The Jerguson FlashProof design addresses two potential problems that may occur with standard level indicators: boiling fluids and flashing vapors.  By employing a larger 3″ Schedule 40 pipe and two internal guide rods, entrained gases that build up under the float can harmlessly escape.  The float is held to one side of the chamber to insure an optimized magnetic field in close proximity to the indicator, transmitter or switches.  This provides an accurate float level and indicator reading.