Capacitance-based liquid level sensors, used in conjunction with Models 175, 185, 186, and 286 cryogen
monitors and controllers, are typically manufactured of 3/8 inch OD stainless steel tubing and will
operate with virtually all common laboratory cryogenic liquids including nitrogen, liquid neon, and
liquid xenon. Sensors for common Industrial Use Cryogenics are also available for materials such as
liquid oxygen (LOx), liquid hydrogen LH2), liquid carbon dioxide (liquid CO2), liquified or liquefied
natural gas (LNG), liquid argon, liquid propane, and liquid butane. Upon request, special assembly
techniques can be applied for sensors required for liquid oxygen or hydrogen measurement. Sensors can
be supplied in single-section overall lengths of up to 50 feet. Alternatively segmented sensors are
available that can be bolted together during installation.
Three standard sensor mounting configurations are available. The typical configuration includes a
hermetically sealed BNC connector with an adjustable 3/8 NPT nylon feed-through. For higher pressure
or vacuum applications, a welded stainless steel 3/8 NPT BNC connector fitting or conflat flange BNC
connector fitting, respectively, is available. A connecting coaxial cable and in-line
oscillator/transmitter are required to interface the sensor to the non-industrial instrument.
For more information,
view the Liquid Level Sensor Operations Manual
Cryogenic Liquid Level Application Notes
See also Custom
Liquid Level Sensors.