Milwaukee Instruments, MW802, PRO 3-in-1 pH, EC, TDS Combo Meter with ATCMW802 Includes Only:MW802 Combo MeterSE-600 preamplified non refillable double junction combination pH electrode with built in EC/TDS probe and temperature sensor; 1m (3.3') cable.pH7.01, 1413 µS/cm & 1382 ppm (for MW801) or 1500 ppm (for MW802) solutions, 20 mL each.Instruction Manual.1 x 9V battery. This Milwaukee 3-in-1 combo meter allows you to measure pH, EC (conductivity) and TDS with a single meter and one single probe.pH and conductivity are critical for growers. pH can effect plant nutrient and water uptake and reduce the efficiency of fertilizer, herbicides and pesticides. Managing conductivity helps growers pinpoint fertilizer and other needs.The Milwaukee MW802 PRO Combo Meter lets you easily and accurately test pH, conductivity and total dissolved solids (TDS) using a single meter and integrated probe.Simple, portable and rugged. No more juggling multiple electrodes and wires. Automatic temperature compensaton included.The MW802 is the ultimate solution for pH and nutrient management.Features: pH, conductivity / nutrient EC, TDS (ppm) with automatic temperature compensation.A replaceable, integrated pH, EC, and TDS (ppm) probe with a single 3 foot cable for easy use (SE600 probe included).A fiber junction on the pH sensor to reduce contamination when measuring fertilizer solutions. A light weight and portable form factor at just 5.8 ounces with battery and just over 3 inches wide.A large easy to read display.Factory calibration with a simple, single point manual calibration for both pH and EC.A reputation for a rugged build and long lifeSpecialized design for hydroponic, aquaponic, and greenhouse growers.