Controller assembly for automatic flush valve

A controller assembly for an automatic flush valve, the controller assembly comprising a battery set, a sensor, a base that holds the battery set and the sensor together into a combination, a cap covering the combination from outside, and a solenoid valve as well as a membrane provided below the combination, and the controller assembly being characterized in:

• a foundation, being an integral part including an upper flange, a lower flange, and a grating segment between the two flanges, the foundation having an upward-open socket and a downward projecting pipe, wherein the socket has a bottom communicated with an upper end of the pipe, and the solenoid valve and the membrane are placed in the socket of the foundation successively from top;
• a ring, being rotatably mounted around the lower flange of the foundation;
• and
• a sleeve, passing the cap to be mounted around the foundation and deposited on the ring, and being affixed to the foundation by means of at least one bolt.