Patent ID: 8716629

Claim:
A temperature sensor for body temperature measurements comprising: a first fabric layer having a central heater embedded therein; a second fabric layer attached to the first layer having at least one first thermistor embedded therein for measuring a first temperature value; at least one third fabric layer having at least one second thermistor embedded therein separated from the first thermistor for measuring at least one second temperature value, the at least one third layer being configured to contact skin of a body for conducting a heat flux escaping from the body through the layers, a difference between the first and the second temperature values indicating the heat flux from the body; a processing unit which (1) controls heat emitted from a central heater to tune the emitted heat oppositely to the heat flux until a zero heat flux is reached and (2) reads out the temperature at the at least one second thermistor at zero heat flux which indicates the body temperature; and a transmitter for transmitting the temperature measured at the at least one second thermistor at zero heat flux to an external monitoring device comprising a receiver.