WATER TESTING INSTRUMENTS
Our handheld and portable TDS, EC, pH and ORP testers, in-line monitors, controllers and accessories for reverse osmosis (RO) water filters, water purification systems, hydroponics, aquariums, pools and many other applications are superior in construction and performance, yet made available at a very economic cost. HM Digital, Inc. is the only manufacturer of economical in-line dual TDS monitors that measure total dissolved solids (TDS) levels of feed and product water lines simultaneously, an effective way to compare rejection rates and gauge reverse osmosis membrane, water filter and water purification performance.
With HM Digital water testing instruments, you'll know if your water is pure.
Product Highlight | Upcoming Events
New Product! EC-3M Conductivity Tester
The EC-3M is a handheld meter that measures Electrical Conductivity with a range of 0-9.99 millisiemens (mS). It includes a built-in digital thermometer and an easy-to-read LCD screen as well as a convenient vinyl carrying case with belt clip.Read More ...
Featured: pH Storage & Buffer Solutions
Our pH Electrode Storage Solution is ideal for lengthening the life of the probe on your PH-200 and PH-80 Meters, while our pH Buffer Solution Powder Packets provides an easy and convenient way for you to calibrate your meter(s) to pH 4.00 & pH 7.00.Read More ...