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Which HM Digital products are right for you?

TDS testers for water professionals or health-conscience consumers and an industrial-grade thermometer. Convenient devices to monitor the performance of filters and Reverse Osmosis (RO) systems.   Control the output performance of high volume commercial water purification systems.   Give powerful visual presentations on the differences in water quality between tap water and pure water.
TDS Meter 3 DM1: Dual TDS Monitor   PS 100: Panel Mount Controller   Precipitator 1
TDS Meter 3

  PS100: Panel Mount Controller  
TDS Meter 4 DM2: Dual TDS Monitor 2   PS 200: Dual TDS Controller   Precipitator 2

TDS Meter 4

  PS200: Dual TDS Controller   Precipitator 2
TDS Meter 4TM Clean Tap Monitor   PS 202: Dual Display TDS Controller    
TDS Meter 4TM Clean Tap Water Monitor   PS202: Dual Display Panel Mount TDS Controller   ACCESSORIES
EC / TDS / TEMP Meter Reverse Osmosis (RO) Monitor   PC 100: Conductivity Controller   Calibration Solutions
EC / TDS / TEMP Meter Reverse Osmosis Monitor   Conductivity Controller   Calibration Solutions
Industrial-Grade Thermometer FM-1: Filter Monitor   CIC-150: Dosing / Injection Controller   Sensors
Industrial Grade Thermometer     Sensors
AP-1: AquaPro Water Quality Tester (TDS) FM-2: Filter Monitor with Volumizer   PSC-150: Extended Range EC/TDS Controller    
AP-2: AquaPro Water Quality Tester (EC)   QC-1: Quick Check TDS/Conductivity Monitor   PSC-154: TDS/EC Controller with 4-20mA Output    
EC-3: Handheld Conductivity Tester with Case   SM-1: In-Line Single TDS Monitor      
TDS-EZ Water Quality Tester            
Our water quality testing instruments, including our handheld TDS meters, water meters, in-line TDS monitors, controllers and demonstration devices for reverse osmosis (RO) water filters and water purification systems are superior in construction and performance, yet made available at a very economic cost. HM DIGITAL is the only manufacturer of economical in-line dual TDS meters 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.

While a handheld TDS meter or pocket TDS tester is perfect for measuring the water quality in your home or water quality anywhere on the go, our inline TDS monitors and water meter are designed for measuring the quality of a filter or membrane for a reverse osmosis and other water filter or water purifier. Our TDS controllers are designed to control the level of total dissolved solids for commercial water purification systems.


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