Review on Extech RF40 Battery Coolant Refractometer by Scott Ward
GREAT tool!: Refractometer
As an RV specialist, I use this tool to test the battery density of a RV and the chassis of every RV I work on. Much more accurate than just a DC voltmeter or hydrometer. Easy and quick to use. I can check all the cells in just a few minutes. Recommended for anyone who deals with lead-acid batteries on a regular basis!
- Testing, Measuring and Inspecting
- So far so good
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