July 22 Marks 150 Years Since the Civil War Battle of Atlanta. 1  Georgia Tech had not yet been founded when the Civil War was fought, but that doesnât mean the Institute has no connections to the war.
A photoionization detector or PID is a type of gas detector. Typical photoionization detectors measure volatile organic compounds and other gases in concentrations from sub parts per billion to 10 000 parts per million (ppm).The photoionization detector is an efficient and inexpensive detector for many gas and vapor analytes.A PID may produce instantaneous readings and operate continuously. These hand-held, battery-operated detectors are widely used in military, industrial, and confined working facilities for safety.he first commercial application of photoionization detection was in 1973 as a hand-held detector for the purpose of detecting leaks of volatile organic compounds (VOC's), specifically vinyl chloride monomer (VCM), at a chemical manufacturing facility.
Marijuana Drug Test - THC Testing. This is a dip strip drug test that detects one drug at a time, a single panel drug test (1 drug assay). Here, we show a cannabis drug test to test for marijuana (THC drug testing). OrAlert - Oral Saliva Drug Test. Above is a mouth swab drug test, sometimes referred to as the Spit Drug Test.