Abstract: A self-contained solar-powered illuminated safety marker having an improved housing design adapted for secure, flush-mounting into a road surface which includes a projection positioned to extend vertically downward from the bottom surface of the safety marker to secure the housing in its flush mounted position into a road surface and a solar cell with circuitry designed to illuminate the safety marker in response to a variety of environmental conditions.

Abstract: A self-contained solar-powered illuminated safety marker having an improved housing design adapted for secure, flush-mounting into a road surface which includes a projection positioned to extend vertically downward from the bottom surface of the safety marker to secure the housing in its flush mounted position into a road surface and a solar cell with circuitry designed to illuminate the safety marker in response to a variety of environmental conditions.

Abstract: A self-contained solar-powered illuminated safety marker having an improved housing design adapted for secure, flush-mounting into a road surface which includes a projection positioned to extend vertically downward from the bottom surface of the safety marker to secure the housing in its flush mounted position into a road surface and a solar cell with circuitry designed to illuminate the safety marker in response to a variety of environmental conditions.

Abstract: Effective power regulation may be achieved for a field instrument that derives power from a communication signal. In particular aspects, a system and process for power regulation include the ability to receive a communication signal and adjust the voltage supplied to a power converter based on the current of the communication signal. The system and method also include the ability to convert power of the communication signal with the power converter.

Abstract: Controlling fluid regulation may provide increased efficiency and reliability. In one general aspect, a system and process for fluid regulation may include the ability to receive a command signal, generate a control signal based on the command signal, and move a magnetizable element relative to a wire coil in accordance with the control signal, the movement affecting a pressure in a pressure cavity. The system and process may also include the ability to sense the pressure in the pressure cavity due to the position of the magnetizable element and adjust the control signal based on the sensed pressure and the command signal. The system and process may further include the ability to sense a second parameter of the fluid regulation system and adjust the command signal based on the second parameter.