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Coolant Refractometer - 3705

SKU #ATD-3705
  • Description
  • Reviews
  • Tech Sheets

Test the freezing point of coolant/anti-freeze (Ethylene or Propylene Glycol)

  • 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
  • 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


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

WARNING WARNING: This product can expose you to Di(2-ethylhexyl)phthalate (DEHP) a chemical known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to

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