So you need a tool to find hidden electronic devices such as spy cameras? The Thermal Camera Detector (TCD-1) may help. Simply point it to the place you think a camera may be hidden, and the rest is easy. The device lets you know where inspection is needed.
The TCD-1 has a laser beam that changes from green to red when something suspicious is detected. Be sure to turn off all your electronic equipment before trying this. More info is available here.