METHODS AND APPARATUS TO DETERMINE A POSITION OF A VALVE

摘要

Methods and apparatus to indicate a position of a valve (100) are described. An example apparatus includes a first pressure sensor (104) to detect an inlet, pressure of a valve, a second pressure sensor (106) to detect an outlet pressure of the valve, and a controller (126) operatively coupled to the first pressure sensor and the second pressure sensor to determine a position of the valve corresponding to one of a plurality of predetermined operational states of the valve.