Ideal Total Dissolved Solids (TDS) tester for all water purification applications, wastewater regulation, aquaculture, hydroponics, and colloidal silver.

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Instruction Manual


Economy model that is ideal for end-users.

MED TDS EZ• 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.

• Display: large and easy-to-read LCD screen.

• Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver.

• Fun, translucent blue housing that's very strong and durable.

• Includes a TDS chart sticker on the back of the meter that explains TDS values.

• Comes in a retail-oriented package.

 Need help deciding which meter is right for you?  View our TDS/EC Meter Selection Guide.


• Range: 0 - 9990 ppm (mg/L)

• Resolution: 0-999: 1 ppm; 1000-9990: 10 ppm (indicated by a 'x10' icon)

• Accuracy: +/- 3%

• EC-to-TDS Conversion Factor: NaCl (avg. 0.5)

• Power source: 2 x 1.5V button cell batteries (included)  (LR44 or equivalent)

• Battery life: Approx. 1000 hours of usage

• Dimensions: 15.5 x 3.1 x 2.3cm (6.1 x 1.25 x 1 inches)

• Meter weight: 56.7g (2 oz)

• Weight with package: 76.5g (2.7 oz)

UPC: 891144000168