Abstract: Some aspects of the technology described herein are directed to a thermal sensor and corresponding systems and methods for mitigating errors arising from non-radiative heat flow. The thermal sensor system, comprising: a thermal sensor comprising and a housing. The thermal sensor comprising: a thermal detection region of a sensor substrate; a thermal reference region of the sensor substrate; and an array of thermocouples configured to detect a thermal differential between the thermal detection region and the thermal reference region. The housing configured to support the thermal sensor within the housing and beneath a windowed aperture of the housing, wherein the windowed aperture is configured such that radiative energy may transmit through the windowed aperture and be received by the thermal sensor.

Abstract: A motion sensing device includes an infrared radiation (IR) sensor configured receive signal IR from a warm object and background IR to produce a direct current output. A first transformation filter receives the direct current output and produces a filtered background. A second transformation filter receives the direct current output and produces a filtered signal. A rating compares the filtered signal and the filtered background to produce a result signal based on a detected difference between the filtered signal and the filtered background.