Patent ID: 7222527

Claim:
A water circuit assembly with an automatic water level sensing device used in a massage tub; the assembly comprising: a water circuit device having a plurality of suction openings, one water outlet and a motor, wherein the suction openings and the water outlet are arranged at the same side and the water outlet is at a middle section of the side; and the motor is arranged at another side opposite to the side having the suction openings and water outlet; a first sensor head installed at an inner side of the water circulation device; a second sensor head installed at an inner side of the water circulation device, a sensor element and a CPU control element; wherein the first sensor head and second sensor head are connected to the sensor element; the second sensor head is connected to the CPU control element; and the CPU control element is connected to the motor and a switch; and wherein the sensor element serves to detect a resistance between the first sensor head and second sensor head for acquiring a level of water in the massage tub; when the water level is higher than elevations of the first sensor head and second sensor head, the CPU control element actuates the motor to operate according to the setting of the switch; if the water level is lower than one of the elevations of the first sensor head and second sensor head, the CPU control element will cause the motor to stop.