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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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  • 0

    Thanks for all the input guys! what an awesome community this seems to be!

     

    There are bubbles in the line because we are using nitrogen to displace wine in a bottle (to avoid oxidisation) however when the wine bottle empties the gas is pumped through the line and heart exchange. Hence we want to minimise gas in the line.

     

    The solution I've been experimenting with today involves two electrodes either side of the line immersed in the wine. When there is wine flowing through, the circuit is complete, when there is no liquid, no circuit. Then we just need a relay or something which can activate the gas on/off switch.

Reply
  • 0

    Thanks for all the input guys! what an awesome community this seems to be!

     

    There are bubbles in the line because we are using nitrogen to displace wine in a bottle (to avoid oxidisation) however when the wine bottle empties the gas is pumped through the line and heart exchange. Hence we want to minimise gas in the line.

     

    The solution I've been experimenting with today involves two electrodes either side of the line immersed in the wine. When there is wine flowing through, the circuit is complete, when there is no liquid, no circuit. Then we just need a relay or something which can activate the gas on/off switch.

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  • 0 in reply to kurtisja

    Hi Kurtis - You may want to consider that if you put over 1.23 volts of voltage across the wine you will electrolyse the water molecules and create a bubble of hydrogen and oxygen at your sensor site. This process will be accelerated if you are trying to run a relay directly as the current involved to close a relay is fairly high. If you can use the electrode sensor to control an E MOSFET or an OP amp that in turn controls the relay at least your hydrogen and oxygen production at the site will be held low. From a stand point of not messing electrochemically with your product a non-invasive processes of sensing the bubble as mentioned by Don or Doug or John's ultrasonic might be preferred.

    John