VACUUM PUMP: Metal plate, Rotary electric | Perfect for scientific demonstration

VACUUM PUMP: with accessories

Vacuum pump metal connector, plate, Oil (250ml) and rotary electric for use in the science laboratory.

Wikipedia excerpt: ..."A vacuum pump is a type of pump device that draws gas particles from a sealed volume in order to leave behind a partial vacuum. The first vacuum pump was invented in 1650 by Otto von Guericke, and was preceded by the suction pump, which dates to antiquity.[1]...

Pumps can be broadly categorized according to three techniques: positive displacement, momentum transfer, and entrapment.[14][15][16] Positive displacement pumps use a mechanism to repeatedly expand a cavity, allow gases to flow in from the chamber, seal off the cavity, and exhaust it to the atmosphere. Momentum transfer pumps, also called molecular pumps, use high-speed jets of dense fluid or high-speed rotating blades to knock gas molecules out of the chamber. Entrapment pumps capture gases in a solid or adsorbed state; this includes cryopumps, getters, and ion pumps.[14][15]

Positive displacement pumps are the most effective for low vacuums. Momentum transfer pumps, in conjunction with one or two positive displacement pumps, are the most common configuration used to achieve high vacuums. In this configuration the positive displacement pump serves two purposes....")