H.E.P.A.

 

High-Efficiency Particulate Air, throw away media dry type filter in a rigid frame having a minimum particle efficiency of 99.995% for 0.3 micron particles.

 

U.L.P.A.

 

Ultra-Low Particulate Air, throw away media dry type filter in a rigid frame having a minimum particle efficiency of 99.999% for 0.1 micron particles.

 

Laminar Airflow

 

Air moving at the same speed/direction with no or minimal cross over of streams.

 

CFM      

 

Cubic foot per minute, volume flow rate.

 

FPM

 

Feet per minute, air velocity. (distance traveled per unit of time is usually expressed in feet per minute)

 

BTU (British Thermal Unit)

 

• The quantity of heat required to raise the temperature of one pound of water from   60° to 61°F at a constant pressure of one atmosphere.
  

• The quantity of heat equal to 1/180 of the heat required to raise the temperature of one pound of water from 32° to 212°F at a constant pressure of one atmosphere.

 

Riser

 

A framing structure used to increase the work surface height of a standard Horizontal Laminar Flow from 32.75 to 36.75, 38.75 or 40.75 inches. Unit can be added on to existing units in the field.

 

Magnehelic

 

Instrument used to monitor pressure within the plenum chamber of the filter module. Increased static pressure indicates the need to adjust the air flow of the work station or when this is no longer possible replace the filter assembly.

 

Germicidal lamp

 

The Germicidal bulb is a special glass that transmits ultraviolet radiation of 253.7 nanometer wavelength generated by the arc. Radiation of this wavelength kills a wide variety of bacteria and molds.

 

Diopter

 

Term used to identify the amount of power in a lens. Each diopter increases magnification by approximately 25%.

 

•