Bluelab Combo MeterThe Bluelab Combo Meter is a portable all-in-one meter that measures pH, conductivity (EC) and temperature in solution. A 6.5 ft probe cable lets you read the reservoir while the display stays in hand.It is a workhorse for mixing and monitoring nutrient solutions in hydroponic and container systems. Easy push-button calibration keeps readings accurate over time.Available Options Measures pH, conductivity (EC) and temperature 6.5 ft (2 m) probe cable Replaceable double-junction pH probe Includes pH and conductivity probes Key Features Three parameters in one portable meter Successful push-button calibration Automatic temperature compensation Replaceable probes extend meter life Ideal Applications Mixing and monitoring nutrient solutions Hydroponic reservoir management Portable bench and field testing