Description
Technical Specification Table
| Specification | Details |
|---|---|
| Type | Standard Fortin’s Mercury Barometer |
| Altitude Suitability | Up to 600 meters |
| Tube Bore | 7 mm nominal |
| Tube Casing | Enameled and lacquered brass |
| Mounting | Polished wooden board, wall mounting provision |
| Scale Material | Chemically engraved silver scales |
| Scale Graduations | mm and 1/10 inch |
| Vernier Least Count | 0.05 mm Hg and 0.002 inch Hg |
| Vernier Movement | Rack and pinion mechanism |
| Scale Range | 675 to 810 mm Hg and 26 to 32 inch Hg |
| Visibility | Glass cylinder with white reflecting background |
| Pointer | Ivory pointer with adjustment screw |
| Cistern Adjustment | Set to fiducial point before reading |
| Vertical Support | Ring support with three locking screws |
| Thermometer Range | -10 to +50°C |
| Supplied Items | Working instructions |
| Mercury | Supplied without mercury |
Key Features
• Highly accurate standard mercury barometer
• Suitable for altitudes up to 600 meters
• 7 mm bore glass tube enclosed in brass casing
• Enameled and lacquered brass finish for durability
• Wall-mounting provision on polished wooden board
• Chemically engraved silver scales in mm and inch
• Vernier with 0.05 mm Hg and 0.002 inch Hg least count
• Rack and pinion movement for smooth vernier adjustment
• Glass cylinder enclosure for safe visibility
• Range of 675 to 810 mm Hg and 26 to 32 inch Hg
• Reflecting white background for easy scale reading
• Ivory pointer with adjustment screw on the cistern end
• Secure vertical positioning with ring support and locking screws
• Built-in thermometer for ambient temperature measurement
• Supplied with full working instructions
• Barometer supplied without mercury
Working Principle
Fortin’s Barometer measures atmospheric pressure by comparing the height of a mercury column with an adjustable cistern level. Before taking a reading, users adjust the mercury in the cistern to the fiducial point using the ivory pointer. The mercury column then shows the pressure height on the engraved scale. The vernier provides fine adjustment for accuracy. As atmospheric pressure changes, the mercury column rises or falls. Users read the exact height using the vernier and thermometer for temperature reference.
Use Cases
• Physics and atmospheric science laboratories
• Weather observation and climate studies
• Training and educational demonstrations
• Altitude and pressure comparison studies
• Research experiments requiring accurate pressure data
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