When the fluid levels are the same, the weather is changing.
When the
red fluid level is below the blue fluid level, the weather is fair (high pressure pushes the red fluid down in the tube).When the
red fluid level is above the blue, stormy weather is predicted (low pressure allows the red fluid to move up the tube).By measuring the amount of difference between the red and blue fluids on the tendency dial, you get the local weather forecast for the next 12-24 hours.
The beautiful wood frame is made from European walnut with black trim and the unit has colorful nautical flags along the right side.
The thermometer measures in Fahrenheit and Celsius. The tendency dial also measures air pressure in millibars. It measures 19 inches high by 7 inches wide and shipping weight is 3lbs. The unit comes fully assembled and includes a calibration kit to adjust the unit for altitudes above sea level.
Size: 19" H by 7" W
Shipping: $5.95 Shipping in the Continental U.S.
Availability: In Stock. Usually ships in 1-3 business days.
Item NOT available for international shipping.
DD Barometer Main Page 
