Patents Assigned to Sengentrix, Inc.
  • Method and apparatus for monitoring the level of liquid nitrogen in a cryogenic storage tank
    Patent number: 5842347
    Abstract: A monitoring apparatus is provided for use in cryogenic storage tanks. The monitoring apparatus is a combination cap and monitoring system. The monitoring system includes a sensor which is submerged in liquid nitrogen, a circuit for detecting changes in resistance of the sensor should the liquid nitrogen level fall to or below a selected level, and an audio output device which generates an audible alarm if the liquid nitrogen falls to or below the selected level.
    Type: Grant
    Filed: September 29, 1997
    Date of Patent: December 1, 1998
    Assignee: Sengentrix, Inc.
    Inventor: Kent Kinder