The device operated on tiny power cells and had a built-in antenna. Its transmitter would relay data from the device by means of coded pulses.
该装置依靠微型电池驱动，设有内置天线，它的发射器可以利用各种编码脉冲进行数据中转。
2
A float operated switch in the relay is used to initiate an alarm signal.
继电器内的浮控开关发动报警信号。
3
Compared with conventional electric relay control system, PLC control can run more safely and reliably, and can be operated more practicality, simply and conveniently.