Purge and bridge tubes for analytical cells

The bridge tubes allow to prevent the reference electrode from being contaminated by the electrolyte. Purge tubes are used to control the gas concentration in and above your electrolyte.

Bridge tubes are used to avoid direct contact of the reference electrode with the electrolyte. Also it ensures a very short distance between the reference and the working electrode, minimizing the ohmic drop. Purge tubes are used when the electrolyte needs to be oxygen-free. Usually one uses an inert gas such as argon or nitrogen to purge the solution and also create an oxygen-free environment on top of the electrolyte, preventing air to enter the cell. Two bridge tubes are available: one can accommodate 6 mm diameter reference electrode and the other 8 mm diameter reference electrode. Two purge tubes are available: one has a single tube and the other is double-walled to allow the user to blanket the electrolyte.

Specifications and ordering information


ID Catalog No. OD Height Qty Purpose
Bridge tube for

analytical cells

8 mm EL-A-017 10 mm 165 mm 1 EL-ELECTRO
6 mm EL-A-008 10 mm 155 mm 1 EL-ELECTRO
Purge tube for

analytical cells



10 mm 165 mm 1 EL-ELECTRO


10 mm 200 mm 1 EL-ELECTRO


Option Catalog N°
Repair kit for Vycor-based bridge tubes 092-VYC4




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