Insulative or Conductive ? The New Surface Resistivity Meter from Meech Gives the Answer

15.08.08

In addition to measuring surface resistivity, the 990SRM can also be used to make point to point and surface to ground measurements, which makes it useful when checking whether or not equipment is grounded. The simple, repeatable measurements range from 103 to 1012 Ohms per square, with the unit also giving a colour-coded indication of the resistivity of the material being measured - green for conductive, yellow for dissipative and red for insulative.

The Meech 990SRM is particularly useful in the plastics industry, where although most plastics would test as insulative, some coatings may cause them to have increased surface conductivity. Being able to measure the resistivity will help engineers to control static electricity levels during processing.

Use of the Surface Resistivity Meter can also test whether a material is suitable for static pinning, a technique often used for effective in-mould labelling (IML). In Meech’s experience a reading of 1010 is the minimum for this application.

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