Vacuum gauge types/ differences

Hi pete i have an onon 3500 old school motor with no generator, just woundering what size generator that motor will pull with charco gas ? maybe 1500 watt ? continous.

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Hi @r_wesseling .
Can I use a cheap measuring instrument for these sensors?
Mastech MAS830BC Multimeter - Multimetrar | Kjell.com

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Hey Rindert; Vacuum gauges is a pretty important subject for gasifier. Could you go into a little more detail about these little gizmos . I read about one that would measure 0-40 kPa which I translate to 0-160 in. H2O. Obviously enough for woodgas work. You show the tubes coming from the various locations on the gasifier. They plug into a ā€œcircuit boardā€. What is that??? Four (?) wires go from this board to, I assume each post of a four position switch. Then a wire or two must go from the 4p switch to a gauge-- volt, amp, ??? Where is the power (+/-) for this. Sorry for having to ask, but electricity is kind of ā€œblack magicā€ to me. I think this system may have a lot of potential for wood gasserā€™s. TomC

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HI Pete,Thanks for all the scale measurment dident know there was so many different vacuem type. THE WC or water coulum, i gess is the one that is sensitive enough for wood gas measure vacuem.

Hi Jan,
I would try to use something very cheap, like this for the final system in your truck. Really there are many of this kind of things you can find in scrap.

A multimeter, like the you showed us will be very useful for setup, calibration, testingā€¦ I have one like that. I use it at least once a week.

Rindert

Tom,
Do not be sorry to ask. If you donā€™t ask you will not learn.
The little pencil sketch I made is just to show a logical system, it does not show every wire.
A printed circuit board is perhaps better called a ā€˜printed wiring boardā€™. There is a learning curve involved but after you have gone through it. Making these things is quick, cheap and easy. I think Antony Cartwright really does a good job of explaining.
Rindert

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Hi @r_wesseling, I read about your sensors, are these for vaccum or just for pressure, I think it looks like they only work on pressure?
Microsoft Word - Introduction (webnode.com)

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Jan,
Yes you are right. But, I think I can make those sensors measure both pressure and vacuum. You can see the small brass pieces in the picture. I am going to glue them to the backs of the sensor, in place of the square covers I removed.
Here you can see an old style gauge I modified so that it will measure both pressure and vacuum.
Rindert

Pressure Sensor MPS20N0040D-S
Hi, I meant these, do they work on vacuum?

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It would have to be modified, but I think it will work.
Rindert

Got some sensors and instruments tonight from my son, now I have to try to understand how to calibrate

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