LINEAR EXPANSION APPARATUS ( ECONOMY)

Item 6454-87

$25.07

LIQUID EXPANSION BULB

Item 3256-00

$2.40

This apparatus consists of 2 brass rods with insulated handles. One of the rods has a ring and the other has a ball of approximate diameter 1″ (25 mm), 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 cannot pass through the ring, demonstrating the expansion and contraction of metals.
• Comes with a Teacher’s Guide

Item 3226-00

$8.13

Use this bar to demonstrate unequal expansion in different metals on heating. It consists of a laminated strip of 2 different metals fitted in a plastic handle. Due to differences in the coefficients of linear expansion of both metals, the laminated strip bends dramatically on heating.
• Comes with a Teacher’s Guide
• Strip is approx. 8″ (200 mm) L x 0.38″ (10 mm) W

Item 3230-00

$3.44

Use this device to demonstrate the phenomenon of thermal convection in liquids caused by temperature variation. It consists of a rectangular-shaped borosilicate glass tube, 6″ (150 mm) W x 8.25″ (150 mm) H, with a funnel-shaped opening at the top for filling liquids. When this tube is filled with water and heated at 1 corner after adding a dye, potassium permanganate crystals, saw dust, or aluminum powder, the movement of colors or particles illustrates the formation of convection currents.
• Comes with a Teacher’s Guide and reproducible Student Handout

Item 3205-00

$7.75

• Teacher's Guide Included
• Handout Included

This item is also known as a Convection Box or a Ventilation Apparatus. Use it for demonstrating the phenomenon of convection in air and the principle of room ventilation. It consists of an enameled metal box 4″ (100 mm) W x 8″ (200 mm) L x 4″ (100 mm) H, having a sliding glass door and 2 glass chimneys. When the included tea light candle is placed under 1 chimney and a smoldering tape or parchment paper is placed underneath the other chimney, the flow pattern of smoke dramatically illustrates the formation of convection currents. Tape or parchment paper are not supplied.
• Comes with a Teacher’s Guide and reproducible Student Handout
Includes:
• 2 candles

Item 3210-01

$18.63

• Teacher's Guide Included
• Handout Included

This product is comprised of a tinplate box with 3″ (75 mm) sides; the vertical faces of the box are blackened, roughened, varnished, and polished, respectively. The top opening is 1″ (25 mm) Dia. The apparatus is filled with water maintained at boiling point by a low Bunsen flame. A thermopile and a galvanometer can then be used to compare the relative output of radiant heat from each of the 4 faces. Care should be exercised to prevent radiation from reaching the thermopile directly from the flame.
• Comes with a Teacher’s Guide
Includes:
• Rubber stopper
• Alcohol thermometer

Item 3030-11

$17.50

This explosive demonstration is great for discussing adiabatic compression (rapid compression that raises air temperature) in diesel engines, Ideal Gas Laws, the laws of thermodynamics, and the resourcefulness of ancient people. As air compresses, the temperature increases and combustible material bursts into flames. It’s a simple experiment that students are sure to remember!
• Comes with a Teacher’s Guide and reproducible Student Handout
Includes:
• Cotton
• 2 extra butadiene-acrylonitrile rubber O-rings

Item 1522-00

$11.07

• Teacher's Guide Included
• Handout Included
• Video Available

This is a classic example of thermodynamics in action! The heat of your hand warms the bottom bubble, causing the air in the Hand Boiler to expand. Liquid is forced into the top bubble, making it appear to boil for an exciting demonstration!
• Comes with a Teacher’s Guide
• Glass construction with 2 bulbs connected by a spiral tube
• Assorted colors

Item 2010-10

$2.84

• Video Available

This is a classic example of thermodynamics in action! The heat of your hand warms 1 bulb, causing the air in the hand boiler to expand. Liquid is forced into the other bulb, making it appear to boil for an exciting demonstration!
• Comes with a Teacher’s Guide
• Glass construction with 2 side by side bulbs connected by a straight tube

Item 2010-20

$5.40

• Video Available

The Galileo thermometer consists of a sealed glass tube that is filled with water and several floating bubbles. The bubbles are glass spheres filled with a colored liquid. Attached to each bubble is a little metal tag that indicates the temperature (Fahrenheit) – a beautiful way to demonstrate pressure and fluid principles!
• Comes with a Teacher’s Guide
• Approx. 13″ (330 mm) H

Item 1167-00

$13.07

• Video Available

Use this thermometer for classroom or outdoor use. It is a spirit-filled glass thermometer mounted on a rustproof aluminum plate. The thermometer has a dual scale: -30° to 230°F x 1°F and -30° to 110°C x 1°C division.
• Approx. 6.5″ (165 mm) L x 1″ (25 mm) W. Please note this thermometer is not resistant to chemicals.

Item 1202-01

$1.20

Use this thermometer for classroom or outdoor use. It is a spirit-filled glass thermometer mounted on a rust-proof v-back aluminum plate. The thermometer has a dual scale: -30° to 110°C and -20° to 230°F.

Item 1203-11

$0.85

• Best Seller

This thermometer is for classroom or outdoor use. It is a spirit-filled wall thermometer with a plastic back and dual scale -20°F to 120°F x 1°F and -30°C to 50°C x 1°C division. Boiling, freezing, room, and normal body temperatures are marked on the scale. • 6.5″ L x 2″ W

Item 1203-12

$1.99

This Digital Instant Read Thermometer has a large viewing display (24 mm x 11 mm) for clear viewing. It is designed in a convenient pen style with a protective sheath. Simple and quick to use, it is a fantastic staple for laboratories.
• On/off and F’/C’ switches
• Scale -50-392°F/-45-200°C
• Uses 1 x 1.5 v LR44 battery

Item 1230-00

$17.47