❄️⚡ Stay cool and charged with precision in your pocket!
The Extech RF41 is a portable refractometer designed for professionals to accurately measure the freezing point of propylene and ethylene glycol coolants and the specific gravity of battery acid. Featuring automatic temperature compensation between 10-30°C and requiring only a few drops of sample, it delivers fast, reliable, and repeatable results in a compact, easy-to-use form factor.
H**C
Purchased for Glycol/ Battery testing
Product appears to be of high quality, nice plastic case and easy to follow instructions.Have used this tester twice and have positive results!
D**R
A GREAT tool!!
As an RV tech, I use this tool to check the specific gravity of the house and chassis batteries on any RV that I am working on. Much more accurate than just using a DC Volt meter or hydrometer. Easy and quick to use. I can check all of the cells in just a few minutes. Highly recommended to anyone who deals with lead-acid batteries on a regular basis!
D**A
Satisfied.
Arrived on time. Seems well made. Works well. Reads accurate. Satisfied.
A**R
very nice, worth the coin
Instrument was shipped on time, and was exactly as advertised. I use it to measure glycol levels in hydronic heating systems and it works perfectly every time. Comes in a nice hard plastic case with tools to clean and adjust if necessary.
C**A
Convenience and Accuracy
Bought for use at my off-grid solar powered vacation home.Much easier to take and record accurate specific gravity readings on my batteries. With this easy to use tool I'll be more diligent about watching out for my batteries' health.Recommended.
S**M
Three Stars
As expected
H**E
handy device
love it works great easy to use and calibrate
T**C
The featured metal body looks amazing, it's very easy to use and it's very ...
This tool is a jewel ! The featured metal body looks amazing, it's very easy to use and it's very accurate. I love it !
Trustpilot
1 month ago
2 days ago
