Quintus Systems has developed a special terminal to speed up cashless payment for school meals. The Single Price terminal is programmed to the price of the school set meal. The small box works in unattended mode with the pupils simply touching their finger or card on the reader to be charged the standard price. The terminal gives off a loud positive or negative sound to confirm payment, or non-payment. A nearby till operator can continue to operate their till whilst monitoring the sounds from the Single Price terminal. In the case of a non-payment, they can take appropriate action.
2 Single Price Terminals set up on a plinth ready for meal service.
https://www.quintus.co.uk/products/cashless-payment/spec-sheets/