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HM Digital Established in 1987, HM Digital, Inc. (formerly known as Heemang Manufacturing) is an original equipment manufacturer (OEM) that has been recognized worldwide for providing the best values in water testing instrumentation, especially the increasingly popular TDS meter.

HM Digital
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D -Calibration fluid 1000 PPM NOW ONLY $9.90!!!

D -Calibration fluid 1000 PPM NOW ONLY $9.90!!!
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1000 PPM Nacl Cal solution for TDS meters

Market price: $12.99
Our price: $9.90 (€ 8.61), You Save 24%
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E -Calibration fluid 342 PPM NOW ONLY $9.90!!!

E -Calibration fluid 342 PPM NOW ONLY $9.90!!!
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For optimal performance, re-calibrate your meters
periodically or if testing TDS or conductivity levels in wide or different
ranges.

Market price: $12.99
Our price: $9.90 (€ 8.61), You Save 24%
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TDS-EZ Water Quality Tester

TDS-EZ Water Quality Tester
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Ideal for all basic water testing applications. The best value meter in the world!

Market price: $24.99
Our price: $19.99 (€ 17.39), You Save 20%
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B -The TDS 3 TDS meter

B -The TDS 3 TDS meter
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The TDS 3 TDS meter by HM Digital!

Our price: $24.95 (€ 21.71)
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A -Dual Inline TDS meter

A -Dual Inline TDS meter
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The HM Digital dual inline TDS meter is the perfect addition to your water treatment system. Reads two zones at the same time!

Our price: $26.95 (€ 23.45)
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C -Com-100 EC/TDS meter

C -Com-100 EC/TDS meter
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Measures electrical conductivity (EC), total dissolved solids (TDS) and temperature.
Three different calibration options (KCl, 442TM, NaCl), each with its own non-linear conversion factor.
Automatic Temperature Compensation (ATC) using three temperature coefficients


Our price: $54.95 (€ 47.81)
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DM-2 Commercial Inline TDS monitor

DM-2 Commercial Inline TDS monitor
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Designed for commercial/industrial applications. Stronger, water-resistant casing. Calibration can be done individually or simultaneously on each line.

Our price: $59.95 (€ 52.16)
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