Hand Pump with Vacuum Plate

Efficient combination of a pump and a vacuum plate.

• Plate features a silicon seal, which allows perfect sealing of the bell jar with the plate
• 20 cm diameter size

Just a few strokes of the pump are enough to establish a vacuum in a bell jar, so students can observe the reducing sound level of the bell. The plate can also be used with electric vacuum pumps with the help of a three-way stopcock under the plate.