Abstract: A thermal sensor (20) located in the centre of a food simulant composition (24) linked to a remote measuring indicating and/or regulating device (28). The temperature of the food simulant changes in the same way as food stored in its vicinity and is unaffected by the movement of the ambient air which varies in temperature dramatically. This allows an actual reading and recording of stored food temperature and the regulation of the temperature within a refrigerated space by a thermostat (16). Its uses are mainly for frozen, chilled and refrigerated food, and the reading of temperature of food cooked for example in micro-wave ovens.

Abstract: Method and apparatus for treatment of air conditioning systems and the like provides an air treatment element (18) comprising a microbial control medium and an entrainment medium therefor. The air treatment element (18) is adapted to be placed on the upstream side of the air cooling element (14) of an air conditioning system so that the air stream (16) thereto has entrained therein droplets of entrainment medium (32) containing the microbial treatment medium which are then condensed on the cooling surfaces, thereby removed from the air stream (16) and effectively applied to all relevant surfaces for exerting an effective microbial control action.