FLIR Extech RF40 Refractometer Application Inquiries

Some common questions we receive about the RF40 refractometer from FLIR Extech are collected below.

  • How to read the reading below via RF40, Battery Coolant Refractometer?
    The RF40 User’s Guide explains how to operate the refractometer.

  • I would like to check on the CNC coolant concentration, what should be the reading after conversion to Brix%
    This refractometer does not give a Brix reading. It is meant to give dilution percentages of ethylene glycol and propylene glycol directly.

Applicable part number

RF40-ND