The test is performed at two controlled relative humidity conditions, an upper humidity of 50% and a lower humidity of 15%, in order to see the changes in resistivity as humidity falls. In pharmaceutical production many of the processes operate at low humidity. The resistivity value will determine whether a material is conductive, static dissipative or insulating. With the latter case, care must be taken during movement of the powder to minimise charge accumulation which could increase the risk from electrostatic spark discharges.
Please call on +44 (0)1962 840570 to discuss your testing needs with Mike Weaver, our Technical Manager (email@example.com) or Gavin Rogers, our Laboratory Manager (firstname.lastname@example.org).