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HM Digital Meters

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HM Digital 1000 PPM Calibration Solution
For optimal performance, re-calibrate your meters periodically or if testing TDS or conductivity levels in wide or different ranges. NaCl calibration solution. Comes in lightweight HDPE plastic bottles. Sealed with a coated foam liner...
$6.50
HM Digital Aquapro TDS Water Tester
Measures total dissolved solids (TDS) and temperature. Automatic Temperature Compensation (ATC). Water-resistant housing with digital calibration (push button). Measurement Range: 0-5000 ppm. Auto-off function, data-hold function and low-battery indi..
$42.95
HM Digital Handheld TDS-3 Tester
Ideal for commercial use. Includes a carrying case with belt clip. Highly efficient and accurate due to its advanced microprocessor technology. Hold Function: saves measurements for convenient reading and recording. Auto-off function: the meter shuts..
$36.95
HM Digital In-Line Dual TDS Monitor
Displays TDS levels of the feed water and product water with in and out electrode probes. Highly efficient and accurate due to its advanced microprocessor technology. Auto-Off function conserves battery power. The unit shuts off automatically after 1..
$41.95
HM Digital pH 80 Meter
Resolution: pH 0.1 pH, 0.00 - 14.0 pH. Accurate to ..
$62.95
HM Digital pH Electrode Storage Solution
For use with HM Digital's PH-200 and PH-80 (as well as other brands of pH meters). Always make sure your sensor is kept in an electrode storage solution. If dry, refill the pH meter cap with the PH-STOR storage solution. The sponge should be moist (n..
$7.95
HM Digital Replacement Probe for pH
Measures pH and Temperature. Auto-ranging three point calibration with digital fine tuning. pH buffer 4 solution is in a sponge embedded in a clear cap. Measurement Range: 0-14 pH with a waterproof housing. Digital automatic calibration (one point), ..
$41.95
HM Digital Water Resistant Ec/TDS Meter w/  Temperature in C/F Hydrotester (Model COM-80)
The COM-80 is an economically priced, reliable EC/TDS meter that is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more. Measures electrical conductivity (EC), ..
$47.95
HM Digital Waterproof pH Meter
Measures pH and Temperature. Auto-ranging three point calibration with digital fine tuning. pH buffer 4 solution is in a sponge embedded in a clear cap. Measurement Range: 0-14 pH with a waterproof housing. Digital automatic calibration (one point), ..
$99.95
HM Waterproof EC/TDS/Temp Combo Meter
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 temperat..
$76.95
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