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Extraction & Distillation Apparatus
Respiration Apparatus with Two Boiling Tubes, BORO 3.3 Glass
$199.90(Ex GST)
$199.90(Ex GST)
- Designed for comparing inhaled and exhaled air in biology experiments
- Includes two glass boiling tubes for separate airflow pathways
- Each tube is fitted with a two-hole rubber stopper
- Supplied with one short and one long 5 mm glass delivery tube per side
- PVC tubing connects both tubes to a central plastic T-piece
- Suitable for use with an appropriate carbon dioxide indicator solution
- Ideal for school biology, respiration and gas-exchange demonstrations
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- Description
Description
Respiration Apparatus with Two Boiling Tubes, also known as an inhaled and exhaled air comparison apparatus, is designed for educational biology experiments that investigate differences between inspired and expired air. It provides students with a simple visual method for demonstrating that exhaled breath contains a higher concentration of carbon dioxide than inhaled atmospheric air.
The apparatus comprises two glass boiling tubes, each fitted with a two-hole rubber stopper. One short and one long 5 mm glass delivery tube pass through each stopper to create separate inlet and outlet pathways. Flexible PVC tubing connects the two sides to a central plastic T-piece, allowing inhaled and exhaled air to be directed through different boiling tubes.
For a typical experiment, each boiling tube is partially filled with a suitable carbon dioxide indicator, such as limewater or hydrogen carbonate indicator. The longer glass tube extends below the liquid level so that air bubbles through the solution, while the shorter tube remains above the liquid to complete the airflow pathway.
As the user breathes through the connected mouthpiece arrangement, atmospheric air passes through one indicator solution and exhaled air passes through the other. The solution exposed to exhaled breath generally changes more quickly because expired air contains more carbon dioxide. This enables students to compare the composition of inhaled and exhaled air through a clear and observable reaction.
This apparatus supports practical lessons covering human respiration, breathing, gas exchange, cellular respiration and carbon dioxide production. It is suitable for secondary school science laboratories, colleges, universities and introductory biology teaching environments where students require a straightforward demonstration of respiratory gas exchange.
For safe and hygienic classroom use, each participant should use a clean or disposable mouthpiece. The boiling tubes must not be overfilled, and users should never inhale indicator solution through the apparatus. All glass components should be handled carefully, cleaned after use and inspected for damage before each experiment.
Available from LabChoice Australia, the Respiration Apparatus with Two Boiling Tubes provides a practical and visually effective resource for biology education. It is well suited to Australian schools, universities and science teaching laboratories requiring reliable equipment for inhaled and exhaled air comparison experiments.
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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.
The clarity and precision of the glassware are exceptional, and the quick turnaround made setup effortless. It’s refreshing to work with an Australian supplier who genuinely understands laboratory needs and takes pride in quality craftsmanship. We’ll definitely be returning to LabChoice for future glassware requirements
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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
