Established in 1987, HM Digital, Inc. (formerly known as Heemang Electronics) is an original equipment manufacturer (OEM) that has been recognized worldwide for providing the best values in water testing instrumentation, especially the increasingly popular TDS meter.
The HM Digital PH-200 high end Combo pH and Temperature meter. This quality pH meter has a resolution of pH 0.01/ 0.00 - 14.0pH ...More
Replacement HM-Digital pH Sensor for the HM Digital PH-200 high end Combo pH and Temperature meter. More