Electronically readable colorimetric sensor

A colorimetric based sensor system comprising:

• a low power communication system to receive an interrogation signal from an interrogator and to broadcast data to the interrogator;
• a controller operatively connected to said low power communication system;
• a light emitter, operatively connected to said controller, to emit light;
• a light detector, operatively connected to said controller, to convert receive light into electrical signals;
• a colorimetric based sensor, having a changeable color patch and in optical communication with said light detector and said light emitter, to measure a condition of an object of interest;
• and
• a thermal material, thermally connected to said colorimetric based sensor, having thermal characteristics such that said thermal material reaches a predetermined temperature after a predetermined period of time;
• said colorimetric based sensor causing said changeable color patch to change color when said thermal material has reached said predetermined temperature;
• said light emitter being positioned to emit light onto said changeable color patch of said colorimetric based sensor;
• said light detector being positioned to receive light reflected from said changeable color patch of said colorimetric based sensor said colorimetric based sensor causing said changeable color patch to change color based upon a measured condition of the object of interest;
• said light detector communicating the electrical signals converted from the received light to said controller;
• said controller, in response to the received electrical signals from said light detector, generating data representing a characteristic of the measured condition of the object of interest;
• said controller, in response to the interrogation signal received by said low power communication system, causing said low power communication system to broadcast the generated data to the interrogator.

A colorimetric based sensor system comprising:

• a low power communication system to receive an interrogation signal from an interrogator and to broadcast data to the interrogator;
• a controller operatively connected to said low power communication system;
• a light emitter, operatively connected to said controller, to emit light;
• a light detector, operatively connected to said controller, to convert receive light into electrical signals;
• a colorimetric based sensor, having a changeable color patch and in optical communication with said light detector and said light emitter, to measure a condition of an object of interest;
• and
• a thermal mass, thermally connected to said colorimetric based sensor, having thermal characteristics such that said thermal mass reaches a predetermined temperature after a predetermined period of time;
• said colorimetric based sensor causing said changeable color patch to change color when said thermal mass has reached said predetermined temperature;
• said light emitter being positioned to emit light onto said changeable color patch of said colorimetric based sensor;
• said light detector being positioned to receive light reflected from said changeable color patch of said colorimetric based sensor
• said colorimetric based sensor causing said changeable color patch to change color based upon a measured condition of the object of interest;
• said light detector communicating the electrical signals converted from the received light to said controller;
• said controller, in response to the received electrical signals from said light detector, generating data representing a characteristic of the measured condition of the object of interest;
• said controller, in response to the interrogation signal received by said low power communication system, causing said low power communication system to broadcast the generated data to the interrogator.