Model Number: COM-80 Brand Name: TLead Key Specifications/Special Features: Measures electrical conductivity (EC), total dissolved solids (TDS)Excellent for nutrient testingFour scales: EC: S, mS; TDS: ppm, pptAutomatic Temperature Compensation (ATC)Water-resistant

Measurement range: 0-9990 S; 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: COM-80 meter is calibrated with a 1413 S solution

The meter can be recalibrated with digital calibration using the push buttons

Includes a protective cap and batteries

EC range: 0 - 9990 S; 0 - 9.9 mS

TDS range: 0 - 5,000 ppm (mg/L); 0 - 5.0 ppt

Temperature range: 1-80 °C; 33-176 °F

Resolution: 1 S/ppm; 0.1 mS/ppt

Temperature 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: 53.9g (1.9oz)