The MNU ultrasonic level sensor from Automation Products Group communicates via Modbus and can be programmed to fit almost any level application. It can deal with application challenges by altering such settings as pulse strength and sensitivity to incoming signals. It can also ignore obstacles, qualify echoes and deal with environmental variables. The housing is a durable polycarbonate with a PVDF sensor face. Inside the housing, the electronics are fully sealed in industrial potting for vibration resistance. Options include sensing ranges from 4 inches to 40 feet and corresponding 1-, 2-, and 3-inch NPT fittings. 888/525-7300; www.apgsensors.com.