Wireless data logger configured to monitor at least one environmental parameter of a shipment including the temperature of the shipment, and a method of operating the wireless data logger

A system configured to monitor at least one environmental parameter of a shipment including temperature of the shipment at least during transport from an origin location to a destination location using multiple of wireless data loggers, each of the wireless data loggers comprising:

• a power source for powering the wireless data logger,
• a first temperature sensor configured for regularly measuring first temperature of the shipment,
• a second temperature sensor configured for regularly measuring second temperature of the shipment,
• a processor,
• a memory configured to store measured temperature data from the first and the second temperature sensors,
• a communication module configured to transmit the at least one environmental parameter including the stored measured temperature data of the shipment to an external data processing device, where the communication module is operated by the processor, where operating includes turning-on the communication module when it transmits at least some of the measurement data including the temperature to the external data processing device, and turning-off the communication module when it is not transmitting measurement data, and
• a housing,
• wherein the power source, the first temperature sensor, the processor, the memory and the communication module are arranged in the housing,
• wherein the second temperature sensor is arranged in the vicinity and adjacent to an outer side of the housing,
• wherein the system further comprises:
• an external data processing device configured to:
• receive measurement data from the first and the second temperature sensors transmitted by the communication module,
• compare the measurement data from the first temperature sensor with the measurement data from the second temperature sensor, where in case the comparison results in a deviation exceeding a pre-defined limit,
• issue a re-calibration request command for the wireless data logger
• wherein the processor is further configured to instruct the first temperature sensor to measure the environmental related parameter while the communication module is turned-off.

A method of operating a wireless data logger configured to monitor at least one environmental parameter of a shipment at least during transport of the shipment from an origin location to destination location, comprising:

• measuring, by a first temperature sensor, a first temperature of the shipment,
• measuring, by a second temperature sensor, a second temperature of the shipment,
• transmitting, by a communication module the measured temperature data to an external data processing device,
• comparing the resulting temperature data from the first temperature sensor with the resulting measurement data from the second temperature sensor, where in case the comparison results in a deviation exceeding a pre-defined limit,
• issuing a re-calibration request command for the wireless data logger
• wherein the first temperature sensor is arranged in a housing of the wireless data logger and the second temperature sensor is arranged in the vicinity and adjacent to an outer side of the housing,
• wherein the measurement by the first temperature sensor is performed when the communication module is turned-off and no transmission is taking place.