The RH calibration kit includes the following items:

• three clear, sealable containers
• one container with magnesium chloride solution
• one container with sodium chloride solution
• two wooden scrapers
• an insulated carrying case to hold all of the above and maintain a stable environment while performing calibration

The large container is used to create a stable environment. The small containers are used to hold the saturated salt solution. The saturated salt solutions generate well-defined humidities when they are confined to a contained environment.