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Thread: Built in pressure guage

  1. #1
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    Default Built in pressure guage

    Iíve recently acquired a Paros and intend to adjust the OPV. Iím aware that with the portafilter gauges it needs to be set to 10 bar as it drops when you add coffee etc.

    Going forward though Iím thinking about the dimmer switch mod and quite like the idea of being able to see the pressure live.

    my questions are:

    Are the gauges any good? Which are the 1ís to go for?
    What static pressure should I be aiming for on an in-line guage? If I use a portafilter blank should I aim for 10 and will it read around 9 when brewing?

    Cheers

  2. #2
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    I considered installing a pressure gauge but cutting the case and getting a suitable gauge, tubing etc. Too much trouble for a cosmetic effect. Portafilter pressure gauge worked well for me in adjusting OPV. 10 Bar static is the acceptable norm but you can always play around with it. Dimmer switch mod is not advisable with Ulka pump. Unless you have an Invensys vibe pump or plan to upgrade, then the mod will be worth it.

  3. #3
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    The main problem with fitting an internal gauge on a paros will be where to mount it. The whole enamel lid needs to be removable for maintenance etc which restricts options somewhat.
    Am still working out how to get one on my tebe without screwing it up.

  4. #4
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    Quite like the pressure gauge on my machine - worthwhile mod. Probably cost about £20 all in

    1995 'Coffee Gaggia' with full Gaggia Classic conversion, DIY PID Controller, OPV set to 9bar, Silvia steam wand, Botomless PF, VST 15g Basket, Motta 58mm Tamper and Ascaso I-Mini grinder

  5. #5
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    If space is a premium for any make machine, consider fitting an electronic gauge with remote pressure sensor. It will be consistently more accurate and you have more choices on where the electronic readout is located, although it won't look so retro. My Fracino mechanical pressure gauges were so far out (9 Bar guage) that I bought an electronic unit (+-1psi) just to calibrate it on an air line. Calibrating these mechanical guages for range and accuracy is challenging but doable.

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