No documents available

The PQ1 power quality sensor detects power quality problems on standard AC power mains. It is a single-phase monitor that can also be used phase-to-phase or phase-to-neutral on three-phase power systems. The PQ1 costs less than one-tenth as much as traditional power quality monitors. It quickly pays for itself by reducing service calls on automatic manufacturing systems, semiconductor tools, medical equipment, elevator controls, and other complex systems. You can select one of 16 pre-programmed industry-standard depth/duration response curves, covering voltage sags, swells, high-frequency impulses, and power interruptions.


  • Inexpensively priced, compact in size
  • Pre-programmed to industry-standard thresholds
  • Easy to install connect AC in and relay contacts out
  • 0.5% typical accuracy
  • No software required, no computer required
  • Comes with built-in international power quality standards


  • Detects sags, swells, interruptions, and impulses
  • Captures impulses as short as 500 nanoseconds
  • Automatically adjusts to 50Hz, 60Hz, or 400Hz
  • Direct connection to 100 Vrms ~ 240 Vrms
  • Can be used at 277 Vrms ~ 600 Vrms with external step-down transformer
  • Combine three PQ1’s for 3-phase applications
semi conductor worker


  • Semiconductor manufacturing tools
  • Medical laboratory equipment
  • SCADA systems, PLC systems
  • Elevator controls
  • Ultra-low-cost substation power quality monitoring
  • Machine tools, HVAC controls, ASD’s
  • Servers and data centers, telecom centers