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Model#: ATDN3705

What are the different product conditions?

Brand new items;Full manufacturer warranty available
Manufacturer inspected, repaired and tested items; CPO 120 day money back guarantee
Open Box
New items with possible minor cosmetic damage; CPO 120 day money back guarantee
Returned items inspected, repaired and tested by CPO technicians; CPO 60 day money back guarantee

ATD 3705 Coolant Refractometer

  • ATD 3705 Coolant Refractometer
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Since 1977, ATD Tools has focused on providing professional automotive tools and equipment at competitive prices. More than three decades later, ATD is still committed to providing the quality tools you need at a price you can afford.
  • Offers a fast, easy way to test the freezing point of coolant/anti-freeze
  • Works with Ethylene or Propylene Glycol anti-freeze
  • Also measures battery acid gravity to determine battery life
  • Automatic temperature compensation
  • Large, easy-to-read graphics and high-contrast lens
  • Adjustable viewfinder with a rugged, steel body construction
  • Not for use with OAT coolants
  • Coolant Refractometer - 3705
  • Fluid Dropper
  • Cleaning Cloth
  • Mini Screwdriver
  • Storage Case
Compliance and Restrictions
warning: This product can expose you to Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause Cancer. For more information go to


Accuracy - Battery: -/+ 0.01 Specific Gravity
Accuracy - Ethylene Glycol: -/+ 5 deg. F
Accuracy - Propylene Glycol: -/+ 5 deg. F
Min. Division - Battery: 0.01 Specific Gravity
Min. Division - Ethylene Glycol: 5 deg. F
Min. Division - Propylene Glycol: 5 deg. F
Range - Battery: 1.100 - 1.400 Specific Gravity
Range - Ethylene Glycol: -84 - 32 deg. F
Range - Propylene Glycol: -60 - 32 deg. F



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