4-in-1 Automotive Antifreeze & Battery Fluid Refractometer

Accurately check antifreeze, battery fluid and coolant in minutes

with this 4-in-1 Automotive Refractometer. Designed for everyday vehicle owners and workshop use, it gives clear, fast readings for antifreeze concentration, battery electrolyte, glass cleaner freezing point and AdBlue (4-in-1 model), helping you keep engines protected in all seasons.

This handheld refractometer measures the concentration and freezing point of ethylene glycol and propylene glycol antifreeze from -50 to 0°C, allowing you to verify correct coolant mix for winter protection and summer cooling efficiency. It also checks cleaning fluids (such as windshield washer solution) from -40 to 0°C, so you can confirm that washer fluid will not freeze in low temperatures. For lead-acid batteries, the instrument measures electrolyte specific gravity from 1.10 to 1.40 sg, giving a quick indication of charge condition and helping identify weak or failing batteries. The 4-in-1 version also includes a scale for AdBlue at 30%-35%, supporting correct urea concentration checks in compatible diesel systems.

The optical system is equipped with a clear, sharp reticle chart for easy reading, and the device uses only ambient light, so no batteries are required. Automatic temperature compensation helps correct for temperature variations during measurement, improving consistency in workshop or outdoor environments. The compact, durable body is designed for regular use in garages, service bays and home toolkits. Each unit comes with a pipette for sampling, a screwdriver for calibration, and a cleaning cloth to maintain the prism and lens in good condition.

Why It's a Smart Choice

• Supports multiple fluids in one tool: antifreeze, battery electrolyte, glass cleaner and AdBlue (4-in-1 model).
• Wide measurement ranges for glycol coolants and washer fluid freezing points to suit different climates.
• Battery-free operation with automatic temperature compensation for consistent, workshop-ready results.

FAQ

Q: Which vehicles can I use this refractometer on?
A: It can be used on most cars, trucks, vans, motorcycles and other vehicles that use glycol-based antifreeze, lead-acid batteries and compatible washer fluids. The AdBlue scale (4-in-1 model) is suitable for vehicles equipped with AdBlue/DEF systems.

Q: Does it require batteries or power to operate?
A: No. The refractometer uses ambient light only. Simply place a sample on the prism, close the cover and look through the eyepiece to read the scale.

Q: Can I calibrate the refractometer myself?
A: Yes. Calibration is typically done with distilled water and the included screwdriver. Adjust the calibration screw until the boundary line aligns with the zero mark on the relevant scale.

Q: Is it suitable for both ethylene glycol and propylene glycol coolants?
A: Yes. The instrument includes separate scales for ethylene glycol and propylene glycol from -50 to 0°C, allowing you to check either coolant type accurately.