HM Digital TDS-3 Total Dissolved Solids Handheld Meter with Carrying Case

Price $24.95
Availability: In Stock
The TDS Handheld Meter is ideal for commercial use. This Handheld Meter is useful for all water purification applications, waste water regulation, aquaculture, hydroponics, and colloidal silver. The TDS-3 includes a carrying case with belt clip. The TDS-3 Handheld Meter is 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 off automatically after 10 minutes of non-use to conserve batteries. Measurement Range: 0-9990 ppm. From 0-999 ppm, the resolution is in increments of 1ppm. From 1000 to 9990 ppm, the resolution is in increments of 10ppm, indicated by a blinking 'x10' image. The TDS-3 Handheld Meter has a built-in digital thermometer. Display: Large and easy-to-read LCD screen. Factory Calibrated: The TDS-3 calibrated with a 342 ppm NaCl solution, and it can be recalibrated with a mini-screwdriver.
Package Qty 1
Used In Brands HM Digital
Manufacturer's Id TDS-3
UPC 799705707313
Actual Size (in) 6 1/10 inches (height) x 1 1/4 inches (width) x 1 inch (depth)
Actual Size (cm) 15.494 x 3.175 x 2.54
Operating Temperature (°F) 32 - 176
Operating Temperature (°C) 0 - 80
Power Requirements 2 x 1.5V Button Cell Batteries (357A--included), Battery Life: 1,000 Hour Of Usage

Reduced Contaminants

The HM-DIGITAL-TDS-3 is comparable with the following part numbers


User Guide


  1. Remove the protective cap. Turn the TDS meter on. The ON/OFF switch is located on the panel
  2. Immerse the meter into the water/solution up to the maximum immersion level (2 inches). Lightly stir the meter to dislodge any air bubbles. Wait until the display stabilizes
  3. Once the reading stabilizes (approx. 10 seconds), press the HOLD button to view the reading out of the water
  4. If the meter displays a flashing
  5. After usage, shake off any excess water from your meter. Replace the cap
  6. Once the meter is on, the temperature function can be used at any time, in or out of liquid. Press the TEMP button. The display will switch to temperature (in Celsius only). To return to TDS mode, press the TEMP button
  7. Remove the battery compartment. Install new batteries (model 357A or L1154)
  8. Be sure that the batteries are properly aligned. Replace the battery compartment
  9. The meter will turn on automatically

Reset Instructions