| 摘要 |
<p>A condition responsive control unit adapted to be connected to a condition sensor and which has its output current controlled in a modulated fashion between two calibrated valves. The current is applied to a modulating condition altering means, such as a special current modulated solenoid valve, or any other type of current operated load. Two load control circuit means are used with a common output point to control the current between the two selected load control values.</p> |
