Hanna HI98319 Marine Salinity Tester Checker

Poor accuracy. Doesn’t calibrate

I can confirm the seller sent an authentic product, they listed it in an odd location. It doesn't deserve a 1 star because it's known these calibrate LOW. My refractometer says 1.026 but this meter says 32.5 after calibration. No big deal. Once I make water I'll verify and cross reference the number a few times and verify it always says 32.5, if it does then I'll update this to 5 stars.

You have to keep it calibrated and make sure you clean it properly after every use but one of the best way to check your salinity