NRF-1W - Flexible Cable Water Well Level Transmitter

Brand: KOBOLD Instruments, Inc

The KOBOLD NRF-1W flexible-cable water well level transmitter is a highly dependable, deep water-well level sensor, designed to measure water levels within in-ground pipes of 3/4" ID and larger. 

All wetted surfaces are PFA-clad and 316 stainless steel. The flexible, segmented weight facilitates ease of installation around slight bends in pipes. 

The microprocessor-based transmitter, which converts the capacitance change into a linear, highly accurate 4-20 mA signal, is mounted in the head mounted enclosure. Optional remote-mounted electronics are also available. 

The water-well level transmitter operates at a higher frequency than similar devices, up to 2 MHz maximum, thereby minimizing the effects of coating on the probe. 

The compact and advanced microprocessor-based design makes installation and set-up a simple task.
  • Flexible Cable Lengths Up to 1000 Feet (300m)
  • Accuracy of ± 1% of Span
  • High Frequency Propagation Resists Errors Due to Coating
  • PFA-clad SS Cable
  • Flexible, Segmented ½" Diameter Stainless Steel Cable Weight
  • Simple, Non-Interacting Zero and Span Adjustment



  • ± 1 % of Span


  • ± 0.1 % of Span

Maximum Length

  • 1000 Feet

Standard Fitting

  • 3/4” NPT


  • PFA-clad 3/32” Diameter SS Cable

Process Temperature Range

  • -100° F to 350° F

Maximum Pressure

  • 100 psig @ 70° F
  • 50 psig @ 300° F
  • 14 psig @ 350° F


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