Patent ID: 11885572
Assignee: UNISON ENGINEERING SERVICES LIMITED
Field: Food chemistry (Chemistry)
Classification: CPC F  A  G | IPC A  F  G

Claim 9:
10. The heat exchanger apparatus as claimed in claim 1, wherein the apparatus includes a holding tube in the product line between said heating and cooling stages; and wherein the apparatus includes a temperature sensor at an inlet of said holding tube, and a temperature sensor at an outlet of said holding tube, and the controller is configured to perform a holding tube dwell time test by monitoring a time duration taken for a set temperature increase detected at the inlet sensor to be detected at the outlet temperature sensor, as an indication of dwell or holding time in the holding tube; and wherein the controller is configured to synchronize said temperature sensors so that they are both reading the exact same temperature or the difference between them is stabilized and constant, and wherein a valve and a heater are controlled to increase temperature in the product line, the inlet temperature sensor is monitored to detect a set rise and a clock is activated to determine time duration until the same temperature rise occurs at the end of the holding tube.