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Thread: LPG gauge

  1. #1
    Join Date
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    LPG gauge

    Hi all,

    Has anyone successfully made their petrol gauge (Disco1) read their LPG tank.

    The LPG sender is 0-90 ohms
    Petrol gauge is 245-19 ohms. Low petrol light on below 25 ohms.

    Problem number one is that the ranges are different. Problem number 2 is the values are opposite. Petrol low resistance when full and LPG low resistance when empty.

    My LED LPG gauge in the change over switch is reasonably accurate. It has a delay as well so the display can vary as you go around corners etc.
    The problem with it is a small bump can make it not read at all or make it read incorrectly. Plus it is in a crap spot and you cant see it easily.

    Any ideas.

  2. #2
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    My previous commodore had the one guage for both so it can be done. The Commodore I have now has seperate guages which I prefer as the better half used to borrow the car and if it even was on quarter gas she would put it on petrol, which I usually never filled past half. Then I would think I was on gas when I was on Petrol. I nearly ran it out of petrol a few times which would have killed the pump. That could be why the new model went "backwards", as there were problems. You would need some kind of reminder what the guage was reading- gas or petrol.

  3. #3
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    All I do is set the trip meter when I fill up,gas,petrol or diesel and when the fender trip reaches 700k's or the Disco gas hits 250k's I fill up.I then see how much goes in so I keep track of my mileage. Pat

  4. #4
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    Quote Originally Posted by DeeJay View Post
    You would need some kind of reminder what the guage was reading- gas or petrol.
    I was planning on utilising the amber light that is bottom centre on the instrument binnacle to show I was running LPG (no idea what this is as it is not in the manual). If that was too annoying then one of the amber ones above the petrol gauge. Being petrol and manual there are quite a few unused lights in the dash.

    Quote Originally Posted by PAT303 View Post
    All I do is set the trip meter when I fill up,gas,petrol or diesel and when the fender trip reaches 700k's or the Disco gas hits 250k's I fill up.I then see how much goes in so I keep track of my mileage. Pat
    Another problem. My trip meter does not work. Odometer yes but trip meter no. Had a look at it just the other day but still no go.

  5. #5
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    I'd imagine you can purchase a 0-250ohm sender, you can get various resistance senders

  6. #6
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    I tired this a few years ago as i wanted to hook up the senders in my twin sill tanks to the dash guage as well as reading the lpg tank sender. VDO have senders for petrol but getting an lpg sender will be difficult if not impossible.
    You could possibly make up a mini circuit board to reverse the resistance of the signal to read correctly or close enough ?
    MY08 TDV6 SE D3- permagrin ooh yeah
    2004 Jayco Freedom tin tent
    1998 Triumph Daytona T595
    1974 VW Kombi bus
    1958 Holden FC special sedan

  7. #7
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    I've looked on the net for different resistance senders but although they are mentioned everywhere on forums I cannot find anyone who sells them.

    There is also another device that is supposed to take the 0-90 ohms LPG sender reading and change it to whatever you need.

    I just made a circuit I found on the net but it does not do what I need.

  8. #8
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    I got 2 0-45ohm senders, for twin gas tanks

  9. #9
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    Do you know where to get them from or did they come out of a wreck?

  10. #10
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    Local dude, that tests tanks

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