This tilt switch can easily be used to detect orientation. Inside is a ball that makes contact with the pins when the case is upright. Tilt the case horizontally and the balls don’t touch, thus not making a connection.

A tilt switch / vibration sensor is used in detecting very minor to major disturbances in the object to which this device is connected to such as a door or piece or machinery. Great for monitoring the closing or a door or hinge, or for detecting knocking, pounding, or walking on an otherwise firmly planted surface.