URM06 sensors and RF project

So here's the thing. I want to purchase several URM06 ultrasonic sensors and attach them to separate microcontrollers. I want the transmitter to constantly send ping and the receiver to just listen to that ping so that I could measure the distance between them. Essentially one URM06 sensor behaving as transmitter only and one as receiver only. I then plan to use an RF to send another signal to say a pulse is on its way, then time how long the sound takes to arrive after that.

My main question is if this would be possible with a URM06, if it's possible to have one as transmitter only and one as receiver only.?