#dustcombustion

[sigmahseindia]

The test is performed at two controlled relative humidity conditions, an upper humidity of 50% and lower humidity of 15%, in order to see the changes in resistivity as humidity falls The resistivity value will determine whether a material is conductive, static dissipative, or insulating.

https://www.sigma-hse.co.in/process-safety-testing/powder-volume-resistivity.html