Measure relative humidity and dew point. Thermometers are mounted with their bulbs well away from the back to provide unimpaired circulation of the air. A glass cistern is mounted below the thermometers on a 12 cm x 23 cm, mahogany-finished panel.
Contains mercury. Includes extra wick, relative humidity tables and instruction booklets.
Note: mercury is not available for shipment in some states. Consult your local regulations.