Ultrasonic level transmitter

Ametek Drexelbrook's Usonic-series ultrasonic transmitter provides a reliable, repeatable and accurate (0.15%) continuous level measurement of liquids. The system is capable of liquid level measurement to ranges up to 9.1 m, with a 2-wire, 4-20 mA, HART output signal.

The Usonic sensor is constructed of CPVC for use in environments that are classified hazardous (Class I, Div. 1) with intrinsically safe or explosion proof installation requirements, temperature range from -40 to 70°C and with process pressures up to 50 psig. The system is available with either a 2" NPT or 2" BSP process connection.

The compact electronics comes standard with an integral display and keypad for local configuration and precludes the need for handheld communicators or PC software. Internal software features support over 80 standard flume and weir characterisations with totalisation display in a resettable and a non-resettable format. Custom characterisations for non-standard flow or tank shapes can be set up through a 21-point strapping table.

The Usonic features patented algorithms that allow the system to ignore most internal vessel obstructions that may be positioned directly in the ultrasonic beam path without the need for user intervention. The sensor can also be recessed in vessel nozzles to allow measurement to the very top of the vessel.