Zeebeetronics offers Continuous Workstation Monitor for Dual-cord Wrist Straps. Zeebeetronics also manufactures electrostatic discharge [ESD] test, measuring and control instrumentation. Continuous Workstation Monitor for Dual-cord Wrist Straps has Model Number Z108. It continuously monitors the connection to earth of the wrist strap and work surface. This monitor uses a resistance method that includes the operator`s resistance. If the operator exceeds 10 Mohms or the work surface resistance-to-ground exceeds 10 Mohms, audible and visible alarms are triggered. This unit also warns of potentially dangerous low resistance situations. Continuous Workstation Monitor for Dual-cord Wrist Straps can be used only with dual-cord wrist straps. Dual conductors provide the resistance circuit that is monitored as well as provide grounding redundancy. If one conductor fails, the other will still provide the necessary ground path.