Description:
• Comprising a brass ball 25 mm dia, a brass ring mounted on a rod with a wooden handle, a chain is provided to hold the ball with the ring. The ball passes through the ring when cold but will not pass through after being heated.

Description:
• As above, but the ring & the ball with separate handles.

Description:
• An apparatus for demonstrating thermal expansion, comprising a captive brass ball 22 mm. dia. with ring adjustably mounted on a tripod base.

Description:
• To illustrate expansion of metal on heating and contraction on cooling.
• With steel bar of length 100 x 10 mm and plated brass gauge.
• With a cut-out to just accommodate the bar and two holes through which the bar passes when cold.
Product Code :- CLM/PHY/H-04

Description:
• To show the forces which can be exerted during thermal expansion or contraction.
• Comprising a heavy cast iron frame 340 x 120 x 100 mm. with slotted end pillars to carry a stout iron bar.
• The bar is threaded at one end for a large tensioning nut and has holes at the other end to accommodate the cast iron breaking bars.
• Supplied complete with ten breaking bars.

Description:
• This single piece non-jointed bimetallic strip.
• Represents a commercial available stip.
• The metals are distinct and visible.
• An improved version of the rivetted form.
• Metals are copper and steel.
Product Code :- CLM/PHY/H-06

Description:
• Students can easily apply the effect of temperature change on a bi-metal strip with this kit which consist of a class set of 10 bi-metal strips measuring 100 x 8 x 0.5 mm. Securely attached to wooden support, 50 x 35 x 12 mm. The device can be held in a standard laboratory clamp and with a few leads, battery or power supply, buzzer (260 - 144) and some crocodile clips students can invent a fire alarm while revising simple circuit work. The apparatus can form the basis of many other design projects such as thermostats or investigations into expansion.
Product Code :- CLM/PHY/H-07

Description:
• With two cast end pieces jointed by three nickel plated rods which carry two sliding V supports for a glass jacket with inlet and outlet tubes. One end piece fitted with spherometer reading to 0.005 mm, and the other with contact screw. The Glass jacket enclosed both a brass and a copper rod each 500 x 6 mm, length x diameter, fitted through corks, a half turn of the jacket changing the rod in contact with the spherometer. A thermometer can be attached to either of the rods by rubber bands. Brass terminals are fitted to the apparatus so that an electrical circuit can be made through either rod to indicate the movement of contact of centre tube and spherometer. Overall dimensions 600 x 125 x 150 mm.
Product Code :- CLM/PHY/H-08

Description:
 • For demonstrating the differential expansion of two metals as shown by the curvature produced when the bar is heated. Comprising a bar of copper and iron, Brass and Steel each 200 x 15 mm, riveted together.