Dampened Deluxe Quartz Barograph - Weems Plath 410-D

Keep precise records of barometric pressure readings with this extraordinary German-made Dampened Deluxe Quartz Barograph.

This mechanical barograph with eight round diaphragms measures variation in the air pressure and transfers the information very precisely through a system of mechanical levers to the writing arm.

The battery operated quartz movement rotates the solid brass drum once a week, requires no winding, and is more accurate than key-wound movements.

The conventional ink nib and messy ink bottle are replaced by a convenient felt tip pen which lasts 6 to 9 months.

This barograph model includes a bottle of oil damping fluid for the arm to avoid incorrect readings when on ships or yachts at sea.

The elegant mahogany and glass case is polished to a high luster finish and is hinged for easy access to the movement for change of paper and pen.

Features:

• Both inch and millibar charts are available
• Eight diaphragm bellows provide maximum sensitivity & precision
• Hinged mahogany case with glass sides provides easy access to chart drum
• Quartz movement requires no winding
• Chart duration: 7 days
• Included are: One-year supply of weekly inch charts (108), AA battery, one black felt tip pen (451) (lasts 6-9 months), Damping fluid (110)
• Millibar charts (107) available separately

Specifications:

• Case dims: 11" x 6 3/4" x 6 1/2" (279 x 171 x 165 mm)
• Chart size: 3 5/8" (92 mm)
• Chart range: 28.5 to 31"