The PSL 5.0 pump station level controller from Greyline Instruments has redundant level sensing and includes a noncontacting ultrasonic sensor. The user can connect a loop-powered pressure sensor for redundant sensing in applications with foam or grease. It will continuously recalibrate the pressure sensor and automatically switch back and forth from ultrasonic to the pressure sensor as required. It is designed for sewage lift stations, wet wells and storage tanks. 888/473-9546; www.greyline.com.