warehouse aisle sensors

[dragonspark]

hello to all
happy new year to all, i have been asked by a client to fit sensors in the aisles of their warehouse, all they want is simple on when detection and off when no people or frork trucks etc , switching sections of an aisle as motion is detected, the loading is very low as existing flourescant lights have been converted to accomodate led strip lights/tubes, so loading is very low and in some areas the sensors will be controlling contactors, the aisles on average are about 5 metres wide and sensors will be mounted at a height of 5.3 metres from floor.
Does anyone know of appropriate sensors to do the job, i have asked for quotes which not only seem excessive but also not sure if they will do the job being regular sensors, so, help anyone please.
many thanks

 

[telectrix]

infra red send/receive.the operate on 12V so you'll need a PSU (or a few) and some creative contactor/relay configurations. check the range of detectors before selection.

 

[The Ghost]

A decent sensor could be a CP product, how long are the aisles? Mind you they are about £100 plus each! Or around £60 for the other one I am thinking of.

 

[dragonspark]

Hello
Many thanks for your replies, deeply appreciated.
In response i had already installed multicore cables throughout some of the aisles, which can be easily repositioned but at present i have allowed ten metres between sensors, i had also already envisaged that contactors/relays would by utilised because of the way the existing wiring is installed.
Would you be so good to advise me of manufacturers and models please.
Many Thanks