Entube QE

In Stock
Three-phase plus neutral Voltage Divider

  • Up to ±1500V input range on each terminal (line-to-line or line-to-neutral)
  • ±0.2V to ±10V output range (differential plus common mode)
  • DC to 50kHz frequency spectrum of operation
  • No power supply needed
  • 4000V withstanding surge voltage for 5 seconds
  • Designed for interfacing with differential input DAQs


Price and options

460.00 460.00 460.0 USD


  • Input Voltage
  • Output Voltage
  • Wiring Configuration
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The Entube-QE series is designed for high quality three-phase measurements plus neutral in a very compact form factor without need for power supplies. This series covers the ranges from ±50V to ±1500V, with up to 85kHz bandwidth and 0.2% accuracy.
The Entube-QE sensor operates as a differential divider network with an anti-aliasing filter on its output. It generates a ±5V or ±10V scaled down version of the line-to-line voltage on its input terminals. 
This signal can then be processed by most computer based measurement platforms.

One Entube-QE replaces 4 sensors, and only requires one cable for all four signals. This allows for very high channel densities, while delivering high performance for a low cost.

Flux Gate Methodology

The IsoBlock I-FG-4C uses Flux-Gate methodology to measure the current flowing through the input conductor. This technique works by placing a toroid with a high number of turns (secondary) around the input current path (primary), while a close-loop circuitry controls the current through the secondary to null out the magnetic field inside the toroid. The input current is then obtained by multiplying the current from the control circuitry by the number of turns of the secondary. This is followed by an anti-aliasing filter and a conditioning stage to output a ±5V signal.