Sensor deals from Amazon.com

Touchless trashcan creates a germ free, odor free, automated environment. Uses patented, invisible, and harmless infrared technology. Lid opens instantly when hand or trash is within six inches of its sensor. Designed to open flawlessly more than 100,000 times.
Price: $59.99 [Notify me when price goes down.]

Wall-mounting temperature sensor and transmitter. Transmits temperature up to 80 feet. Weather-resistant case and wall mounting screws included. Compatible with most La Crosse weather stations.
Price: $11.99 [Notify me when price goes down.]

Sends alert when people, vehicles enter driveway or approach mailbox. Wireless; motion-activated; weather-resistant; 400-foot range. Sensor installs with screw on any surface: door, post, garage. Portable receiver has three settings: high or low chimes and ôoffö.
Price: $11.40 [Notify me when price goes down.]

Energy Series Dance Pad features a striking new design.. Energy Series Dance Pad is fully compatible with PlayStation, PlayStation 2, Xbox consoles, and PC.. Dance Pad?s buttons and sensors are arcade sized.. Energy Series Dance Pad uses Non-slip foam cushion bottom that prevents the pad from moving..
Price: $24.92 [Notify me when price goes down.]

Product Type - Web Camera. Dimensions WxDxH - 6.1" x 3.0" x 8.2". Manufacturer Warranty - 3 Years. Sensor Resolution - 1.3M CMOS.
Price: $9.00 [Notify me when price goes down.]

Buy with confidence!. Day/Night Motion/Audio Sensor Wireless Monitoring Kit.
Price: $26.99 [Notify me when price goes down.]

The pouch that facilitates attaching the Nike + iPod Wireless Sensor to the top of your own running shoes.. Easily attached and removed. Protective neoprene and rubber construction. StrongVelcro closure keeps your investment secure.
Price: $2.99 [Notify me when price goes down.]

Robot packed with over 200 words and phrases, and 200 pre-programmed movements. Operates with remote control, programmable memory, and voice activation. 17 custom designed actuators and gyro-sensor for balance and freely moving joints. Includes remote control, hexagon wrench, action chart, operation manual and 3 AAA batteries.
Price: $184.00 [Notify me when price goes down.]

Includes 1 Touch Sensor. Does not include connector cable. This is the individual component, and does not include the NXT Intelligent Brick, software or any accessories. It requires the complete LEGO® MINDSTORMS® NXT set (#8527) for use.. LEGO® MINDSTORMS® is age graded 10+ and is P/C MAC compatible.
Price: $10.93 [Notify me when price goes down.]

Place the three motion sensor pods to track movement throughout the house. Mark sensor locations on lighted screen with dry erase marker. Handheld base station unit warns you when sensor is tripped with LED indicator lights and spoken alerts. Clips to belt or backpack for the spy on the go.
Price: $19.99 [Notify me when price goes down.]