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Measuring contact angle of immiscible liquids

  1. Jul 4, 2016 #1
    I am looking for sources which describe how to measure the contact angle between immiscible liquids in a tube. The literature seems to be extremely lacking so if anyone has any knowledge I would appreciate the help.
  2. jcsd
  3. Jul 5, 2016 #2


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    A profile projector (aka optical comparator) perhaps?
  4. Jul 5, 2016 #3


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    You might use an optical or an ultrasonic sensor. As you advance the sensor along the axis of the tube there will be a point where the conical surface of the contact annulus reflects directly back to the sensor. Block the direct axial reflection. Measure the sensor position with a micrometer or an LVDT.
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