Abstract: A chemical impairment detection system adaptable for use in a vehicle. The impairment detection system includes an intake adapted to receive an air sample from a source and an alcohol sensor for detecting an alcohol level in the air sample. An integrated breath chamber channels the air sample from the intake to the alcohol sensor. Source evaluator means in the breath chamber measure one or more characteristics of the received air sample for validating the sample. The source evaluator means measures the air sample characteristics as the air sample flows through the breath chamber.

Abstract: A chemical impairment detection system adaptable for use in a vehicle. The impairment detection system includes an intake adapted to receive an air sample from a source and an alcohol sensor for detecting an alcohol level in the air sample. An integrated breath chamber channels the air sample from the intake to the alcohol sensor. Source evaluator means in the breath chamber measure one or more characteristics of the received air sample for validating the sample. The source evaluator means measures the air sample characteristics as the air sample flows through the breath chamber.

Abstract: A method and system for measuring the current flowing through an electric meter. The electric meter includes a reactive sensor positioned in series with a bus bar contained in the meter. The reactive sensor includes an inductor and the voltage across the inductance is measured. A control unit contained in the electric meter calculates the current based on the detected voltage and the value of the inductor. The value of the inductor is determined by passing a reference current through the inductor at a known frequency, such as 50 Hz or 60 Hz, and the voltage drop across the inductor is measured. Once the value of the inductor is determined, the value is stored in the control unit.

Abstract: A method and system for measuring the current flowing through an electric meter. The electric meter includes a reactive sensor positioned in series with a bus bar contained in the meter. The reactive sensor includes an inductor and the voltage across the inductance is measured. A control unit contained in the electric meter calculates the current based on the detected voltage and the value of the inductor. The value of the inductor is determined by passing a reference current through the inductor at a known frequency, such as 50 Hz or 60 Hz, and the voltage drop across the inductor is measured. Once the value of the inductor is determined, the value is stored in the control unit.