The Alliance Sensors Group (Moorestown, NJ) has introduced the PG Series of linear variable differential transformer (LVDT) position sensors. The products are designed specifically for valve position sensing applications, such as steam turbine control systems in electric power generation plants. Installation features include standard body clamps, flange mounts, ball joint couplings, and rod eye ends. Two double-contact shaft seals keep contaminants from the LVDT’s bore. With no connector, the sensor has screw clamping terminals that accept No. 24-14 AWG wire. Continuous sensor operation is possible in ambient temperature up to 350 °F (175 °C).

A PG series LVDT’s 3/8-inch diameter operating rod, offered with either a rigid coupling or a ball joint coupling, captivates the LVDT’s core so that it can never come out or vibrate loose. Alliance Sensors Group PG Series LVDTs are available in five full scale ranges from 0–3 to 0–15 inches (75 to 380 mm).

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