(1) In a mechanically refrigerated or hot food storage unit, the sensor of a temperature measuring device must be located to measure the air temperature or a simulated product temperature in the warmest part of a mechanically refrigerated unit and in the coolest part of a hot food storage unit.

(2) Except as specified in subsection (3) of this section, cold or hot holding equipment used for time/temperature control for safety food must be designed to include and must be equipped with at least one integral or permanently affixed temperature measuring device that is located to allow easy viewing of the device's temperature display.

(3) Subsection (2) of this section does not apply to equipment for which the placement of a temperature measuring device is not a practical means for measuring the ambient air surrounding the food because of the design, type, and use of the equipment, such as calrod units, heat lamps, cold plates, bainmaries, steam tables, insulated food transport containers, and salad bars.

(4) temperature measuring devices must be designed to be easily readable.

(5) food temperature measuring devices and water temperature measuring devices on warewashing machines must have a numerical scale, printed record, or digital readout in increments no greater than 2°F or 1°C in the intended range of use.