Abstract: A submersible liquid level measurement device having a protective covering that shields the transducer and associated internal components from harsh external environments while at the same time allowing the necessary sensitivities of the transducer to accomplish their intended purpose unimpaired by the protective covering. The measurement device includes a transducer having a transducer face. A cable is in electronic communication with the transducer face. A weight is coupled to the transducer. A housing surrounds a first portion of the transducer and an adapter coupled to the housing and surrounds a second portion of the transducer. The measurement device includes a first seal between the transducer face and the housing, a second seal between the housing and the adapter and a third seal between the cable and the adapter. The housing can include an opening through which the transducer face is exposed.

Abstract: A liquid level measurement device. The device includes a lid having a grate, wherein the grate has one or more sloped and contoured openings allowing for self-drainage. A hydrostatic measurement sensor is removably coupled to the lid. The hydrostatic measurement sensor can be removed from the lid through the grate. A base is also included. The base and the lid are connected with a ratcheting lid/base connection. An ultrasonic measurement sensor is coupled to the base.