How to distinguish between fully welded and crimped isolation diaphragms in transmitters
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This post was last edited by wwxxss_1 on 2009-12-19 at 11:57. The isolation diaphragm of transmitters can be made either by full welding or crimping; how can one check this visually, and which method is better – welding or crimping – in terms of performance? Let’s discuss!
Look at the connection between the diaphragm and the flange: welds show weld marks similar to those from TIG welding, while those made by crimping do not. It seems to be related to the pressure level; you can ask the manufacturer for details.