The Vögtlin electronic pressure controller equipped with a pressure transmitter offers a comprehensive approach. This advanced solution allows for the determination of channel narrowing or blockage by utilizing a predefined test pressure and precisely measuring the flow. This enables quick differentiation between compliant and reject parts within very short cycle times.

Customer first performs a leak test for the entire system. Good part is determined by endoscopic examination and designated as “master part” for the test. Now the flow rate at test pressure 30 mbar g is determined. This value is used as a guide value for the assessment of the other series parts to be tested.

Depending on the size of any shrinkage cavities that may be present, there is a small to significant drop in the flow rate at a constant test pressure. This makes it possible to reliably test cavities/channels that are difficult to access in a cost-effective and effective manner. MEMS technology insures a long-term stability without any drift as long as the gas supply is clean and dry.
Dual temperature calibration avoids error caused by ambient and gas temperature better than alternative mass flow controllers.