Page 191 - Demo

“Your Safer Source for Science”
Pumps, Vacuum, Accessories
189
Pumps, Vacuum, Accessories, continued
Bell Jars
High quality, flint glass bell jars. Glass is crystal clear, allowing students to easily view experiments performed inside the jar. Bell jars with a ground glass stopper offer the flexibility for evacuation or for pressurizing the inside of the jar using an external air source/pump. The nickel­plated vacuum plate (AP8618) works well with both the large and small bell jars. The polycarbonate plastic plate (AP1869) may be used with the large bell jars. Dimensions of small bell jars: 6" o.d. x 10" tall. Dimensions of large bell jars: 10" o.d. x 16" tall.
See free How To Boil Water in a Bell Jar video at flinnsci.com.
Bell Jar, Plastic
An easy­to­use, lightweight bell jar. The jar is transparent amber. It inverts on top of a vacuum base plate. The jar seals against a neoprene gasket in the AP1869 vacuum plate (see below).
Made of polyetherimide (PEI). PEI has good to excellent chemical resistance to acids, bases, aliphatic alcohols and hydrocarbons, and saturated, halogenated hydrocarbons.
Demonstration Bell
This large demonstration bell is perfect for many topics in physical science. Use it to test simple electric circuits, to teach about electro­ magnetism, or to show students how the components of a bell work together. Place the bell inside a large bell jar and evacuate it—students will see the bell moving, but no sound will be heard! Banana plug jacks make for easy connections. Operates on a 6­volt battery. Bell assembly is 18 x 9 x 4.5 cm and includes a 9 x 9 x 2.5 cm polished wood base.
Stopcock Grease See page 208. Vacuum Chamber with Plate
Save money! Purchase a complete vacuum chamber system. Safe polycarbonate bell jar is 6" in diameter, stands 9" tall and has excel­ lent chemical resistance. Clear plastic allows for easy observation of air pressure effects. Vacuum plate is also polycarbonate plastic with an outside diameter of 71⁄2". The side­mounted tubing adapter accepts 1⁄4" i.d. vacuum tubing (AP8789). For use with (AP1712 or AP1597) vacuum pumps.
Vacuum Plate
White polycarbonate plastic, 131⁄2" in diameter. Supplied with thick gasket to accept either glass or plastic bell jars. A tubing adapter that accepts 1⁄4" i.d. vacuum tubing is located on the outside rim of the vacuum plate.
Bell Jar, Glass, Closed, with Molded Knob AP1870 AP6655
Catalog No.
Description
Capacity
Price/Each
AP6655
Small Bell Jar with Molded Knob, Glass
3.5 L
$106.00
AP6656
Small Bell Jar with Ground Glass Stopper, Glass
3.5 L
149.50
AP1870
Bell Jar with Molded Glass Knob, Glass
13 L
262.90
AP1871
Bell Jar with Ground Glass Stopper, Glass
13 L
300.55
Bell Jar, Glass, Hole in Top AP1871
AP6656
Bell Jar, Plastic AP1867, etc.
Catalog No.
Description
Size Diam. x Height
Capacity
Price/Each
AP1867
Bell Jar, Plastic
83⁄4 x 10"
8.3 L
$393.25
AP1868
12 x 12"
18.9 L
744.30
Catalog No.
Description
Price/Each
AP7105
Demonstration Bell
$20.65
Vacuum Chamber with Plate AP4506
Demonstration Bell AP7105
Catalog No.
Description
Price/Each
AP4506
Vacuum Chamber with Plate
$209.20
Vacuum Plate AP1869
Catalog No.
Description
Price/Each
AP1869
Vacuum Plate
$117.25
PUMPS, VACUUM, ACCESSORIES continued on next page.