The invention discloses a self-cleaning
evaporation sensor. The self-cleaning
evaporation sensor comprises an
evaporation barrel, a controller, a
water level gauge, a
rain gauge and a positive-and-negative-rotating water pump, wherein a stand
pipe is arranged in the evaporation
barrel, a self-rotating spraying head is arranged at the top of the stand
pipe, the
water level gauge is connected with the evaporation
barrel through a communication
pipe, the communication pipe is connected into the evaporation barrel, the stand pipe is connected with the positive-and-negative-rotating water pump, a three-way electric
ball valve is connected to the upper end of the positive-and-negative-rotating water pump, the controller is connected with the
water level gauge, the
rain gauge, the positive-and-negative-rotating water pump and the three-way electric
ball valve, a magnetic float is arranged in the communication pipe, a water feeding pipe and a water draining pipe are also connected on the three-way electric
ball valve, an overflowing hole is formed in the upper portion of the evaporation barrel, and a
hydrosphere is arranged on the periphery of the evaporation barrel at the overflowing hole; the invention also discloses a specific control method of the self-cleaning evaporation sensor. Automatic cleaning, automatic water supplementing and automatic water draining functions can be achieved, and the self-cleaning evaporation sensor has the advantages of being high in automatic degree, stable and reliable in running and high in measurement accuracy.