FIELD: measuring equipment.
SUBSTANCE: invention relates to temperature measuring devices. Infrared sensor includes thermopile for producing a voltage as a function of temperature of a point of interest, resistance temperature detector (RTD) that varies in resistance as a function of ambient temperature, the RTD is connected in a series circuit with the thermopile. Sensor also includes first and second leads connected to a first RTD terminal in the RTD, third lead connected to the second RTD terminal in the RTD and a first thermopile terminal, and the fourth lead connected to a second thermopile terminal. Second and third leads are configured to transmit the excitation current to and from the RTD, and the first and fourth leads are configured to provide an electrical circuit capable of measuring the voltage on said serial circuit without passing the excitation current through the first and fourth leads.
EFFECT: increased measurement accuracy.
19 cl, 2 dwg
