433mhz transmitter

Hi, guys!
I'm newbie with arduino and have some question:

I need to send HIGH state of the pin (magnetic switch (hercon)) on reciever. When it is HIGH(switch) transmitter must send only high signal to reciever that could be readen without arduino.
Who can show me the exemple of the transmitter code?

you are not supposed to do that with 433mhz

I need to send it wireless. Which module I need to use?