The W305 single or dual input panel mount pH/ORP controllers has been designed for reliability, flexibility and ease-of-use, even in challenging industrial environments. The panel mount controllers are said to provide cost and space savings by allowing you the flexibility to add a second sensor rather than a second controller. A simple sensor calibration process saves time and digital inputs for each sensor input channel prevent control based on stagnant samples or empty tanks. Control output limit timers prevent runaway chemical addition. Manual output activation makes it easy to test outputs on installation or make chemical additions safely by hand. Other features demonstrating the controllers' range, flexibility and ease-of-use include an optional calibration reminder, automatic probe wash and automatic buffer recognition.