Biomaterial Database

An automated flow-temperature-humidity control system. 1980

G O Nelson, and R D Taylor

An automated system that controls air flow, temperature, and humidity has been developed from a commercially available temperature=humidity indicator and a specially built flow-temperature-humidity control module. Parameters are set using direct-reading dials on the control module. The air flow is maintained using a mass-flow controller while process controllers connected to the indicator regulate humidity and temperature. The system will run indefinitely without need for operator intervention. If the module and indicator are calibrated properly, accurate air flows (+/- 2% of full scale), temperatures (+/- 0.3 degrees C), and humidities (+/- 2% RH) can be achieved.

UI	MeSH Term	Description	Entries
D004780	Environment, Controlled	A state in which the environs of hospitals, laboratories, domestic and animal housing, work places, spacecraft, and other surroundings are under technological control with regard to air conditioning, heating, lighting, humidity, ventilation, and other ambient features. The concept includes control of atmospheric composition. (From Jane's Aerospace Dictionary, 3d ed)	Clean Rooms,Laminar Air-Flow Areas,Controlled Environment,Area, Laminar Air-Flow,Clean Room,Controlled Environments,Environments, Controlled,Laminar Air Flow Areas,Laminar Air-Flow Area,Room, Clean
D004864	Equipment and Supplies	Expendable and nonexpendable equipment, supplies, apparatus, and instruments that are used in diagnostic, surgical, therapeutic, scientific, and experimental procedures.	Apparatus and Instruments,Devices,Medical Devices,Device, Medical,Devices, Medical,Equipment,Inventories,Medical Device,Supplies,Device,Instruments and Apparatus,Inventory,Supplies and Equipment
D006813	Humidity	A measure of the amount of WATER VAPOR in the air.	Humidities
D013696	Temperature	The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.	Temperatures
D014691	Ventilation	Supplying a building or house, their rooms and corridors, with fresh air. The controlling of the environment thus may be in public or domestic sites and in medical or non-medical locales. (From Dorland, 28th ed)	Ventilations