Fluke PQ400 Power Quality Window with cables, cable ties & markers


Excluding GST 10%


  • Permanently connected voltage and current sensors located inside the electrical panel allow you to make power quality and energy measurements using the external access points without opening the panel door, reducing operator risk
  • Voltage and current connections for three-phase voltages, neutral and ground cover most measurement scenarios
  • Automatic probe detection for 1740 and 1730 series power quality and energy loggers and compatible clamps, eliminates the need to open cabinet to check the clamp model
  • Full 360° rotation allows the window to be oriented in any direction
  • Simple installation using a step drill bit and electro-hydraulic hole punch (114.3 mm, 4.5″ diameter)
  • CAT IV, 600 V and CATIII 1000 V rating according to IEC61010-2-30
  • Compatibility with standard 4 mm shrouded safety-socket voltage test leads makes it easier to make voltage connections, and increases safety by reducing the risk of accidentally touching live electrical components

Available on backorder


Featuring a power quality window that enables the connection of three-phase measurement equipment to energized panels, without the need to open the panel door or wear supplemental personal protective equipment (PPE). It has a safety rating of CAT IV, 600V and CAT III 1000 V rating according to IEC61010-2-30.

Fluke PQ400 Offers

Compliance without compromise. Safety without sacrifice.

Reduced risk

Permanently installed voltage and current connections can be accessed without opening the panel door

The window gives you access to the critical power quality and energy data you need, all while decreasing testing time and helping you to maintain safety.

  • Reduce the risk of arc-flash and electrocution, while increasing the safety of your personnel
  • Decrease maintenance costs and reduce downtime by making critical power quality and energy measurements without opening the panel door, enabling logging and monitoring at any time—without disrupting operations
  • Reduce work permit requirements and processes by reducing the hazards associated with taking measurements on open panels, saving time and effort
  • Increase measurement efficiency and reduce the need for arc flash PPE, saving time, increasing efficiency and increasing operator comfort

How it works

The electrical measurement window is a permanently installed interface that provides technicians with near instant access to electrical panels for making critical power quality and energy measurements. It installs using a standard step drill bit and electro-hydraulic hole punch (114.3 mm, 4.5″ hole diameter), and allows users to make three-phase voltage, current and ground connects covering most measurement configurations. Once installed users can simply unlock the window cover, lift the lid, and connect the voltage leads of the logger or analyzer. Then, connect the leads for the current sensors and start making critical measurements. Once complete, simply remove the voltage and current connections from the front panel interface and lock the window lid, leaving the internal connections in place for future use.


  • Electrical
  • Datacenters
  • Waster water
  • Healthcare
  • Heavily automated plants
  • Semiconductor manufacturing
  • Power utilities
  • Petrochemical

What’s included with the Fluke PQ400

  • Power Quality Window
  • 4 x 6.56′ (2 m) Male-Male Cables
  • Cable Marker Set
  • Cable Ties
  • Instruction Sheet