These self-contained Ultrasonic Level Sensors provide level control of both liquid and bulk materials. This gives the user a viable alternative to bubblers, floats, capacitance probes, and pressure transmitters. With sensing ranges of 30 and 40 feet respectively many tanks are within reach. The incorporation of a microprocessor design makes it possible to achieve signal conditioning. This gives the ultrasonic sensor the ability to process the return ultrasonic echo and distinguish between false targets and real targets. With the incorporation of a microprocessor into the design of the RPS-3000PVC and RPS-4000 ultrasonic level sensors, many of the common problems facing long range sensing applications have been overcome. Software was then written to optimize the performance characteristics of the sensors. The artificial intelligence analyzes and conditions the return ultrasonic echo. This process filters out any false echoes and electrical noise. An additional task that the microprocessor does is temperature compensation.