All I wanted to ask though is that you have a significant range of radio’s that transmits digital data, but I am looking for a radio system that is capable of transmitting analog data, for example from analog pins on an arduino.
There might be some way to us analogue RF method such as amplitude modulation (AM), however, this is not reliable or accurate (signals can be affected by so many things).
All low cost and highly available RF modules are digital. It would be best to take analogue samples of the pins, and send the digital value over the air. This could be quickly converted back to analogue on the other side, using an R2R ladder, PWM or best of all, DAC.
Let me know what you end up going with!