The continuous ultrasonic level transmitter is introduced to meet specific level or open channel flow measurement needs of the North American industrial and municipal markets. The ultrasonic transmitter provides a reliable, repeatable and highly accurate (0.15%) continuous level measurement of liquids. It is capable of liquid level measurement to ranges up to 30 ft. (9.1 m), with a 2-wire 4-20mA, HART output signal. The 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°F to 158°F (-40°C 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.