11.7.9. Equipment used in low-temperature slow pasteurization must ensure(1) continuous agitation of the dairy product so as to maintain uniform temperature;
(2) protection of the dairy product against any source of contamination by means of a lid;
(3) throughout the pasteurization process, thermometer monitoring of the dairy product temperature and the temperature of the air between the dairy product and the lid; and
(4) continuous recording of the dairy product temperature with a thermograph or equivalent device.
The temperature of the air between the dairy product and the lid taken at a distance of between 2.5 cm above the dairy product and 5 to 9 cm below the lid must be at least 3°C higher than the minimum pasteurization temperature.