流量指示器用于声音报警，灯光报警，当流量发生时启动电机、泵等继电器或起动器开关。
Waterflow indicator used to sound alarm, light signal, actuate relays or starter switches for motors, pumps, etc., when low occurs.
流量开关用于声音报警，灯光报警，当无流量时启动电机、泵等继电器或起动器开关。
Waterflow indicator used to sound alarm, light signal, actuate relays or starter switches for motors, pumps, etc. , when no flow occurs.
流量开关用于声音报警，灯光报警，当无流量时启动电机、泵等继电器或起动器开关。
Flow switch used to sound alarm, light signal, actuate relays or starter switches for motors, pumps, etc., when no flow occurs.
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