Laboratory and scientific equipment in the nature of ductless fume enclosures; biological, pharmaceutical and chemical safety workstations in the nature of self-contained isolation enclosures not for medical purposes for use in analyzing and testing laboratory samples and pharmaceutical compounding; weighing enclosures in the nature of self-contained isolation chambers for non-medical purposes for use in weighing compounds and samples; microscope enclosures in the nature of self-contained isolation chambers for non-medical purposes for use in microscopic viewing and analyzing biological and chemical samples for forensic, laboratory, pharmaceutical and medical research use; ductless fume enclosures and self-contained isolation enclosures not for medical purposes for use in microscopic viewing and analyzing laboratory samples; powder handling enclosures namely, self-contained isolation enclosures not for medical purposes for use in analyzing and testing powder samples for forensic, laboratory and medical research use and for use in pharmaceutical compounding; polymerase chain reaction (PCR) workstations, namely, self-contained isolation enclosures for laboratory purposes and not for medical purposes for use in manipulating and amplifying DNA and RNA samples for forensic, laboratory and medical research use; forensic workstations, namely, self-contained isolation enclosures not for medical purposes for use in analyzing and testing samples for forensic, laboratory and medical research use; ductless fume enclosures and self-contained isolation enclosures not for medical purposes for use in solvent cleaning and metal etching; ductless fume enclosures and self-contained isolation enclosures for laboratory purposes and not for medical purposes for use in tissue staining, biological sample preparation, pathology and molecular biology; airflow control and monitoring devices, namely, electronic sensors for monitoring the air flow through air filters; air filter monitoring devices, namely, electronic sensors for monitoring the air flow through air filters; monitoring devices, namely, electronic sensors for detecting chemicals and gases; monitoring devices, namely, electronic sensors for monitoring temperature and humidity; ductless fume hoods, namely, ductless fume enclosures

Ventilation, exhaust and air filtering apparatus used in forensic, manufacturing, medical, pharmaceutical and scientific laboratory settings in the nature of ventilation hoods and air filters for ventilation hoods; dead-air boxes, namely, portable air filtering cabinets and enclosures comprised of air extracting and ventilating hoods and air filters for forensic, manufacturing, medical, pharmaceutical and scientific laboratory use; recirculating fume hoods, namely, ventilation hoods and air filters for ventilation hoods; chemical fume hoods, namely, ventilation hoods, air filters for ventilation hoods, and air extracting and ventilating hoods for forensic, medical, pharmaceutical and scientific laboratory use; air purifying units for forensic, manufacturing, medical, pharmaceutical and scientific laboratory settings; fume extractors, namely, ventilators for the removal of gas, fumes and steam