Abstract: An electronically operated level apparatus and method to allow the slope of a surface to be easily measured. The apparatus includes a hermetically sealed bladder partially filled with an electrically conductive liquid and partially filled with a gas. The electrically conductive liquid is free to align itself within the bladder in response to the incline of a surface. Current probes placed within the hermetically sealed bladder measure the electrical resistance of the electrically conductive liquid, and electronic circuitry converts this measured resistance into an electrical signal having an amplitude proportional to slope. Electronic circuitry is included to minimize the current drawn from the electronic components while the level is not in use. Other electronic circuitry prevents the level from operating when it is placed in an orientation which is inconsistent with its ability to sense slope.