The Desco 19662 Dual-Wire Dual Operator Monitor monitors two operators and two ESD worksurfaces eliminating the need for periodic testing and record keeping of wrist straps. The Dual-Wire Dual Operator Monitor uses low-voltage steady state DC continuous-loop technology to continuously monitor (versus pulsed or intermittent) dual-wire wrist strap functionality. Independent audio and visual alarm conditions identify the status of the worksurfaces and operators. Two operator remotes with 10 foot cables are included for use at adjacent workstations. Each monitor is calibrated with accepted procedures and standards traceable to the National Institute of Standards and Technology (NIST) and includes a NIST certificate.

The 19662 uses a loop electrical resistance technology. A +5 or +8 volt test signal is generated by the monitor and placed on one conductor of the dual wire wrist strap. The test voltage is bridged to the opposite conductor through the skin of the wearer of the wristband and returned to the monitor. Resistance is monitored with a stable continuous signal through one conductor, across the skin of the operator, and returning to the monitor through the opposite conductor. Desco dual wire dual operator monitors determine that the operator's path-to-ground is between the 10 or 35 megohms2 upper limit (adjustable) and 1 megohm lower limit.