The IEC Surface Plate is a flat plate with 3x small pads designed to rest on the work bench and to carry and seal to a bell jar or similar vessel.Often used for demonstrating a bell in avacuum or any other experiment where a vacuum must be created.A flat slab of acetyl material is machined flat and smooth to become an excellent sealing surface.A tube enters from the edge of the plate and exits from the centre of the plate.Normally a vacuum pump connects to the tube and the central tube evacuates under the glass bell jar which is sealed to the flat surface with the assistance of a smear of vaseline.The tube is fitted with a sliding valve that permits the controlled entry of air into the vacuum space.When slid inwards,the vacuum space is vented and when slid outwards,the valve seals.

Size: 200 x 25mm (DxH)