The TDS-1 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), total dissolved solids (TDS). Excellent for hydroponic nutrient testing.

Features
Four scales: EC: µS, mS; TDS: ppm, ppt
Automatic Temperature Compensation (ATC)
Water resistant
Measurement Range: 0-9990 µS; 0-5000 ppm; 0-9.9 mS; 0-5.0 ppt
Digital Calibration (push button) to any point within the meter's range
Auto-off function, data-hold function and low-battery indicator
Display: large and easy-to-read LCD screen includes simultaneous temperature reading
Factory Calibrated: The TDS-1 meter is calibrated with a 1413 µS solution—can be recalibrated with digital calibration using the push buttons
Includes a protective cap and batteries
Specifications
EC Range: 0-9990 µS; 0-9.9 mS
TDS Range: 0-5000 ppm (mg/L); 0-5.0 ppt
Temperature Range: 1-80°C/33-176°F
Resolution: 1 µS/ppm; 0.1 mS/ppt Temp. resolution: 0.1°C/F
Accuracy: +/- 2%
EC-to-TDS Conversion Factor: NaCl (avg of 0.5)
Calibration: Digital calibration by push button
Probe: Fixed
Housing: Water resistant
Power source: 3 x 1.5V button cell batteries (included) (model LR44 or equivalent)
1 Year warranty