Calibration and Accuracy Check System

Abstract

Calibration and accuracy check systems for a chemical sniffer, such as a breath alcohol tester, which utilize the dispensing of droplets with determinable concentration of alcohol and/or other liquids in a determinable number either directly to a reaction chamber, or into a carrier gas which can be sampled. The systems generally provide for accurate sample concentration being provided to the breath tester while also providing for a simplified system which can be easier to move, and require less operational complexity, than prior wet or dry calibrating systems.

1 . A calibration system for a breath tester comprising:
 a storage reservoir containing a mixture of water and an alcohol at known concentration;   a dispensing head for dispensing said mixture, said dispensing head including a nozzle for ejecting said mixture from said storage reservoir;   wherein said dispensing head injects said mixture directly into a reaction chamber of said breath tester.   
     
     
         2 . The system of  claim 1  wherein said alcohol comprises ethanol. 
     
     
         3 . The system of  claim 1  wherein said alcohol comprises methanol. 
     
     
         4 . The system of  claim 1  wherein said mixture also comprises an interfering substance. 
     
     
         5 . The system of  claim 1  wherein said dispensing head dispenses said mixture into a carrier gas.