An improved version of the classic Bell in a Jar experiment. The base is fitted with a rubber sheet which ensures a good seal between the jar and pump plate, without the need for vacuum grease.
The pump plate is lightweight aluminium, mounted on a heavy tripod base, with a tube connection to the central pillar to evacuate air from the bell jar on top. A stopcock allows the chamber to be sealed, allowing the vacuum to be kept when turning off the pump.
The bell jar is robust acrylic which is safe in the event of implosion, and has a flat flange to ensure a good seal with the pump plate. The bell is suspended by wires to reduce conduction of sound to the bell jar. Connection is by 4 mm sockets on the top bung.
The bell can be heard getting quieter as the air is evacuated. Then, by closing the tap, turning off and disconnecting the pump, and then slowly allowing the air back in, the bell can be heard getting louder, as air is required to conduct the sound.
The high-quality bell operates on 4-6 V DC or AC. Requires a suitable vacuum pump, and heavy-walled vacuum/pressure tubing.
• Height 260 mm to neck
• Internal diameter 140 mm
• External diameter flange 180 mm
• Height 195 mm
• Diameter 250 mm
Upon receipt of your enquiry, we will prepare a fully priced quotation which will include freight charges directly to your school or a nominated point of delivery.
Certain chemicals are subject to special carriage requirements and certain living products, such as drosophila, will also incur a carriage surcharge. Please contact our customer service team for further clarification when processing your quotation.
In order to keep freight costs to a minimum we always endeavour to ship your science equipment in one single cost-effective consignment and provide you with dispatch details accordingly.