Heat Measuring Instruments

For preventing condensed water being carried over with Steam Trap prepared in a laboratory steam generator. Particularly useful when determining the heat of vaporization with a steam calorimeter. Consists of a borosilicate glass chamber with a curved inner tube to prevent drops of condensed steam from escaping, as well as a drainage tube.

For demonstrating the different heat conductivity of five metals by observing the melting of wax.

Consists of Five Rod Form Conductometer (I x d), 75 x 5mm of aluminum, brass, iron, copper, and stainless steel which are radially fi tted on a brass disk of about 27mm diameter. Each of these Five Rod Form Conductometer have a cavity at the outer end for holding paraffin wax. The central disk is joined to an insulated handle by 125mm long plated steel rod. Overall length about 32cm.

For demonstrating the phenomenon of thermal convection in Liquid Convection Apparatus caused by temperature variation. Consists of a rectangular shaped borosilicate glass tube (w x h), 15 x 21cm with a funnel shaped opening at the top for filling liquids. When this tube is partially filled with water and heated at one corner after adding a dye or potassium permanganate crystals or saw dust or aluminum powder, the movement of colors or particles illustrates the formation of convection currents.

For demonstrating the phenomenon of convection in air and the principle of room ventilation. Consists of an enamelled metal box (I x w x h), 20 x 10 x 10cm, having a sliding glass door and two glass chimneys. When a candle in a socket is placed under one chimney and a smouldering tape or touce paper is placed underneath the other chimney, the fl ow pattern of smoke dramatically illustrates the formation of convection currents. Supplied with two Candles. Tape or touce paper are not supplied.

Stainless steel tank 20 x 8 x 8cm, with 3mm rods of different materials, viz., aluminum, brass, copper, iron and glass embedded through a rubber stopper. Each rod has provision for placing a small portion of wax.

For demonstrating the expansion or contraction of metals. Consists of two brass rods with insulated handles. One of the rods has a ring and the other one has a ball of approximate diameter 25mm, attached at the end. The brass ball passes through the ring when both are at room temperature, but when the ball is heated it expands and can not pass through the ring.

For demonstrating the expansion by heating and contraction by cooling. The gauge just about fi ts over the bar at room temperature, while it does not when heated. The gauge also has a hole which just accepts the bar end.

To demonstrate unequal expansion in different metals on heating. Highlights the role of temperature and materials in practical applications such as in thermostats. Consists of a laminated strip of two different metals fitted in a wooden handle. The strip is about (I x w), 200 x 8mm. Due to differences in the co-efficient of linear expansion of both metals, the laminated strip bends dramatically on heating.

For determining specific heat, heat of fusion and heat of vaporization consists of two polished spun aluminium vessels, I. E. An inner calorimeter (h x d), 80 x 65mm and an outer calorimeter (h x d), 140 x 100mm. Includes a plastic ring for seating the inner calorimeter, a stirrer, and a plastic lid for outer vessel. The lid has two holes for the thermometer and the stirrer. Supplied without the thermometer.

Inner copper vessel 75x50mm, with a recessed plastic lid, with hole for a thermometer and carrying a heating coil. Connection to the 3-4V DC power supply is via 4mm socket terminals. The outer aluminum vessel is 100x60mm. With stirrer. Supplied without the thermometer.

For determining the mechanical equivalent of heat by measuring the heat generated in an electrical resistance. Includes the calorimeter set of two described above. The plastic lid is with a heating coil to work with 6V supply or a battery, two 4mm socket binding posts for electrical connections, stirrer with an insulated handle and a single- hole rubber stopper for inserting a thermometer. Supplied without the thermometer. Requires a suitable voltmeter, ammeter, and thermometer (not supplied).

For determining the melting point of solid substances. (upper limit 250ºC) Consists of an aluminium cylinder (I x d), 50 x 63mm with a slanted hole of diameter 7mm on the top for inserting a thermometer. Can be heated on a burner. The substance to be melted is placed on the top of the cylinder. Melting point is noted when melting occurs.

For showing that when different metal cylinders are heated to the same temperature and immersed individually in an equal quantity of water, the rise in temperature of the water is directly proportional to the specific heat of the chosen metal cylinder. Individual cylinders can also be used for precise specific heat determination. Includes six cylinders made of aluminium, brass, copper, iron, lead, and zinc having diameters of 12.5mm. The length of each cylinder is adjusted so that all of them have the same mass.

Determine specific heats of five different metals. Use with a calorimeter to determine various specific heats of metal cylinders. Includes specification sheet. Set consists of aluminum, copper, zinc, tin,iron and lead cylinders. All the cylinders have the same mass (58g) and diameter (19mm). Accuracy is maintained by suspending the cylinder from a string rather than from a hook of a different metal;string is attached at the small, grooved knob.

To demonstrate the effect of thermal radiations on different type of radiations. The sides of the cube are painted dull black, bright black, white and bright tin. Each side is 125mm.

Not all colors are created equal. Investigate how color can infl uence
absorbing and radiating energy.


How to use: Exploring radiation and absorption.


1. Place black and silver containers near each other with thermometers inserted in each.
2. Angle a lamp so the light points directly at the sides of both containers.
3. Read off temperatures of each, with the light on, then off. Observe and record 10 minutes.

The cans are fi nished with black, white, and silver exteriors, so students can easily determine the effect of surface color on heat transfer. Set of three 500mL cans with stoppers to accommodate thermometer. Supplied without thermometer.

To show that water has a maximum density at 4ºC. Consists of a sheet metal cylinder, with two tubes in the upper and lower regions for inserting thermometers through rubber stoppers. Mounted on a base and encircled midway by an outer trough for holding a mixture of ice and salt. Temperature of the water is measured at the top and bottom of the inner cylindrical vessel over a period as the water cools. Supplied without the thermometer.

Excellent demonstration Crookes Radiometer tools of the effects of heat and the conversion of solar power to mechanical power. Consists of a set of vanes each shiny on one side to reflect the light and blackened on the other to collect the energy. It is mounted in an evacuated glass bulb. When exposed to the sun or source of intense light it causes the vanes to spin.

Comprising strips of copper, iron, aluminium and brass fixed on wooden frame meeting in the centre, outer ends of the strips formed with small cups to hold wax.

Ideal for younger students. Economically and accurately determines the coefficient of expansion of various metals. Has an easy to read scale, calibrated in millimeters and supplied with three different expansion rods. It shows heat expansion and cold contraction. Uses spirit burners or tea light candles (not included)

For experiments on specific heat capacity. These Cylindrical blocks have two holes, one for the immersion heater and one to take a thermometer. Mass of each block is about 1Kg + 2%

For demonstrating the expansion of water on freezing. Consists of a cast iron bottle approximate 90x20mm with screw cap.