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Name of this instrument? similar to vernier calliper

  1. Mar 27, 2012 #1
    I used this instrument to measure the length of a slit.

    It was similar to vernier calliper but it looks like a microscope and had movable small magnifying glass to determine the line that perfectly matches up with the measured value.

    It measured to hundreth of a millimeter...

    does anyone know what this is called?

    It looked quite antique old fashioned looking, by the way.
     
  2. jcsd
  3. Mar 27, 2012 #2
    micrometer screw gauge
     
  4. Mar 27, 2012 #3
    um it looks like a microscope, not micrometer
     
  5. Mar 27, 2012 #4
    I think it is a "travelling microscope"
    The small magnifier is for reading the vernier scale.
     
  6. Mar 27, 2012 #5
    yep thats the one thank you so much ;)
     
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