$21.99 Refractometer for Battery, Anti-freeze, and DEF
Check out this $21.99 refractometer on Amazon. Lotta bang for the buck. Received it yesterday. Seems reasonably well-made and appears to work as advertised.
Forum Discussion
brulaz wrote:I have only had one go out of calibration. It was a shop refractometer so it gets abused. Always good to check.
So how do you guys calibrate these things for, say, battery sp.gr. ?
They do have to be calibrated every once and a while, right?
