... printing, metallurgy, pharmacy, fermentation, chemical industry, water and other solution PH value of the online detection,swimming pool.Main technical parameters ... :1.Measuring range: -2.00 ~ 16.00 PH, - 1999 ~ 1999 mv (ORP), -10~130.0°C2. ... size: 92x92mm17.Weight: 0.9 Kg High accuracy online PH controller/PH probe/water treatment PH analyzer with signal output 4-20mA