electrochemical testing and diagnostic devices in the nature of systems comprised of testing equipment, namely test stands, test sensor cartridges, test swab cartridges, viles, potentiostat devices, and galvanostat devices, for use in diagnostic testing, not for medical purposes, for detecting and identifying substances in surface swabs, saliva samples, chemical samples, liquid samples, and soil samples in law enforcement investigations, forensic science applications, and agronomic and soil science applications; lab-on-a-chip devices, namely, testing devices in the nature of devices for detecting explosives, gun powder, accelerants, narcotics and other controlled substances, toxic industrial chemicals, contaminants, and pollutants for security, forensic and agronomic purposes; electrodes in the form of test strips for electrochemical testing; testing sensor cartridges for functionalized thin film chemistry immobilized reagent sensing for electrochemical testing; and testing sample collection devices, namely, swabs for use in diagnostic testing, not for medical purposes