Waterproof Current Transformer – 4NO4 by Sentran Corp

Product Description

The 4NO4 by Sentran Corp is an outdoor, waterproof current transformer with 35 foot leads.

The 4NO4 is compliant with NEMA Type 6P / IP68W, meaning that it is fully submersible.  It comes standard with 35′ leads to facilitate long runs from the measurement location to an indoor meter.  This waterproof current transformer is built with a special, non-corrosive magnetic core and is potted for outdoor use.  In addition, it comes with a sturdy sheath to protect the 18 AWG cabling.  It is designed for easy installation on ground potential conductors.

The unit is Class 1.0 per IEC 60044-1 Table 11 and has a phase shift less than 1 degree.  It has a rated insulation level of 600 Vac, class 105.

Compatible power meters accept a 5Vac input.  Look for meters on our website that start with this symbol:


You can view all of our current sensors here.


  • NEMA Type 6P / IP68W
  • 50/60 Hz
  • Accuracy: Class 1.0 per IEC 60044-1 Table 11
  • Phase Shift: < 1 degree
  • Output impedance (Zout): Not to exceed 200 ohms
  • Acceptable load of output: At least 1000 times Zout
  • Rated Insulation Level: 600 Vac, class 105
  • Cable Length: 35 Feet

Data Sheet

Technical Spec


NEMA Type 6P / IP68W


Made in USA

ISO 9001

rohs compliant

Additional information

Weight1.62 lbs
Dimensions6 x 6 x 2 in