The RBT VXL consists of an Alco-Sensor® VXL, a docking station, a keyboard and a printer. The Alco-Sensor® VXL is programmed to prompt the operator through a step-by-step test sequence that . . . .
1.allows for data entry of subject, operator and other test information through the keyboard
2.automatically collects and analyzes a breath sample
3.produces a displayed, printed and stored-to-memory test record
The AlcoSensor IV follows an automated, software driven test protocol. Each function is displayed on an LED panel, which provides the operator with step-by-step instructions for fail-safe testing. The AlcoSensor IV automatically samples deep lung breath and displays results in a three-digit readout. The unit has automatic calibration and a mouthpiece release feature which eliminates operator contact with a used mouthpiece.
The instrument monitors the subject's breath flow and volume and determines when the subject has provided a deep lung breath sample. If a proper sample is provided, the instrument automatically collects a breath sample and presents it to the fuel cell sensor for analysis.
The electro-chemical (fuel cell) is a porous disk with a thin layer of platinum black on both faces and saturated with electrolyte. When the subject's breath sample is drawn across the top surface of the cell, the alcohol that comes in contact with the cell's surface is broken down chemically. The alcohol is converted to acetic acid plus electrons. The number of electrons generated are in proportion to the amount of alcohol in the sample. By measuring the number of electrons (the resulting electrical signal) the output is converted to a digital BrAC (Breath Alcohol Concentration) value.