First, the performance indicators:

1, the operating frequency range :431-478MHz ,220-240MHz
2 , control the distance
L type : open land 10,000 m distance control
H type : open ground 3000 meters distance control
M Type : Control open ground 500 meters away
Longer distances can be customized .
3 , the supply voltage : 220V AC
4 , the transmitter inputs : two -way switch .
5, the receiver output : 2 relay outputs , each 5A/250V
6 , multiple security : Watchdog , each remote device are set to never repeat the address code passwords and frequency , CRC checksum , etc.
7 , ambient temperature :-100C-400C
8 , relative humidity <90% , to avoid strong corrosive gases.

Second, the use

1 , instructions for use
The transmitter is mounted to the side tanks , with two level switch on the transmitter , an upper limit switch ( water pump to automatically stop after stop ) , a lower limit switch ( limit after the pump starts automatically ) , limit switch use normally open points within the water reservoir to the limit switch is closed, the pump stops issuing commands , limit switch is also used normally closed , underwater reservoir falls within the limit switch contact is closed after issuing the command to start the pump .

The receiver is mounted to the vicinity of the pump , the transmitter receives a command issued by two relays (5A/220V) output corresponding to the command level corresponding to the switch K1 , and the transmitter relays the lower limit for starting the pump , the relay K2 and emission machine corresponds to the upper limit of the level switch is used to stop the pump. Need to install the contactor control pumps. See reference wiring diagram ) . The program can also be customized according to user -specific requirements.