TNF - Gas-Filled Capillary Thermometer

Brand: KOBOLD Instruments, Inc

KOBOLD TNF gas-filled capillary thermometers are highly versatile and rugged gas-filled thermometers for industrial applications.

The TNF is available as a simple temperature indicating device or as a controller with one to four adjustable switch points. The sensing bulb is filled with inert nitrogen.

Temperature changes at the bulb result in a change in nitrogen pressure, which is sensed in the indicating mechanism and displayed as a change in temperature.

Capillaries are available in stainless steel and stainless steel with a flexible stainless steel armor sheath.

A selection of indicator housings is offered with wall-mounting brackets or panel-mount flanges.

This thermometer can be ordered with a variety of optional oil fillings for applications where high vibration is present.

The TNF is also available with dial sizes ranging from 63 to 250mm (2.5" to 10").

A variety of fittings is available to suit almost any application.
  • Gas-Filled, Capillary Thermometer
  • Available With Up To Four Switches


Measuring Range

  • -40° F to 100° F
  • 32° F to 1100° F


  • 1/2” NPT
  • 1” NPT
  • G 1/2
  • G 1

Housing Material

  • Painted Steel
  • Aluminum
  • Stainless Steel

Housing Diameter

  • 2-1/2” to 10”

DIN Accuracy Category

  • 1.0
  • 1.6


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