NRF-2 & NRF-3 - Capacitance Level and Temperature Transducer

Brand: KOBOLD Instruments, Inc

The KOBOLD NRF-2 and NRF-3 combination level and temperature transmitters are truly a unique product.

They are designed to measure level and temperature of conductive and non-conductive liquids in tanks.

For level sensing, the probe measures the change in capacitance that occurs as level changes in the tank.

For temperature sensing, the probe utilizes a platinum resistive element. The NRF-2 includes a loop-powered transmitter for both level and temperature while the NRF-3 includes a loop-powered transmitter for level and a 3-wire RTD output.

A choice of rugged enclosure types with either standard NPT or optional Tri-Clamp® process connections are offered.

The standard probe material is PFA clad 316 SS. Easy level calibration is accomplished via 4 push buttons with temperature calibration adjustment (if required) via two potentiometers located on the transmitter.
  • Measures Both Level and Temperature with One Device
  • Compact Microprocessor Based Designs
  • High Accuracy
  • NPT Threaded and Tri-Clamp® Mountings
  • Heavy Duty Industrial Design



  • 3/4” NPT
  • 1-1/2” to 3” Tri-Clamp

Level Accuracy

  • ± 1 % of Span

Level Repeatability

  • ± 0.1 % of Span


  • 4-20 mA Outputs for Level and Temperature or 4-20 mA for Level and Pt-100 for Temperature

Maximum Pressure

  • 500 psig

Media Temperature Range

  • -58° F to 392° F

Maximum Length

  • 12 Feet

Wetted Materials

  • 316 Stainless Steel
  • PTFE
  • PFA


  • Fully PFA-clad or 316 Stainless Steel


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