Patent ID: 9645112
Date: 2017-05-09
CPC Classifications: G01N

Claim:
1. An auto-cleaning and auto-zeroing system for use with a Photo-Ionization Detector (PID), said system comprising: an ionization chamber having an outflow conduit; a first conduit for inflow of ambient gas to be measured; a second conduit for flow of cleaned ambient air; a cleaning chamber, receiving ambient air from the environment and removing pollutants and contaminants in said ambient air, having an output in communication with said second conduit; a valve, in communication with said first conduit and said second conduit, to direct flow from one of said first conduit and said second conduit into said ionization chamber; a bypass conduit in communication with an output of said valve; a splitter connector having two inlets, a first inlet in communication with the outflow conduit of said ionization chamber and a second inlet in communication with said bypass conduit, and having an outlet, wherein said splitter allows one of said two inlets to pass to said outlet, such that air is trapped in said ionization chamber when said second inlet is in communication with said outlet; and a continuous motor to continuously operate a pump, the pump disposed downstream from said outlet.