Capacitance-based liquid level sensors, used in conjunction with Models 175, 1700, 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 brass 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 (Technical Support) and the Cryogenic Liquid Level Application Notes

See also Custom Liquid Level Sensors.