Temperature Measurement

Air, brine, smokehouse, surface and geometric-centre temperatures answer different questions. The monitoring point must match the hazard or process decision.

Liquid-in-glass, resistance sensors, thermistors, thermocouples and infrared devices differ in range, response, accuracy and contact requirements. Selection should fit the application.

A probe must reach the intended location without measuring a void, bone or surface. Thick products and changing chamber conditions require enough time for the sensor to stabilise.

Infrared instruments estimate surface temperature and depend on emissivity, field of view and line of sight. They do not directly measure the centre of a ham or sausage.

Routine checks, reference comparisons and calibration records establish confidence. Identification and due date prevent an out-of-status instrument from silently supporting release.

Specify instrument, location, method, frequency, acceptance range and response to failure. Retain readings with the batch and investigate implausible values rather than averaging them away.