Freshness sensor devices and related methods

A system for detecting freshness of a perishable item, comprising:

• a substrate;
• a sensor printed on the substrate, wherein the sensor is a binary sensor, an integrated circuit for converting data from the sensor into a signal;
• an antenna portion for receiving and transmitting the signal from the integrated circuit, whereby the sensor, the integrated circuit, and the antenna portion are printed on a single sheet such that the device is unitary;
• and
• a first receiving device for receiving the signal from the antenna portion via a software application running on the first receiving device and converting the signal into a freshness value for the perishable item,
• wherein the antenna portion is configured to collect energy from an aerial device to activate the integrated circuit, and the integrated circuit is configured to cause the antenna to broadcast a unique identifier specific to the perishable item, pulse test a signal through the at least one sensor to detect voltage drop data across the at least one sensor, and cause the antenna portion to transmit the voltage drop data to the first receiving device.

A sensor tag for detecting freshness in an environment, comprising:

• a chemical sensor for detecting a change in the environment, wherein the chemical sensor is a binary sensor;
• an integrated circuit for converting a signal relating to the change into deliverable information;
• and
• an antenna for receiving and transmitting the deliverable information, whereby the chemical sensor, the integrated circuit and the antenna portion are printed on a paper substrate,
• wherein the antenna is configured to collect energy from an aerial device to activate the integrated circuit, and the integrated circuit is configured to cause the antenna to broadcast a unique identifier specific to the change in the environment, pulse test a signal through the chemical sensor to detect voltage drop data across the chemical sensor, and cause the antenna to transmit the voltage drop data to an external receiver.