Bluelab Combo MeterMeasure pH, conductivity and temperature on the go Measures pH, conductivity and temperature on the go Brilliantly simple design thats easy to use, clean and calibrate Backlit display to capture every measurement with ease Includes a pH Probe and Conductivity Probe to cover all your nutrient uptake fundamentals 2 metre cable for measuring in hard to reach locations Customise scales to your preference conductivity in EC, CF, PPM 500 (TDS) or PPM 700;