This is the Magnetic Door Switch Set, a small reed switch assembly specifically designed to alert you when doors, drawers, or any other aperture opens.

This Load Sensor, sometimes called a strain gauge, is the same one found in digital bathroom scales. This sensor can measure up to about 110 pounds. 

Are you trying to make a quick dime from electronics? Why limit yourself to dimes? This coin acceptor will take three different kinds of coin! Whether you&rsquore building your own arcade cabinet or just charging admission to your house, this programmable coin acceptor makes it easy to monetize your next project.

Whether you&rsquore an agriculturalist, a professional meteorologist or a weather hobbyist, building your own weather station can be a really rewarding project. When you&rsquore measuring weather, however, you need some pretty specialized sensors. This kit represents the three core components of weather measurement: wind speed, wind direction and rainfall.

Want to start playing with sensors, but don&rsquot know where to begin? This kit includes a variety of basic sensors for any beginner or experienced programmer. With everything included in this kit, you&rsquoll be able to sense acceleration, force, vibration, Infrared light, ambient light, temperature, and more!

The Line Follower Sensor is an add-on for your RedBot that gives your robot the ability to detect lines or nearby objects.