Pir sensor 2 way

[piz]

Good Evening all
I have been asked to replace 1 pir sensor but am confused
1 sensor is on the gate and the other is on the house about 15 meters apart, the sensor has 1 blue going to net 1 brown to live and 1 red goes to L' is this switch live
The earth cable from the switch has been used for a switch live got crown sleving on it surley this aint right??
when I call techincal they say I need a sensor that is compatible with 2 sensors is there such a thing?
also when the switch is on it is on sensor when it is switched to the off position it overrides and stays on how and why
any one please give me a wiring guide would be great cheers

 

[ICE]

at the sensor you should have live and neutral feeding the sensor and the switch live (G/Y sleeved brown) feeding back to possibly a contactor.

can you be any more clear.

 

[piz]

Hello Yeah Green & Yellow is the switched live so brown to perm live blue to neut and Green & yellow with brown sleeving going to Load is this correct