Sensor apparatus, other than for medical use; infrared sensors; wireless routers; passive infrared sensors; wireless communication instruments; wireless communication apparatus; wireless transmitters; wireless receiving apparatus; wireless transmission apparatus; heat sensors; remote monitoring apparatus; monitoring units, electric; data collectors; data processors; infrared detectors; passive infrared detectors; data processing programmes for simulating behaviour; movement sensors; apparatus for sensing movement; detectors; intruder detectors (other than for vehicles); motion detectors; intruder detecting sensors (other than anti-theft apparatus for vehicles); intruder detecting instruments