发明授权
US06004201A Sensor assembly for controlling the ventilation of indoor spaces 失效
用于控制室内空气通风的传感器组件

Sensor assembly for controlling the ventilation of indoor spaces
摘要:
A pair of pollution sensors which react oppositely to exposure to respective different pollutants are connected together in one or more voltage-divider circuits so that a combined output voltage always becomes either more negative or more positive regardless of which sensor is responding to the presence of the respective pollutant. For example, a tin-dioxide sensor for gasoline exhaust and a tungsten-trioxide sensor for diesel exhaust can be connected in series as a voltage divider with a center tap connected to an evaluating circuit.
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