HM Digital TRM-1 Inline 3 Probe TDS Meter with 0.25 Quick-Connect Fit – SpectraPure, Inc.

SpectraPure, Inc. is an Industry Standard in the Water Purification world. From Drinking Water to Aquarium Systems, you don't just want pure water, you want the PUREST Water! Get it with SpectraPure!

HM Digital DM-1 In-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy,Blue & White : Patio, Lawn & Garden

reflectors - Hydrofarm

HM Digital DM-1 In-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy,Blue & White : Patio, Lawn & Garden

HM Digital TDS-3 Handheld TDS Meter - 0-9990 ppm -MTR-TDS-TDS3 – SpectraPure, Inc.

Hydrofarm 2014 catalog by Kris Schuler - Issuu

HM Digital Triple Inline RO/DI TDS Monitor with 1/4 inch T-Fittings : Industrial & Scientific

HM Digital Meters

HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDS Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy : Industrial & Scientific

HM Digital TRM-1, 3X 1/4 Tee, Triple Inline TDS PPM Monitor/ Meter : Industrial & Scientific

HM Digital, Inc. Water Quality Products

HM Digital TRM-1, 3X 1/4 Tee, Triple Inline TDS PPM Monitor/ Meter : Industrial & Scientific

HM Digital Meters