KOBOLD TNF Series gas-filled capillary thermometers are highly versatile and rugged gas-filled thermometers for industrial applications. The TNF Series gas-filled thermometer 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. The KOBOLD TNF Series gas-filled capillary thermometer can be ordered with optional oil or glycerin filling for applications where high vibration is present. The TNF Series gas-filled capillary thermometer 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.