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Fortin Barometer
Fortin Barometer (Product Code: SCL-268/032) is a mercury barometer used to measure atmospheric pressure precisely in school and college physics laboratories. Before each reading the mercury in the cistern is set to a fixed zero called the fiducial point, and the column height is then read on a clear linear scale with a vernier, which makes it a classic teaching item among physics lab instruments. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Type | Fortin barometer (mercury column with cistern reservoir) |
| Mounting | Vertically mounted, on a wall or suitable pillar |
| Valve | Stop cock |
| Zero setting | Mercury level at the bottom of the cistern adjusted to the scale zero (fiducial point) before each reading |
| Reading | Clear, easy-to-read linear scale with vernier adjustment |
| Tube | Air evacuated from the top of the mercury tube; lower end fixed in the cistern reservoir |
| Transport | Carry flat or upside down only |
| Product code | SCL-268/032 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is a Fortin Barometer Used For?
A Fortin Barometer shows atmospheric pressure as the height of a mercury column. Because the space above the column has been emptied of air, only the pressure of the atmosphere on the cistern holds the mercury up, which makes it an effective way to teach Torricelli's principle. Labs also use the day's reading when working on gas-law practicals or correcting boiling-point measurements taken with a hypsometer.
To take a reading, turn the adjusting screw until the mercury surface in the cistern just meets the fiducial point, then set the vernier to the top of the mercury column at eye level and add the vernier reading to the main scale value. Note the room temperature with each reading, as precise barometer readings are normally corrected for it. Mount the instrument where students cannot knock it, and follow your institution's mercury-handling rules for any spill.
OEM Manufacturer
Jain Scientific Equipments Private Limited, known by its ScienceLab brand, is the OEM (original equipment manufacturer) of this Fortin Barometer and makes it at its own licensed factory at Saha, Ambala, Haryana, India. Buying from the manufacturer means installation and handling questions go straight to the maker, and replacement parts can be requested from the same source; ask us about availability. Schools, colleges, dealers and importers all receive quotations factory-direct. Learn more on the ScienceLab profile page.
Related Physics Lab Equipment
These items are commonly used alongside a Fortin Barometer for pressure and heat practicals:
- Aneroid Barometer — a mercury-free barometer for comparison readings
- Metal Barometer — another barometer option for the lab or classroom
- Hypsometer — boiling-point work that needs the day's pressure reading
- Plumb Line Level — to check that the barometer hangs truly vertical
Browse the Physics Lab category for more instruments.
Frequently Asked Questions
How does a Fortin Barometer work?
A Fortin Barometer balances atmospheric pressure against a column of mercury. Air is evacuated from the top of the tube and its lower end sits in a mercury cistern, so the height of the column read on the scale indicates the atmospheric pressure.
What is the fiducial point on a Fortin Barometer?
The fiducial point on a Fortin Barometer is the scale zero. Before every reading, the mercury level in the glass at the bottom of the cistern is adjusted to meet it, so each column reading starts from the same reference level.
How precise are Fortin Barometer readings?
The Fortin Barometer uses a vernier adjustment on its clear linear scale for extra reading accuracy. For the vernier least count and scale units of the model you are quoted, please ask us through the contact page.
How should a Fortin Barometer be moved after installation?
To move a Fortin Barometer, turn the adjustment screw until mercury fills the reservoir and the column is about 25 mm from the top of the scale. Lift it off the wall, tilt it gently and lay it flat, then turn the screw further until a small air gap remains in the reservoir.
How should a Fortin Barometer be carried and re-hung?
A Fortin Barometer can be moved without risk of damage as long as it is always carried flat or upside down. To re-hang it on the wall or pillar, reverse the moving procedure step by step before taking the next reading.
Is mercury included with the Fortin Barometer?
How the Fortin Barometer is dispatched, including its mercury, should be confirmed with us before ordering, since transport rules for mercury differ by destination. Ask through the contact page and the details will be stated in your quotation.
Who manufactures the Fortin Barometer?
The Fortin Barometer (code SCL-268/032) is manufactured by Jain Scientific Equipments Pvt Ltd, trading as ScienceLab, as the OEM at its own factory in Saha, Ambala, Haryana, India, for buyers in India and international markets.
Request a Quote
For a Fortin Barometer quotation, contact us through the contact page or add it to the enquiry cart with your delivery location. The quotation comes direct from the manufacturer.
Last updated: 24 September 2026
