I purchased a Digital Salinity tester, and a Digital PH tester, to hopefully ease in some of the testing...
The salinity tester seams to be mostly accurate +/- 0.02 SG
. According to the manufacturer its suppose to be more accurate than a refractometer. Before my Refractometer broke, I compared its results with my Swing arm hydrometer, and the results were almost identical. The results from the digital tester are +/- 0.02 SG
from my Swing Arm Hydrometer.
The Digital PH tester, I don't have really anything to compare it with, other than the liquid test, but that's hard to get a distinctive result from..
The Digital Salinity tester comes with a controll 30ppm solution to calibrate the tester. The PH tester has a small screw driver to adjust the calibration, but doesn't have a test solution to calibrate with.
Does anyone have any experience with thease type of testers? Does anyone know how I should go about checking the calibration on the PH tester?
Are thease devices Trustworthy?