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United Scientific SPRM01 Spherometer with 0.01mm Graduated Screw

Free shipping on orders over $29.99

$14.75

$ 7 .19 $7.19

In Stock
  • A flat glass plate is provided for support while taking precision readings.


A fine instrument for determining the radius of curvature of spherical surfaces such as mirrors and lenses. Its micrometer screw is graduated to measure displacement as small as 0.01mm. The instrument has two brass plates and three steel legs.


JR
Reviewed in the United States on November 30, 2024
I was able to measure the radius of curvature of a fountain basin within a couple of mm.
Needing Support
Reviewed in Canada on October 31, 2024
Unfortunately, this historical looking artifact is not of good quality and of little use as a measurement instrument. It is cheap in every sense of the word.There were no instructions, nor specifications, just a poorly packaged device with a glass plate in a crushed box. Perhaps it was damaged in transit, who knows. WARNING: The base pins are very sharp. They are also crooked, one wobbled and nothing measures out as it should. This is most unfortunate since the principle of the device is very sound.A generic diagram was obtained from the seller after contacting them but they have no idea of the specifications. I added measurements of mine and comments to the seller.I also found another diagram of a type with balls that would not destroy the sphere (ex: plastic or glass lenses). I also uploaded this information in case it may be of use to someone wanting to know more about how to measure spheres.Unfortunately, the AMAZON return window expired by the time I got an answer, so, buyer beware! If you are looking for a intriguing decoration, perhaps it may be of interest to you. I will gladly give you mine!
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