Description: Designed for hydroponics, horticulture, and agriculture applications, the Milwaukee EC40 EC/TDS Nutrient Stick helps to make sure that your vegetables and plants are receiving the right amount of nutrient to promote healthy growth. Keeping EC/TDS in your target range helps to achieve better results. Design Features: Measures conductivity (EC) and total dissolved solids (TDS) with automatic temperature compensation (ATC)Ideal ranges for hydroponicsUnits directly in mS/cm/CF/ppm (no conversions required)Factory calibrated: no continuous calibration requiredHigh accuracyAuto on/off featureBlue LED displayGraphite electrode in ABC + PC body.Battery level indicatorsBattery life up to 3 years at approx. 10 measurements per day3 x 1.5V AA (batteries included) Range: 0.2 to 4 mS/cm | 2 to 40 CF | 140 to 2800 ppm 0.7 scale | 100 to 2000 ppm 0.5 scale Resolution: 0.1 mS/cm | 1 CF | 70 ppm (factor: 700 ppm = 1 mS/cm | 50 ppm (factor: 500 ppm = 1 mS/cm) Accuracy: EC: ±4% of reading | ± 1 resolution point Temperature Compensation: Automatic 5 to 50°C / 41 to 122°F
