Extech RF40 Portable Coolant & Battery Acid Refractometer with ATC - Freeze Point Tester for Glycol Coolant & Battery Specific Gravity - Handheld, Case + Solution Included

Product Description This portable battery coolant/glycol Refractometer is easy to operate refract meters provide accurate and repeatable measurements on easy to read scales. The RF40 measures the freezing point of automotive coolants (propylene glycol and ethylene glycol) and indicates the specific gravity of battery acid and provides a quick reference of battery charge condition. Complete with one year warranty, case, calibration screwdriver, plastic pipette and calibration solution. From the Manufacturer The RF40 measures the freeze point of automotive coolants (propylene glycol and ethylene glycol) from 32°F to -60°F. It also indicates the specific gravity of battery acid and provides a quick reference of battery charge condition. It only requires a sample of 2 or 3 drops for fast and accurate readings. Automatic Temperature Compensation provides repeatable results. Comes complete with storage case and a screwdriver and vial of distilled water used for calibration.

• Dual-Function Refractometer - Measures glycol coolant freeze point (propylene & ethylene glycol from -60 °F to 32 °F) and battery acid specific gravity (1.15 to 1.30), ideal for automotive, marine, HVAC, and maintenance applications.
• Automatic Temperature Compensation (ATC) - Delivers accurate, repeatable readings without manual adjustment across 50 to 86 °F (10 °C to 30 °C), simplifying field diagnostics.
• Quick, Precise & Minimal Sample Required - Requires only 2-3 drops of fluid; easy-to-read optical scale with simple focus adjustment on prism ensures fast, reliable results.
• Robust, Portable Design - Lightweight (~7 oz / ~180-200 g), compact dimensions (~6.2-6.5 × 1.5 × 1.5 in.), and includes protective carrying case, calibration screwdriver, pipette, and calibration solution—ready for the job.
• Trusted & Durable Instrument - Backed by Extech/FLIR craftsmanship, this refractometer includes a 1-year warranty for reliable long-term performance.