Temperature measuring and recording device inside sealed product package

摘要

The device has a time and date recording circuit which is started when the device is manufactured. The device is placed inside the package with the product. When the package is placed in storage or loaded aboard a transport container, the temperature sensing and recording mechanism is set in operation by an external signal which passes through the package seal without galvanic contact. When the package is unloaded or taken out of storage, the record of temperatures and times is read out without breaking the seal or galvanic contact.