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DM-1: In-Line Dual TDS Monitor - HM Digital
HM Digital$29.95The DM-1 is consumer friendly monitor measuring feed (input) water vs. product (output) water of a water filtration system at any time. This device is ideal for Reverse Osmosis (RO), Deionized water... -
pH Electrode Storage Solution - HM Digital
HM Digital$9.99PH storage solution for HM Digital’s PH-200 / PH-80 as well as other brands of pH meters. Always make sure your sensor is kept in an electrode storage solution. If dry, refill the pH meter cap...