What is the name of the device attached to shipments to monitor temperatures during transport?

• A. Time-temperature indicator
• B. Thermometer
• C. Data logger
• D. Temperature tag

Answer: (A)

Monitoring temperature exposure during transport relies on a device that travels with the shipment and shows the cumulative effect of time and temperature. The time-temperature indicator is specifically designed to do this: it changes or provides a visible readout that reflects how long the product has been exposed to temperatures outside the safe range, giving an at-a-glance confirmation of whether the shipment stayed in the safe zone.

A thermometer gives a single snapshot of temperature at one moment, not the whole journey. A data logger records temperature over time and needs to be read and analyzed after the trip. A temperature tag might warn about out-of-range conditions but doesn’t provide the integrated history of exposure.