Jerguson® Gage and Valve is a Clark-Reliance company supplying level gage glasses, magnetic level gages, liquid level switches and transmitters. Jerguson gages and valves have been installed on a wide variety of liquid level applications. Jerguson recently introduced External Cage Level Switches, Displacer Level Switches, Displacer Transmitters, Tuning Fork Switches, Ultrasonic Gap Switches, Non-Contact Ultrasonics as well as Capacitance Switches and Transmitters. Jerguson’s history with Mead O’Brien dates back to being an original product line with O’Brien Equipment Company in 1927.


  • Armored Glass
  • Magnetic Level Gauges
  • Float & Displacer Level Switches & Transmitters
  • Gage Glass Illuminators & Accessories
  • Guided Wave Radar
  • Tuning Fork Level Switches
  • Tubular Glass Gages
  • Gage Valves
  • Boiler Water Gage & Valve Assemblies
  • Ultrasonic Level Transmitters
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