Analogue versus Digital

Discussion in 'General Airgun Chat' started by what barn door, Nov 7, 2018 at 4:44 PM.

  1. what barn door

    what barn door Now them tin chickens are going to get it....

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    I would like to ask from those that tinker (Phil, you know that's you!) would I see any benefit in using a digital pressure guage over my analouge one, bearing in mind the cost and the fact that I don't tweak/mess about with my regs very often and once set they seem to pretty much stay that way. I should also add that I have no itention of doing this for others so usage will be low.

    Thanks, Ian
     
  2. RobF

    RobF Administrator Staff Member

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    If you're doing it for yourself then I'd suggest one of the £20 yellow ones off Ebay rather than chucking £200+ at one. They're better for gauges than the £50 analogue ones that you can track back to alibaba and get for £3.50.

    The problems we've found with the analogue ones are : Reading parallax errors because the needle is a way above the dial, attitude errors (as you rotate the dial around in 3d, ie flat to standing, it changes), and resolution (it's hard to see small increments and thus creep... with a digital you can note 82.4 on a bit of paper and come back in an hour and see what the actual difference is)

    I ran a digital on my actual dive bottle for a while, thinking it would give me a precise fill point each time. They're not fast enough (the cheaper ones) to react by... analogue gives a better reaction time, you can see it jump when it hits the residual fill pressure, and it doesn't matter to the bar what you fill at and the errors won't make any difference.

    We know to some degree that reg pressure is arbitary (within a certain range). But creep etc can cause issues with consistency. Digital gauges just allow less room for error.
     
  3. what barn door

    what barn door Now them tin chickens are going to get it....

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    Thanks Rob,
    Will check out ebay and see what they have to offer.
     
  4. Monty

    Monty Senior Moment

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    If you go digital be prepared to become anally retentive/obsessive/mad(der). There is a certain ignorant bliss associated with analogue gauges.

    You'll start to think 0.1 bar is massive in no time :D
     
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  5. hmangphilly

    hmangphilly The Doctor

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    Ian

    For me , a Quality digital gauge is the way forward for checking regs .

    Don't bother with a cheap one , you'll forever be doubting it .
    Get yer money out ( you know you want to ) , buy a good one .

    Same as any test / measuring kit . You need to know that you can rely on it to be accurate and repeatable .
    If you buy a cheap digital ,that may or may not give accurate readings , you may as well use any old analogue that may or may not be true and that you might be reading without parrallax or might not .

    I've tried cheapo stuff , learned that lesson , cant be doing with it .

    I actually' need' to get a couple more to save swapping from one tester to another , ill see if i can get a deal on a 'bulk' buy of maybe 5 if any one wants one .

    Heads up though, i expect they will still be over £200
     
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  6. RobF

    RobF Administrator Staff Member

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    That reminds me, I didn't get a reply from them. Nudge me.
     
  7. hmangphilly

    hmangphilly The Doctor

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    Pah
    No discounts on fewer than 30 .

    201.73 plus da dreaded...
     
  8. RobF

    RobF Administrator Staff Member

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    They aint gone up much then...
     
  9. hmangphilly

    hmangphilly The Doctor

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    About £5 in 4 years

    She found your invoice
     
  10. RobF

    RobF Administrator Staff Member

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    It would have been nice for her to let me know :D
     
  11. what barn door

    what barn door Now them tin chickens are going to get it....

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    Rob or Phil, have you got a link to these gauges?
     
  12. Monty

    Monty Senior Moment

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    Last edited: Nov 8, 2018 at 9:23 PM
  13. hmangphilly

    hmangphilly The Doctor

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  14. Ceathreamhnan

    Ceathreamhnan WHFTA Champion 2013

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    Does anyone have a design for making a button bleed valve in order to cycle the reg when using the checker?
     
  15. hmangphilly

    hmangphilly The Doctor

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    Last edited: Nov 9, 2018 at 10:06 AM
  16. Ceathreamhnan

    Ceathreamhnan WHFTA Champion 2013

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    Ah thanks, the BF thing will do. I can only make something that can be done with a pillar drill.
     
  17. what barn door

    what barn door Now them tin chickens are going to get it....

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    Thank you, Rob, Phil and Monty, looks like digital it is then.
     
  18. Monty

    Monty Senior Moment

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    Good decision, they're definitely worth the money if you intend to tinker with regs, speed of recharge and the slightest hint of creep are visible within a few seconds. Some of the things we've seen would not be possible on an analogue dial, there is no comparison.

    Ambient temperature and air tube temp need to be considered, testing in direct sunlight can really mess with your head, a couple of deg C change will show up on the gauge and can look like a slow creep of 0.1 bar every 5 or 10 seconds. Even holding the reg in your hand will push the pressure up and testing just after a fill will see it drop as the temperature falls away such is the sensitivity and accuracy of these things.
     
  19. what barn door

    what barn door Now them tin chickens are going to get it....

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    OOOOhhh that sounds good Monty, I could use it to see how change in ambient temperature change effects the reg.
     
  20. Monty

    Monty Senior Moment

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    Hours of fun awaits you o_O
     

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