Atago PAL-91S Digital Ethylene Glycol & Antifreeze Refractometer

The Atago PAL-91S is a professional-grade digital handheld refractometer specifically engineered for measuring the concentration and freezing point of Ethylene Glycol, the primary component in antifreeze and cooling solutions. From automotive radiators to central air conditioning systems and industrial cooling coils, this instrument provides critical data to prevent system freeze-ups. It measures Ethylene Glycol concentration (% V/V) and determines the freezing point from 0 to -50°C in just 3 seconds.

Designed for rugged industrial and field use, the PAL-91S features an IP65 water-resistant rating, allowing the entire unit to be safely rinsed under running water for maximum hygiene and maintenance. The Automatic Temperature Compensation (ATC) ensures consistent accuracy within a 10°C to 40°C range, eliminating errors caused by fluctuating environmental temperatures. Requiring only a minimal 0.6 mL sample and powered by two AAA batteries—offering up to 11,000 measurements—the Atago PAL-91S combines laboratory-grade precision with the portable durability required for professional coolant diagnostics.

Technical Specifications:

• Brand / Model: Atago PAL-91S (Ethylene Glycol Series)

• Scales: Ethylene Glycol Concentration (% V/V) and Freezing Point (°C)

• Concentration Range: 0.0% to 90.0% (V/V)

• Freezing Point Range: 0 to -50°C

• Accuracy: ±0.4% (Concentration) / ±1°C (Freezing Point)

• Resolution: 0.2% (EG) / 1°C (Freezing Point) / 0.1°C (Temperature)

• Measurement Time: Approx. 3 seconds

• Temperature Compensation: 10 to 40°C (Automatic)

• Protection Class: IP65 Water-resistant (Washable)

• Power Supply: 2 x AAA Batteries (Up to 11,000 measurements)

• Dimensions / Weight: 10.9 x 5.5 x 3.1 cm / 120 g