Hm Digital Com-80S Hydrotester

he COM-80 is an economically priced, reliable EC/TDS meter that is ideal for testing applications such as hydroponics, gardening, and more.

Features: 

• Measures electrical conductivity (EC), total dissolved solids (TDS).  Excellent for hydroponic nutrient testing.
• 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 COM-80 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).
• Dimensions: 15.3 x 3.2 x 1.8 cm (6.0 x 1.3 x 0.7 inches).
• Weight: 53.9 g (1.9 oz).