Pleasure Way would know and would likely be happy to help. probably a Manchester tank but call them to confirm.
Does your RV show the propane level inside the coach? If so, there would be wires leading from the gauge.
The other type I know of is a basic snap on.
snap on no remote.jpg
To calibrate when replacing you need to fill the tank then use a magnet on the back of the gauge to rotate the gauge dial needle to Full then install the gauge.