1. Hazardous Locations List

2. NEMA Enclosure Types

The Physics of Humidity:
    Ideal Gas Laws
     Barometric Pressure and Partial Pressure
     Vapor Pressure Above a Liquid
     Vapor Pressure Above Pure Water
     Vapor Pressure of Water Mixed with Another Substance
     Vapor Pressure Above Ice

Humidity Definitions:
    D_v: Vapor Concentration (Absolute Humidity)
     Q: Specific Humidity
     R: Mixing Ratio by Weight
     PPMv: Mixing Ratio by Volume (parts per million)
     %RH: Relative Humidity
     DP: Dew Point and Frost Point Temperature
     Wet Bulb Temperature
     H: Enthalpy

Effects of Temperature and Pressure on Humidity
    Effect of Temperature and Pressure on Vapor Pressure (Dew Point)
     Effect of Temperature and Pressure on %RH
     Effect of Temperature on RH
     Effect of Pressure on RH