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Using a wireless motion sensor to shut off power [HELP!]

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mtalia86

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Hello everyone, i have a little project that requires a rather unusual device

Basically i need to have a wireless motion sensor with a 2 hour time delay to shut off the power to a 240v device.

so if the motion sensor doesn't detect any motion for a period of 2 hours it must wirelessly cut the power to the device, then once it detects motion again it would turn it back on.

Would anyone here know how i would go about doing such a thing?

Thank you in advance

Matthew
 

Does it have to be wireless as in radio ?

or did you really mean non-contact ? The infrared motion detectors used in the alarm industry along with a timer unit could be adapted for your use :)

Dave
 
The infrared motion detectors used in the alarm industry along with a timer unit could be adapted for your use.
Click to expand...
A standard PIR light switch will be cheaper. An universal time relay configured as retriggerable off-delay should do.
 
I wanted the sensor to be wirelessly turning off the device, yes as in radio receiver. could you give me a good online store to buy these components?
 

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