How far can the signals travel?
This isn't a sensor, it's a component. It outputs a 3.3V pulse which lasts several seconds after last detection. The pulse is intended to drive a logic circuit, microcontroller etc. There's no spec of the output current capability. It can be less than 1mA. In theory the pulse can be filtered in the receiving end with a lowpass filter which has BW less than 1Hz. I guess with it the pulse stays detectable with a comparator in cables which are hundreds of meters long.

The max 3m detection range isn't much for large area surveillance. You need numerous sensors. To keep cables simple you very likely want to use some kind of daisy chaining. Ideally one 2...4 wire cable should feed and read as many detectors as wanted, the signal and power lines would be ideally the same and every detector should still be identifiable when an alarm occurs. Designing robust enough system for this is a challenge. Another challenge is the weather. Lightning creates easily high, say 2000V  surges without a need of straight hits. Water as rain, as condenced and as ice must be kept out in every situation.

A substantial amount of tests and design is needed. The given data says that human motion can be detected at 3m. But how are you going to handle swinging plants, sunshine  and moving shadows? I guess your actual problems are totally different than "could the 3.3V output be detected".