Callendar and Barne's Apparatus (Continuous Flow)
Product Code : LSK-H-11160
Callendar and Barne's Apparatus (Continuous Flow) (SKU LSK-H-11160) measures the specific heat capacity of water by the continuous flow method: water runs at a steady rate through a glass tube past an electric heating coil, and its temperature rise is recorded. It is a B.Sc. and engineering heat practical. Science Lab Supplies manufactures the apparatus in Saha, Ambala, India, at Plot 448 of the HSIIDC Industrial Area, and quotes it directly to colleges, schools, tender contractors and distributors.
Specifications
Here, row by row, are the construction details of the continuous-flow calorimeter. Briefly, a borosilicate glass tube open at both ends contains a nichrome coil about 40 cm long, the detachable element sits in a felt-lined wooden case with a hinged cover, and a brass constant level tank on a stand feeds the water.
| Specification | Value |
|---|---|
| SKU | LSK-H-11160 |
| Flow tube | Borosilicate glass, open at both ends |
| Heating element | Coil of nichrome wire |
| Coil length | About 40 cm |
| Coil winding | Spiral, along the axis inside the glass tube |
| Element mounting | Easily detachable |
| Housing | Wooden case lined with felt |
| Cover | Hinged |
| Electrical leads | Carried to terminals |
| Water supply | Constant level tank of brass, fitted on a stand |
| Metal pots | Two, of thick brass sheet |
| Sealing | Leak proof when fitted |
| Thermometers | Not included |
| Meters | Not included |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Callendar and Barnes Apparatus
Students set a steady water flow from the constant level tank, pass a measured current through the coil and read the inlet and outlet temperatures once they stop changing. Repeating the run at a second flow rate cancels heat losses, giving the specific heat capacity of water by a classic continuous-flow method.
- B.Sc. physics practical: specific heat capacity of water by Callendar and Barnes' method, with heater current on an Ammeter and voltage on a Voltmeter.
- Engineering physics and diploma heat labs: steady-state flow calorimetry and the elimination of heat losses with two flow rates.
- Reading inlet and outlet water temperatures on a non-mercury Glass Thermometer ranging -10 to +110 °C.
Keep water flowing whenever the coil is energised, and switch off the supply before detaching the element.
Standard Scope of Supply
The apparatus comes with the borosilicate glass flow tube and its nichrome heating element in the felt-lined wooden case with hinged cover, the leads taken to terminals, the brass constant level tank fitted on its stand and the two thick brass-sheet pots. Thermometers and meters are not included.
Packing, MOQ and Lead Time
One apparatus for a demonstration or several for a full degree-level heat lab can be quoted, and each quotation sets out packing, delivery time and price for that quantity. Meters and thermometers needed for the experiment can be added to the same quotation.
Science Lab Supplies is a registered exporter with an Importer-Exporter Code and can ship to buyers in the UAE, Saudi Arabia, Oman, the Philippines, Nepal and Bangladesh. The business is registered under Udyam as a manufacturing enterprise (UDYAM-HR-01-0014546) and for GST (GSTIN 06ADEPJ0574F2ZU). For a price, message the team via the contact page, save the item to the enquiry cart, or follow the lab tender page for formal tenders.
Frequently Asked Questions
What does the continuous flow method measure?
It measures the specific heat capacity of a liquid, usually water. Electrical energy supplied to the coil is compared with the heat carried away by water flowing at a steady rate, and a second run at a different flow rate removes the heat-loss term.
Are thermometers and meters supplied with the apparatus?
No. It is supplied without thermometers or meters. Your laboratory can use its own ammeter, voltmeter and thermometers, or ask for them to be priced on the same quotation as the apparatus.
How is a steady water flow obtained?
The apparatus is complete with a brass constant level tank fitted on a stand. It keeps the water head constant, so the flow through the glass tube stays steady while temperatures are recorded.
Is Science Lab Supplies the manufacturer or a trader?
Science Lab Supplies makes this apparatus itself, at its own works in the HSIIDC Industrial Area of Saha, Ambala. Quotations are prepared there too, so there is no intermediary between the buyer and the production floor.
Related Specific Heat and Heat Flow Apparatus
The items below cover steady water supply, calorimetry, energy measurement and other heat-equivalent methods that sit naturally alongside a continuous-flow experiment in a degree-level college heat lab, and any of them can be combined with this apparatus on a single quotation.
- Constant Level Tank — copper vessel whose level cannot rise above a central overflow tube.
- Joule's Calorimeter — also offered with copper calorimeters of customised sizes or without the wooden vessel.
- Searle's Thermal Conductivity Apparatus — copper rod cooled at one end by water flowing through a spiral tube.
- Joule's Mechanical Heat Experiment Apparatus — fixed and rotating vanes in a felt-lined wooden case, with two sets of slotted weights.
- Student Digital Joulemeter — measures 1 to 999,999 joules with a built-in timer.
- Calorimetry — calorimeters with nickel-coated insides, plus a rheostat and a digital stopwatch.
- Digital Stopwatch — 24-hour timer reading to 1/100 second, with alarm.
Browse the full Heat range, the Lab Meters range for the ammeters and voltmeters this method needs, or all physics lab equipment.
Last updated: 9 October 2026