A and B double tanks are used for coating resin

a tank supplies material directly to the mold of the production line

and B tank is the replenishment tank. When the material level of tank a reaches the lower limit

the low level sensor of tank a sends out a prompt signal

and tank B starts to work to replenish material to tank a until the upper limit of material level of tank a is reached

the high level sensor of tank a sends out a prompt signal

and the replenishment of tank B to tank a ends. In this process

tank a continues to work and the production is normal. When the material level of tank B reaches the lower limit

the low liquid level sensor of tank B will also send out a prompt signal

and at the same time

it will trigger an audible and visual alarm to remind manual replenishment of coating resin of tank B. During the operation of tank B

the normal operation of tank a will not be affected

so the production will be carried out normally and the production efficiency will be greatly improved.