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bubble detecting sensor.

kurtisja

Im looking for a sensor which can detect the presence of gas in a liquid line.

 

The scope of the sensor is to be used in a wine dispensing system. My hope is when the sensor detects a gas bubble in the line, it can shut off the flow, or lack thereof, of liquid.

 

Do you stock anything which may be able to achieve this desired outcome?

 

Ive been led to believe some type of optical or proximity sensor may be able to achieve this.

 

Thanks for your time.

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    Starting out, let's freely ideate:  Aluminum foil is dynamically gauged by using radiation.  We could put a Geiger/Muller counter/detector on one side of your tube and a source on the other. . .

    Actually not being silly, this works great and isn't that hazardous because the detector is so sensitive.

     

    I wouldn't write an acoustic sensor off the table.  The tube may be less rigid when empty.  This would lower its resonant frequency, for example.

     

    Presuming your tubing is clear, we can differentiate between white wine and air using the difference in refractive index, probably.

     

    We need data my friend.  One thing is if white wine isn't clear in the near IR or near UV we are home free.

     

    I would take Douglas's sensor and hook up a good amplifier to it.  The sensor, IIRC has a logarithmic characteristic and may need to be linearized with an antilog amplifier for greatest sensitivity.  The loss characteristics might be different enough to reliably detect in the case of white wine versus air.

     

    Why are you getting bubbles?  Are you using a siphon?  Peristaltic pump?

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  • 0

    Starting out, let's freely ideate:  Aluminum foil is dynamically gauged by using radiation.  We could put a Geiger/Muller counter/detector on one side of your tube and a source on the other. . .

    Actually not being silly, this works great and isn't that hazardous because the detector is so sensitive.

     

    I wouldn't write an acoustic sensor off the table.  The tube may be less rigid when empty.  This would lower its resonant frequency, for example.

     

    Presuming your tubing is clear, we can differentiate between white wine and air using the difference in refractive index, probably.

     

    We need data my friend.  One thing is if white wine isn't clear in the near IR or near UV we are home free.

     

    I would take Douglas's sensor and hook up a good amplifier to it.  The sensor, IIRC has a logarithmic characteristic and may need to be linearized with an antilog amplifier for greatest sensitivity.  The loss characteristics might be different enough to reliably detect in the case of white wine versus air.

     

    Why are you getting bubbles?  Are you using a siphon?  Peristaltic pump?

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