A system for receiving cash deposits at a point of sale includes a processor; a product inventory database; a communication interface; a product inventory item reader; and a purchase instrument reader. A vehicle includes a body, a first control surface rotatably mounted to the body, and a restraint attached to the first control surface for restraining the first control surface in a stowed configuration. The immediate andor controlled release beads may be used to form tablets or capsules. Additionally, the detector may include one or more warning devices such as an ionization or photoelectric sensor, speaker, or light source. The sleeve has an opening extending therethrough. The time period tf during which the pressurised gas was flowed into the passage is determined and then the length Ld is determined by reference to the time period tf.