1780 North Cedar Ave. Owatonna, MN 55060 507.451.8537

Laxco Industrial RHA Series Automotive Fluid Tester Refractometer

Laxco Automotive Refractometer
Laxco Automotive Refractometer
Laxco refractometer with nylon padded zipper pouch
Laxco RHB Refractometer close up of daylight plate
Refractometer replacement daylight plate comparison
Laxco RHB Refractometer top and bottom views


  • RHA-100ATC: $88.00

Laxco Industrial RHA Series Automotive Fluid Tester Refractometer

Ensure the proper dilution of antifreeze or check the charge level of battery acid. The antifreeze scales measure ethylene & propylene glycol in both freeze point degrees Fahrenheit and the ratio of water to glycol.

  • Quality new style refractometers, not the old style
  • Durable, all metal construction
  • Water-resistant seal between prism and main body to protect internal lens
  • Smooth focusing eyepiece with rubber eyecup
  • Metal footrest allows the instrument to be set on a flat surface without rolling off
  • Simple calibration with tap water with easy access to calibration screw
  • Simple to use with easy-to-read instructions
  • No batteries needed – uses only sunlight or indoor lighting for accurate readings
  • Three scales: Ethylene Glycol, Propylene Glycol and battery charge indicator
  • ATC or automatic temperature compensation allows for shifts in ambient working temperature without recalibration
  • Includes calibration screwdriver, plastic pipette, and nylon padded zipper pouch
  • Backed and inspected by Laxco, formerly Westover Scientific and Advanced Microscopy Group (AMG)
  • RHA-100ATC Automotive Fluid Tester, Fahrenheit  $88.00
    • with 3 scales: ethylene glycol, propylene glycol, and battery charge indicator

    • with automatic temperature compensation




  • RP-DPA-2  Daylight plate assembly  $23.95
    • Clear & silver w/screw
    • New Style, 2-pack
  • RP-DPHB32  Daylight plate assembly  $19.95
    • Clear & black w/pin
    • Old Style, 2-pack

Link to Purchase Daylight Plate Assembly