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HM Digital

  • HM Digital 1.5V Button Cell Battery
    Replacement battery for HM Digital TDS-3, TDS-4, TDS-4TM, TM-1, COM-100, & DM-1 meters
    Regular Price: $2.00
    Sale Price: $1.00
  • HM Digital 3V Button Cell Battery
    Replacement battery for HM Digital AP-1 & AP-2 meters
    Regular Price: $2.00
    Sale Price: $1.25
  • HM Digital TDS 342 ppm NaCl Calibration Solution - 3oz(89ml)
    For optimal performance, re-calibrate your meters periodically or if testing TDS or conductivity levels in wide or different ranges.
    Regular Price: $8.00
    Sale Price: $4.95
  • HM Digital TDS 1000 ppm NaCl Calibration Solution - 3oz(89ml)
    For optimal performance, re-calibrate your meters periodically or if testing TDS or conductivity levels in wide or different ranges.
    Regular Price: $8.00
    Sale Price: $4.95
  • HM Digital Storage Solution

    For use with HM Digital's PH-200 and ORP-200. Always make sure your sensor is kept in an electrode storage solution. If dry, refill the cap with the OP-STOR storage solution.

    Regular Price: $10.00
    Sale Price: $6.00
  • HM Digital pH Buffer Solution Variety Pack
    HM Digital's pH buffer solution comes in powder form, so it's lightweight, takes up very little space, is inexpensive and has an indefinite shelf life.
    Regular Price: $17.00
    Sale Price: $9.95
  • HM Digital ORP Buffer Solution & Electrode Test Kit
    HM Digital's pH buffer solution comes in powder form, so it's lightweight, takes up very little space, is inexpensive and has an indefinite shelf life.
    Regular Price: $27.00
    Sale Price: $15.95
  • EC-3 HM Digital Conductivity Meter With Carrying Case
    Ideal for all water purification applications, waste water regulation, aquaculture, hydroponics, and colloidal silver. Perfect for both consumer or commercial use. Carry one in your pocket or toolbox at all times!
    Regular Price: $30.00
    Sale Price: $18.00
  • Magnetic TDS Pro Meter
    Professional Grade Precision TDS Meter With Magnetic Back meter with a sleek design that's perfect for today's modern kitchen
    Regular Price: $50.00
    Sale Price: $29.95
  • HM Digital DM-1 TDS Monitor with Inlet / Outlet

    The HM Digital DM-1 Digital TDS Monitor is The Perfect Way To Monitor the Quality of Your RO Water

    Regular Price: $67.00
    Sale Price: $39.95
  • COM-100 HM Digital EC TDS & Temperature Waterproof Meter
    Ideal for all water quality testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment and more.
    Regular Price: $100.00
    Sale Price: $59.95
  • HM Digital Commercial In-Line Dual TDS Monitor with Tee Fittings | DM-2
    Install on industrial systems such as car washes, window washing, manufacturing, and food processing.
    Regular Price: $100.00
    Sale Price: $59.95
  • HM Digital Commercial In-Line Dual EC Monitor with Tee Fittings | DM-2EC

    Inline conductivity meter that can be used on commercial water treatment systems such as car washes, window washing, manufacturing, and food processing.

    Regular Price: $100.00
    Sale Price: $59.95
  • PH-200 HM Digital Professional Grade Handheld pH Meter
    Ideal for all pH testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment, wine, coffee, agriculture and more.
    Regular Price: $133.00
    Sale Price: $79.95
  • ORP-200 HM Digital Professional Grade ORP Handheld Meter
    Ideal for all ORP testing, including anti-oxidant measurement, water purification applications, ionizers, agriculture, aquariums & aquaculture, chlorine monitoring, cooling tower disinfection, environmental testing, fruit & vegetable washing, hydroponics, metal finishing, ozone system monitoring, pharmaceutical & medical applications, pools & spas, pulp bleaching, vineyards & wineries and water treatment.
    Regular Price: $147.00
    Sale Price: $87.95
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Our price is lower than the manufacturer's "minimum advertised price." As a result, we cannot show you the price in catalog or the product page.

You have no obligation to purchase the product once you know the price. You can simply remove the item from your cart.