The Combo Meter from Bluelab is a premium 3-in-1 handheld meter designed for growers who need fast and reliable readings of the three key elements that influence plant health: pH, conductivity (EC), and temperature. Built on over 25 years of trusted performance, this portable, battery-powered device lets you take accurate measurements in nutrient reservoirs, run-off, and water supplies wherever you grow. Just like the Conductivity Pen and Pulse Multimedia EC/MC Meter, the Combo Meter from Bluelab features a backlit display and intuitive buttons that make it easy to navigate between parameters, while the replaceable double-junction pH probe and factory-calibrated conductivity sensor ensure long-term precision. With robust construction and long-cable probes for hard-to-reach locations, it is a complete tool for maintaining optimal growing conditions.