Safety Tubes with Bubble
Product Code : SCL-CL-11488
Safety Tubes with Bubble (SKU SCL-CL-11488) are 350 mm safety funnel tubes with a 40 mm upper opening and a bulb (the “bubble”) along the stem. Fitted through the stopper of a gas-generating flask, the tube lets acid be poured in while the liquid held in the bulb helps keep the gas from escaping back up. Science Lab Supplies supplies the tube from Ambala, India for school and college chemistry labs, training institutes, distributors and tender buyers.
Specifications
The tube is 350 mm long, long enough to reach from above the stopper to near the bottom of a flask. It opens at the top into a 40 mm funnel for pouring, and the stem carries one bulb, which traps a little liquid to act as a seal during gas generation.
| Parameter | Value |
|---|---|
| SKU | SCL-CL-11488 |
| Type | Safety tube with bulb (bubble) |
| Bulbs | 1 |
| Upper diameter | 40 mm |
| Length | 350 mm |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for Safety Tubes with Bubble
The safety tube is the acid inlet of a simple gas generator. With its stem dipping below the liquid in the flask, acid added through the funnel reaches the solid, while gas leaves by a separate delivery tube instead of escaping through the funnel. The bulb gives extra protection against liquid being forced back.
- Class 10 science: preparing hydrogen from zinc granules and dilute acid.
- Class 10–11 chemistry: preparing carbon dioxide from marble chips and dilute hydrochloric acid.
- Class 11–12: gas preparation with collection over water or by displacement of air.
- College and teacher-training labs: demonstrating the parts of a gas generator.
Acids are corrosive: add them slowly through the funnel, wear eye protection and keep flames away from hydrogen. Gas preparation should always be supervised.
Standard Scope of Supply
The Safety Tubes with Bubble are supplied as single tubes as described above. The flask, bored stopper, delivery tube and chemicals are not included; any of them can be added to the same quotation.
Packing, MOQ and Lead Time
Quotations cover anything from one safety tube to enough for every gas-preparation bench in a school. Each lists the packing, delivery time and price for your quantity, and the flasks and stoppers you need can be priced alongside by the same laboratory glassware supplier in India.
Science Lab Supplies holds an Importer-Exporter Code as a registered exporter, so it can ship to buyers in Tanzania, Uganda, the UAE, Saudi Arabia, Oman and the Philippines. Science Lab Supplies is registered for GST (GSTIN 06ADEPJ0574F2ZU). For a price, add the tube to the enquiry cart or write via the contact page; the lab tender page explains tender quotations.
Frequently Asked Questions
What is the bulb on the safety tube for?
It holds a small amount of liquid that acts as a seal, so gas cannot easily escape up the tube and liquid is less likely to be pushed out of the funnel.
How is the tube fitted to a flask?
Pass it through one hole of a two-hole rubber stopper so the stem ends below the liquid level; the second hole takes the gas delivery tube.
Who supplies the Safety Tubes with Bubble?
Science Lab Supplies supplies them from Ambala, India to schools, colleges, training institutes and distributors, including tender quantities.
What are the dimensions?
The tube is 350 mm long with a 40 mm upper diameter and one bulb on the stem.
Related Gas-Preparation Apparatus
A safety tube is one part of a gas generator. A bored stopper holds it in the flask, a gas-collection set receives the product, and a Kipp’s apparatus offers a ready-made alternative for regular use. These four Chemistry Lab items can be quoted with it.
- Rubber Stoppers of Various Diameters with Holes — seats the tube and delivery tube.
- Flat-Bottomed Flasks 100ml — a stable generator flask.
- Simple Equipment for Gases that do not Dissolve in Water — for collecting the gas.
- Kipps Apparatus — gas generation on demand.
Browse the full Chemistry Lab range or all school lab equipment.
Last updated: 25 September 2026
