The process of an adsorbate (molecules, biomolecules, ions, or atoms) adhering to and accumulating on the surface of a substance. The adsorbent can be a liquid, gas, or a solid with dissolved surface molecules.
A device used to remove airborne contaminants. Most cleanroom air filters are comprised of fibers that are designed to capture particulates like dust, bacteria, pollen, chemicals, and mold spores through adsorption, straining, absorption, or static electric charge.
A dedicated space that facilitates the movement of objects or people between vessels or rooms of varying pressures. The air lock provides a space that is sealed by two airtight doors that are opened and closed successively to prevent the mixing of different gases or the alteration of pressures.
A specialized chamber that utilizes forced air to remove any particulate matter from a person or object before accessing a cleanroom facility. In order to minimize contamination, a cleanroom air shower often uses an air filter to capture any dust, bacterial, pollen, or mold that may be present on the surface of a person or object.
The rate of air movement measured in distance traveled relative to time elapsed. Air velocity is commonly measured in meters per second (m/s) or feet per minute (ft/min).
Stream of air as it passes over the surface of a moving object or within a wind tunnel where air may move over the surface of a stationary object.
The consistency of which a stream of air passes over the surface of an object. Measured in volume occupied relative to time elapsed. Common airflow uniformity is measured in cubic meters per second (m³/s), liters per second (L/s), or cubic feet per minute (ft³/min).
Commonly used acronym for Air Conditioning, Refrigeration, & Building Services. ARBS refers to a large trade event that is held every two years for heating, ventilation, air conditioning, refrigeration, and other building related industries.
Commonly used acronym for the American Society of Heating, Refrigerating, and Air-Conditioning Engineers. This international organization has a mission to advance the HVAC & R (heating, ventilation, air-conditioning, and refrigeration) industries to better serve humanity and promote sustainability. ASHRAE accomplishes their mission through research and continuing education programs as well as through the writing and publishing of industry standards and a variety of other resources.
Bio Safety Hood Classification
Classification used to determine the levels of containment a fume hood will provide in regards to potential contamination by hazardous vapors, gases, and particles.
Class 1 - 100,000 Cleanrooms
Classification levels that indicate the acceptable number of particles in a cubic foot of cleanroom space. Class levels are generally determined from the number of 0.5 micron or larger particles per cubic foot.
A designated space that is closely controlled for compliance to limitations that have been outlined for operating procedures, air cleanliness, air pressure, temperature, relative humidity, and air flow patterns. A number of devices and procedures are often used in a cleanroom to monitor the viability of airborne particles.
Non-shedding apparel that is designed specifically to serve as a barrier between cleanroom environments and possible contaminants released by cleanroom workers. Cleanroom garments may include footwear, shoe covers, coveralls, gowns, smocks, gloves, face masks, and head coverings.
Classification system used to determine the acceptable concentration of particles in an identified volume of air given specific particle size parameters. Classification levels are determined by the federal government.
A space or system of spaces in which there are tightly controlled limits that govern air flow, air pressure, air filtration, temperature, relative humidity, viability of airborne particles, access, and operating procedures.
Furnishings that are designed specifically for convenient dispensing of cleanroom-safe products. Cleanroom dispensers can be used for a variety of products.
Cleanroom Facility - As Built
Cleanroom facility that is prepared for operation in terms of construction and systems but without staff present or manufacturing equipment in place.
Cleanroom Facility - At Rest
Cleanroom facility that is fully equipped for operation with the exception of staff on site.
Cleanroom Facility - In Operation
Cleanroom facility that is equipped and staffed for full operations, with all staff, equipment, and supplies present.
Water based acrylic epoxy paint for cleanrooms that provides a durable and stain resistant finish for all cleanroom walls, ceiling, and floors.
Area that provides full enclosure with controlled ventilation systems and regulated access.
The utilization of filters and controlled ventilation systems in a designated space for capturing and containing potential contaminants.
A sealable enclosure that contains desiccants or nitrogen gas that are used to prevent reactions between moisture-sensitive materials and atmospheric humidity.
Electrostatic Discharge (ESD)
The transfer of electric charge between two surfaces as a result of friction.
Federal Standard 209E
Government imposed standards for air quality in a cleanroom. The standards designate classes of cleanrooms and clean zones based on the size and concentration of particles of in a given volume of air.
Cabinet that has in air flow thus protecting operator from dangerous or noxious vapors or particles.
Controlled enclosure that incorporates sealed gloves into the design, allowing for manual control of items and materials that must remain in a restricted environment.
Prefabricated room that has rigid walls and constructed to meet stringent cleanroom requirements. Hardwall cleanrooms may be incorporated into existing structures or may stand alone. Can be single pass or re-circulating air. Hardwall cleanrooms can sustain posivite pressure. Can be ISO 3-8.
High Efficiency Particulate Air (HEPA) filter constructed to withstand high airflow levels. Measurements are estimated at 944 L/s at 350 Pa initial resistance.
HEPA Filter Module
High Efficiency Particulate Air (HEPA) filter that is integrated into a disposable housing for use in cleanroom ceiling installations. HEPA filter modules are usually available in fan-assisted and non-fan-assisted variations.
HEPA High Temperature
High Efficiency Particulate Air (HEPA) filter that is constructed using materials that can withstand temperatures up to 400°C, providing filtration for cleanroom and laboratory ovens. High temperature filters use stainless steel