LEVEL SENSING SYSTEMS COMPRISING ELECTRONIC

Brand	Owner	Address	Description
FMD	COLTEC INDUSTRIES INC	2730 West Tyvola Road Charlotte NC 28217	level sensing systems comprising electronic control units, sensors and probes for use in stored materials in fluid and particulate form;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

Methods, apparatus, and systems for obtaining information regarding a formation, a casing, or fluid within the casing are provided which utilize an interrogator and one or more sensing devices attached to a casing in a wellbore. The interrogator is located within and may be movable inside the wellbore. The sensing device is positioned and fixed in an opening in the casing. The sensing device includes a housing and a sensor with associated electronic circuitry. The interrogator and sensing device include a magnetic coupling therebetween that is operable when the interrogator and sensing device are positioned in close proximity to one another. Preferably, the magnetic coupling is realized by at least one solenoid winding for the interrogator and at least one solenoid winding for the sensing device, which provide a loosely-coupled transformer interface therebetween. The interrogator and sensing device communicate in a wireless manner over the magnetic coupling therebetween.