|LEGO → TECHNIC → Mindstorms|
|NXT Touch Sensor|
9843 NXT Touch Sensor is a Mindstorms set that released in 2006. It contains a Touch Sensor accessory for the Mindstorms NXT(This same sensor also came with the successor to the NXT. The 31313 Mindstorms EV3. The touch sensor reacts to having its button pushed in, or having it released.