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Open Manometer
The Open Manometer (Product Code: SLE/CH/75) is a borosilicate glass manometer tube with a long 50 cm arm and a funnel top, offered as the replacement tube for an open-type manometer. It turns an invisible pressure difference into a visible difference in liquid level, which is why teachers in school and college laboratories use it for practicals on gas and liquid pressure. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, as part of its chemistry lab equipment in India for schools, colleges and distributors.
Specifications
| Parameter | Detail |
|---|---|
| Type | Open manometer tube (replacement tube for the Open Manometer) |
| Material | Borosilicate glass |
| Arm length | 50 cm (19.7 in) |
| Top end | Funnel top for filling the manometric liquid |
| Supplied as | Glass tube; a stand, scale or tubing is not listed as included |
Typical Use
An open manometer compares a pressure with the atmosphere: one side is connected to the source under test while the other stays open to the air, and the gap between the two liquid levels shows how far the pressure is above or below atmospheric. The funnel top lets students pour in the liquid without spilling, and the 50 cm arm leaves enough height for a level difference that the whole class can read during demonstrations of gas supply pressure, breath pressure or pressure below a liquid surface.
For a steady reading, clamp the tube upright on a retort stand, tint the water with a few drops of food colouring, and connect the source with a short length of rubber tubing. Borosilicate laboratory glassware is chosen for its resistance to common laboratory chemicals and repeated washing; rinse the tube after each session and store it with the long arm supported so it cannot be knocked or bent under its own weight.
Manufacturer
This tube is produced by Jain Scientific Equipments Private Limited, which trades as ScienceLab and is based in Ambala, Haryana, India. The company makes laboratory glassware and teaching apparatus for educational institutions and distributors; read more on the company profile page.
Related Laboratory Equipment
Items usually set up alongside an open manometer for pressure demonstrations:
- Manometer, Glass — a complete glass manometer for physics pressure measurement
- U Tube Manometer — an alternative U-tube design for comparing two pressures
- Rubber Tube (Laboratory) — flexible tubing to connect the manometer to the source under test
- Retort Stand — holds the long arm vertical so levels are read correctly
- Food Colouring Blue — tints the water so the liquid levels stand out
See the complete Chemistry Lab Equipment range for more glassware, clamps and supports.
Frequently Asked Questions
What exactly is supplied under this listing?
The borosilicate manometer tube with a 50 cm (19.7 in) arm and funnel top, described as the replacement tube for the Open Manometer. A stand, scale and tubing are not listed as included, so please contact us to confirm the scope of supply before ordering.
Can it replace a broken tube on a manometer we already own?
That is its intended purpose. Whether it fits your existing board or clamps depends on your current mounting, so share its dimensions or a photo with us and we will advise.
Which liquid should be used inside?
Coloured water is the usual choice for school demonstrations because it is safe and easy to see. If your experiment needs a different manometric liquid, discuss it with your laboratory in-charge and with us before use.
How should the tube be cleaned?
Rinse it with clean water after every use. For stubborn residue, use a mild laboratory detergent, rinse thoroughly and let it drain dry in an upright position.
Is a calibration certificate available?
This is a direct-reading teaching item. If your institution needs any documentation, including calibration certificate availability, please raise it with us at the enquiry stage.
Do you supply schools in bulk or overseas?
Yes. ScienceLab supplies schools, colleges and distributors across India and international markets; tell us the quantity and delivery location for a quotation.
What warranty applies?
Warranty terms are confirmed with each quotation — contact us for current terms.
Request a Quote
To receive pricing for the Open Manometer, contact us with the quantity you need, or add it to your enquiry cart together with other laboratory items.
Last updated: 24 September 2026
