When I say cycle I mean in a period the serial monitor reads out five values. I would like to see far more than 5.
In what period? A week? I'm sure the Arduino is capable of more than 5 readings a week.
If the period is 5 microseconds, you may well be SOL.
voltage = (sensor*5)/1024;// the sensor value divided by the voltage/sensor ratio
Isn't integer math wonderful? It is, but it probably is not what you want. Using 5.0 and 1024.0 will produce results that are closer to what you expect, I'd guess.
I have tried increasing the communication speed but that prints out gibberish
Did you change the speed in the receiver, too?