The Desco 94391 Ground Gard 5 Monitor with Buzzer and Switch, Building Ground is a wrist strap and ground monitoring device for the electronics work station. It is designed to constantly monitor two single wire wrist straps using a Remote Operator Module for each user. These units provide continuous monitoring of one or two users wearing a wrist strap and ground (Verification between electrical and ESD ground). The 94391 will alarm if preset values are exceeded for capacitance, high resist and ground loss conditions. The grounding system is redundant and will still provide a limited grounding even if the utility ground is lost and the system is in an alarm state.