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- HM Digital DM-1 In-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy
HM Digital DM-1 In-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy
HM DM-1Related Products
HM Digital Meter COM-80

HM Digital Meter COM-80
$32.75 $34.99
COM-80: EC/TDS HydroTester Series The COM-80 is easily the most advanced economically priced, reliable EC/TDS meter on the market. With its versatility and durability, it is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more. FEATURES: Mea...
HM Digital Meter TDS-3

HM Digital Meter TDS-3
$20.99 $21.99
TDS-3: Handheld TDS Meter with Carrying Case With its rugged design and build, the TDS-3 is an ideal meter (tool) that can be used for any application; Ranging from water purification, to hydroponics to industrial waste water treatment. It comes with a black vinyl carrying case, protecting it when carried in a toolbox. FEATURES: Hold Function A...
HM Digital ZT-2 Basic TDS Tester, 0-999 ppm Measurement Range , 1 ppm Resolution, +/- 3% Readout Accuracy

HM Digital ZT-2 Basic TDS Tester, 0-999 ppm Measurement Range , 1 ppm Resolution, +/- 3% Readout Accuracy
$15.75 $15.99
ZT-2 Basic TDS Tester The ZT-2 is the perfect low cost meter which can be used as a promotional item or give-away with the purchase of another product. This low cost does not sacrifice quality. Auto-off function Large easy to read LCD Factory Calibrated with a 342 ppm NaCl solution
HM Digital TDS-4TM Meter with Digital Thermometer

HM Digital TDS-4TM Meter with Digital Thermometer
$23.99 $24.99
TDS-4TM: Aquarium TDS Meter with Digital Thermometer The TDS-4TM handheld meter is ideal for testing TDS and salt levels of freshwater aquariums and ponds. It can also be used for testing water filtration and purification systems, such as RO and DI, to know when to changes filters and membranes. FEATURES: Pocket size makes it ideal for portabil...
HM Digital ORP-200 Waterproof ORP Meter, -999 to +1000 mV ORP Range, 1 mV Resolution, +/- 0.5% Readout Accuracy

HM Digital ORP-200 Waterproof ORP Meter, -999 to +1000 mV ORP Range, 1 mV Resolution, +/- 0.5% Readout Accuracy
$83.25 $87.95
Measures Oxidation Reduction Potential (Redox) and Temperature Auto-ranging calibration with digital fine tuning Includes storage solution in a sponge embedded in a clear cap Waterproof housing (IP-67 rating) Simultaneous temperature display The ORP Meter measures oxidation reduction potential (Redox) and temperature The ORP-200 meter has an au...

HM Digital TDS-4TM Pocket Size TDS Tester Meter with Digital Thermometer, 0 - 9990 ppm. TDS Range, 1 ppm Resolution, +/- 2% Readout Accuracy
$23.99 $24.99
The TDS-4TM handheld meter is ideal for testing TDS and salt levels of freshwater aquariums and ponds. It can also be used for testing water filtration and purification systems, such as RO and DI, to know when to changes filters and membranes. FEATURES: Pocket size makes it ideal for portability and storage. Hold Function Auto-off Function (Aft...