An MCU-based system is designed to accurately measure and regulate the hydraulic pumping unit's output. The device AT89C2051 is a modern vibratory ultrasonic transmitter and receiver with LED indicator circuit for monitoring of pumping unit states. The essence of a compensator is using a one-line optical temperature sensor to test errors induced by the difference in the ambience of the room. The program for the machine is written in C, interrupting usage of patterns to capture and to monitor the time data for proper oil level calculation. This is worth expanding, because this has the benefit of operating consistently and genuinely calculating during debugging.

Keywords : Ultrasonic detection; oil level; Control System. Microcontroller.