this sensor has a simple pulsed output that can be used with any microcontroller.
Yes, this could be used with Radmon/Radlog. I'm not sure if you could feed the pulse output directly into an audio input on a PC or whether it would need some simple electronics to lower the level suitable for the PC audio input. I suspect the latter as the pulses are probably around 5v and the audio input is about 1v. It could also be connected to a microprocessor such as an arduino or RPi and then the readings sent to Radmon directly or via a PC.