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.
这种气动继电器输出提供了压力，表示输入信号压力加上预设的偏见高输出流量。
This pneumatic relay provides high output flow at an output pressure that represents the input signal pressure plus a preset bias.
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