The U-GAGE® T30UX is an easy-to-use ultrasonic sensor with extended range and built-in temperature compensation. Simple push button configuration provides flexibility for a variety of applications. Easy-to-see indicator LEDs communicate the status of the sensor. The Green "Power" LED ON indicates that the sensor is in Run Mode (the sensor's normal operating condition). The Red "Signal" LED indicates the target signal strength. The Amber "Output" LED indicates that the output is enabled and the sensor is receiving a signal within the window limits (depending on NO or NC). The Amber "Mode" LED indicates the currently selected mode.