EchoSonic Digital Infinity intelligence general purpose two-wire ultrasonic transmitter provides non-contact liquid level measurement up to 26ft or 8m, with proportional 4-20mA output. Calibration is done by target recognition against a reflective surface and LED status indicator. It is PC configured via Flowline's free WebCal software and is now offered in a NEMA 4X enclosure with conduit interface as well the original Type 6P with cable interface.