Thermal resistance fuses two kind of way

Thermal resistance fuses two ways

the heat resistance of two ways: lead two wire: in a thermal resistance on both ends of the connection wire to elicit resistance signal way call two wire: this method is easy to lead, but as a result of connecting wires must be lead resistance r, r size and material of the wire and the length of the element, and this method is only applicable to lead low measurement precision of place

four wire: in the root systems of thermal resistance on both ends of the connection of two wire way called four wire, two of the root lead to provide constant current (I) for thermal resistance, the voltage signal into r U, after another two leads to guide U to secondary instrument. Visible this way lead to the alleviation of the thermal resistance effect of lead, important for high precision temperature detection.