Advantage Controls EchoPod Drum Level Sensors Advantage Controls $412.00 - $615.00 Application: The general purpose ultrasonic sensor provides non-contacting level measurement up to 49" (124 cm) or 9.8" (3 m) with a 4-20mA output. The two-wire 4-20mA output requires a 24 VDC loop power supply and will work for signal distances up to... Choose Options