compensation gives fast, accurate readings, and it comes in a protective case for the garage or shop.

New 2026/27 Edition — 4 in 1 Antifreeze Coolant Refractometer for Cars Tests Diesel Exhaust Fluid Battery Acid and Windshield Washer Fluid with Automatic Temperature Compensation

Model: REFRC-456
Web Code: 20231894
Sold and shipped by | 4.5 seller rating (348 reviews)

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Warranty Information

Check with the manufacturer for details.

For Quebec residents: See the Availability Guarantee disclosure in the Specifications section below.

• Four Tests in One: One tool tests antifreeze, battery acid, washer fluid and diesel exhaust fluid.

• Antifreeze Freeze Point: Measures the freezing point of ethylene and propylene glycol antifreeze.

• Battery Acid Check: Reads battery acid specific gravity for a quick view of the charge condition.

• Washer Fluid Test: Checks ethanol and isopropyl washer fluid protection down to cold temperatures.

• DEF Concentration: Measures diesel exhaust fluid concentration in the 30 to 35 percent range.

• Auto Temperature Comp: Automatic temperature compensation delivers accurate readings fast.

• Just a Few Drops: Only a few drops of fluid on the prism are needed for a clear reading.

• Compact and Durable: A solid 6.5 inch body is light, durable and easy to hold in one hand.

• Garage and Shop Ready: Ideal for mechanics, fleet owners and DIY drivers doing seasonal checks.

For Quebec residents – Disclosure under the Consumer Protection Act

In compliance with Bill 29, Best Buy and third-party sellers on Best Buy Marketplace do not guarantee the availability of replacement parts, repair services, or maintenance information for any products. Coverage provided through any Best Buy Protection programs and applicable manufacturer warranties, if any, remain in place. Please contact the manufacturer directly for information about their availability guarantee.

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Processing Time

Most items ship within 2 business days after an order is placed*. Allow additional time for shipping to your address.
*Please note: If an item you ordered becomes unavailable, you'll be notified and a full refund will be processed within 2 business days.

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See our return policy to find specific return information for this product and steps on how to return by mail.