Abstract: The invention is a level meter having a flexible probe. The flexible probe includes a flexible conductor and at least one flexible band shield member disposed in a substantially vertically parallel relationship with the conductor, where the conductor and the shield member are offset from each other.

Abstract: The inventions is an explosion proof housing cover seal. The cover seal includes a housing and a cover, where the housing has an interior and an opening into the interior defined by a housing sidewall. The housing sidewall have a threaded portion. The cover has a sidewall with a cover threaded portion that mates with the housing sidewall threaded portion. The cover sidewall includes a circumferential cover bevel portion, and the housing sidewall has a matching circumferential housing bevel portion, where the two bevel portions contact circumferentially when the cover is sealingly engaged with the housing opening. The explosion proof housing cover seal further has a seal channel to contain a seal member. Each of the bevel portions has a proximal end, and the bevel proximal ends are positioned adjacent to the seal channel when the cover is sealingly engaged with the housing opening.

Abstract: The invention is an improved housing for storage of an electronics interface package. The housing is attached to a sensor adaptor or connector, and rotatable about that sensor adaptor. The interface package is contained in the interior of the housing, and is orientatable in the interior to provide different angles of view.

Abstract: The invention is a level meter having a flexible probe. The flexible probe includes a flexible conductor and at least one flexible band shield member disposed in a substantially vertically parallel relationship with the conductor, where the conductor and the shield member are offset from each other.

Abstract: A controller that is linearly responsive to an input voltage provides continuously adjustable control of the width of a periodically repeating digital pulse, thereby achieving a linear voltage to duty-cycle ratio transfer function. The circuit of the present invention includes a master clock input, a ratio control voltage input, a controlled duty cycle clock output, a high gain amplifier configured as an integrator having differential inputs, each equipped with a low pass filter, a controlled current source, a resettable timing capacitor, a threshold detector and a reference pulse generator.