The flow switch is an electrical device composed of a flow rate sensor and a switching element that changes the output signal when the medium flow rate reaches a set value. The flow rate sensor is used to detect the flow rate of the medium, the flow rate can be determined by the flow rate and the pipe diameter, and the switching element is used to switch the current of the circuit.
The terminal water test device is installed at the end of the system pipe network or the partition pipe network to check the functions of system startup, alarm and linkage. The end water test device of the sprinkler system is an important part of the spray system. Applicable to wet, dry, pre-acting, circulating, closed foam sprays, the most unfavourable access to the location of the rain detection system transmission pipeline network