20th Century Electronics Standard Leak
This is a Standard Leak. It is basically a glass chamber containing helium that 'leaks' the helium through a membrane at a known rate. It is used for callibrating purposes for example in mass spectrometers.
The markngs on the label are:
Serial no. 147
Donated by Bill Hall
This file was last modified
14:43:54, Tuesday September 02, 2014