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Internet # 202735091

Model # REF401

Ethylene/Propylene Glycol Freezing Point Refractometer

$63.15
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  • Measures aqueous solutions by measuring its refractive index
  • Features a metal body, rubber hand grip blocks calibration screen
  • Used for ethylene, propylene glycol and brake fluid
  • View More Details

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Product Details

About This Product

Since 1910, General Tools has grown to become the recognized industry leader for specialty hand tools and instruments. This refractometer features a metal body with rubber hand grip blocks and a calibration screen. It also has a cushioned rubber eyepiece and a non-roll stand. The refractometer is mounted in high impact plastic. All water-based solutions can make light bend. The bending of light increases at a rate proportional to the increasing solution concentration. This glycol fluid refractometer is a precise optical instrument that measures the concentration of aqueous solutions by measuring its refractive index. Its characteristics are small and light; it only takes a few drops of solution to use and it is very user friendly.

Highlights

  • Has a metal body with a cushioned eyepiece, a rubber hand grip, and a calibration screen
  • Includes a calibration screwdriver, a plastic pipette and a carrying case
  • For ethylene and propylene glycol and brake fluid
  • Lightweight and easy to use
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 202735091

Model # REF401

Additional Resources

Shop All General Tools

Specifications

Details

Alarm

No

Indoor/Outdoor

Indoor/Outdoor

On-Unit Display

Analog

Pack Size

1

Plant Monitor Type

All Purpose

Power Type

Not Powered

Returnable

30-Day

Warranty / Certifications

Manufacturer Warranty

1 Year

Questions & Answers

Does this tool measure in Celsius or Fahrenheit?
ByApr 8, 2026
1 Answer | 
Answer This Question

Thanks for reaching out to us! This tool measures in Fahrenheit.

By|Apr 8, 2026


    Advertising says I can measure auto brake fluid water concentration ( up to 3-4%) with this. What reading corresponds to this?
    ByJun 7, 2023
    1 Answer | 
    Answer This Question

    This unit does not measure the water concentration of brake fluid. It looks like there is a typo on the Home Depot page, instead of "brake fluid" it should say "battery fluid". We do apologize for the confusion, and will have this corrected as soon as possible.

    By|Jun 14, 2023


      I am trying to determine which antifreeze has been used in my hot water heating system - ethylene glycol or propylene glycol. Will this refractometer be able to tell me that?
      ByMar 24, 2023
      1 Answer | 
      Answer This Question

      We do not make a model with the proper scales for performing this analysis. However, differentiating between the two is possible. Take a look at this article, https://www.richardhouriganinc.com/pdf/ETHYLENE_OR_PROPYLENE.pdf

      By|Mar 30, 2023


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        Customer Reviews

        3.3 out of 5

        • 3.3 out of 3 reviews
        • 100% recommend this product
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        Showing 1-3 of 3 reviews
        This customer chose to rate the product and not provide text.
        by
        • Verified Purchase
        It was backordered for three weeks...
        It was backordered for three weeks
        by
        • Verified Purchase
        Good instrument for the price
        Home Depot was an unexpected source for a glycol refractometer and the instrument had to be ordered in, however delivery was fairly quick and I was kept informed via email of the status every step. My only regret is that the refractometer is sold in a soft case (not noted in the description) and mine travels in my service van, so making a foam lined hard case will be necessary.
        by
          • Recommended
          Showing 1-3 of 3 reviews

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          Product Snapshot

          Ideal for measuring ethylene and propylene glycol freezing points with its analog display and easy-to-use design.
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          Wireless Connectivity

          Measurement Accuracy

          0º to 220ºF