GAGGIA Classic | I am not sure when you test the OPV pressure with a Portafilter gauge if that is dynamic or static BAR
![Gaggia Classic Pro customised with PID, Gauge, Dimmer & 9 Bar Pressure Spring (All colours available) Gaggia Classic Pro customised with PID, Gauge, Dimmer & 9 Bar Pressure Spring (All colours available)](https://cdn.ecommercedns.uk/files/4/250104/1/22585831/black-white-gaggia-classic-coffee-machine.jpg)
Gaggia Classic Pro customised with PID, Gauge, Dimmer & 9 Bar Pressure Spring (All colours available)
![Gaggia housing for PID controller and pressure gauge by jakesmorrison | Download free STL model | Printables.com Gaggia housing for PID controller and pressure gauge by jakesmorrison | Download free STL model | Printables.com](https://media.printables.com/media/prints/140834/images/1335404_ccb83181-5991-45a3-8fc6-ecb10ac143c4/thumbs/inside/1280x960/jpg/img_1155.webp)
Gaggia housing for PID controller and pressure gauge by jakesmorrison | Download free STL model | Printables.com
![Portafilter Pressure Gauge Tester for Coffee Espresso Machines by EDESIA ESPRESS : Amazon.co.uk: Home & Kitchen Portafilter Pressure Gauge Tester for Coffee Espresso Machines by EDESIA ESPRESS : Amazon.co.uk: Home & Kitchen](https://m.media-amazon.com/images/I/71hTZivaKhL._AC_SL1500_.jpg)