Update: Instead of writing new posts when I find a new sensor, I decided to create a page for all Lego Mindstorms Sensors. Go to that page for the most up to date list of sensors.
If you purchased a Mindstorms Set you’re probably familiar with the “standard” Lego Mindstorms NXT sensors: the Ultrasonic Sensor, the color detector, the touch sensors and also the rotation sensors in the motors. But do you know that there are a few companies that create sensors that work with the NXT? I searched and found a good amount of new sensors to play with.
Read more 3rd party sensors for the NXT