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US 12,638,600 B2Granted
Sensor
AssigneeAirthings ASA
InventorBjørn Magne Sundal
Life of this patent
Estimating the term…
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AssigneeAirthings ASA
InventorBjørn Magne Sundal
Estimating the term…
A sensor comprising: a printed circuit board; a photosensor mounted on a first side of the printed circuit board; and a light source mounted on a second, opposite side; wherein the light source is arranged to transmit light through at least a portion of the printed circuit board, which is impermeable to air. Positioning of the light source on the opposite side of the printed circuit board from the photosensor means that the bulk of the printed circuit board lies between the light source and the photosensor, obstructing direct transmission of light from the light source to the photosensor. However, light can be transmitted through the printed circuit board itself without drilling a hole through the printed circuit board. In this way, the light source can be mounted on the opposite side of the printed circuit board from the photosensor while still transmitting light to the photosensor.
A radon gas sensor comprising:
A method of testing a radon gas sensor comprising a photosensor mounted on a first side of a printed circuit board and an opaque diffusion chamber mounted on the first side of the printed circuit board over the photosensor, the method comprising:
Dependencies are inferred from the claim text.