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Heat & Light
Gravesande’s Ball and Ring Apparatus, Brass Set
$39.90(Ex GST)
$39.90(Ex GST)
- Brass bar and gauge set for thermal expansion and contraction demonstrations in heat practicals.
- Heating bar increases length and diameter, bar no longer fits gauge for clear visual proof.
- Chilling gauge in ice contracts opening, bar cannot pass, compares cooling versus heating effects.
- Insulating handle improves safe handling during heating and transfer between burner, ice bath, bench.
- Precision machined and size matched parts for reliable fit at reference condition, repeatable results.
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- Description
Description
This brass Gravesande’s ball and ring apparatus is a classic heat demonstration for showing thermal expansion and contraction of metals. The ball and ring are carefully machined and size-matched so the fit is correct at the reference condition, which helps the experiment work reliably in classroom use.
In operation, the ball passes through the ring at the matched condition. If the ring is chilled in ice, the ring contracts and the ball cannot pass through. If the ball is heated, it expands and also cannot pass through the ring. A chain links the ball to the ring to keep the parts together during handling, storage, and repeated demonstrations.
FAQs
Q: What concept does this apparatus demonstrate?
A: Thermal expansion and contraction of metal due to heating and cooling.
Q: What happens when the ring is chilled?
A: The ring contracts and the ball cannot pass through.
Q: What happens when the ball is heated?
A: The ball expands and cannot pass through the ring.
Q: Why are the ball and ring size-matched?
A: Correct matching is required for consistent results in the demonstration.
Q: Why is there a chain?
A: It keeps the ball and ring together so they do not become separated
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What Our Customers Say
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We ordered a set of customised BORO 3.3 borosilicate glassware for our teaching labs, and LabChoice Australia exceeded every expectation. From the first consultation to final delivery, their team listened carefully, offered expert advice, and ensured every piece matched our specifications perfectly.
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Our lab required high-precision BORO 3.3 glassware for analytical testing, and LabChoice Australia delivered outstanding results. The ordering process was simple, communication was clear, and every beaker and flask arrived perfectly calibrated and ready for use.
The quality of the glass is exceptional — resistant to heat, easy to clean, and consistently accurate in measurement. It’s reassuring to know there’s an Australian supplier that combines scientific precision with genuine customer care. I’d recommend LabChoice to any research team looking for dependable labware
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We needed a set of customised borosilicate glassware for a specialised project, and LabChoice Australia delivered exactly what we envisioned. The team worked closely with us from design to production, ensuring every detail met our specifications. The craftsmanship is exceptional, and the turnaround time was impressive. It’s reassuring to know we can rely on them for unique, made-to-order pieces
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LabChoice Australia has completely changed the way we source our lab glassware. The quality is consistently top-notch, and every piece meets the precision we need for reliable results. Their team knows their stuff, answers our questions quickly, and always goes the extra mile to help — they’re more like partners than just a supplier.
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We trust LabChoice Australia because they deliver every time. Their borosilicate glassware is durable, accurate, and perfect for the high-heat work we do. Everything arrives well-packed with clear specs, so there are never surprises. It’s reassuring to deal with a supplier who understands both compliance and the demands of a busy lab
