ATD 3705 Coolant & Battery Refractometer

Features:
High-quality refractometer offers a fast, easy way to test the freezing point of coolant/anti-freeze
Works with Ethylene or Propylene Glycol anti-freeze
Not for use with OAT coolants or DEF
Also measures battery acid gravity to determine battery life
Automatic temperature compensation
Large, easy-to-read graphics and high-contrast lens
Adjustable viewfinder; rugged, steel body construction
Includes storage case, fluid dropper, cleaning cloth and mini screwdriver

Specifications:
Range:
Ethylene Glycol: -84°F to 32°F
Propylene Glycol: -60°F to 32°F
Battery: 1.100-1.400 Specific Gravity
Minimum Division:
Ethylene Glycol: 5°F
Propylene Glycol: 5°F
Battery: 0.01 Specific Gravity

Accuracy:
Ethylene Glycol: ±5°F
Propylene Glycol: ±5°F
Battery: ±0.01 Specific Gravity