Linear position sensors for power plant applications

Hermetically-sealed linear position sensors from NewTek Sensor Solutions tolerate the high temperatures and vibrations of steam turbines to deliver accurate and reliable position feedback on the position of governor and throttle valves. Their high measurement accuracy also makes them ideal to monitor turbine shell expansion and bearing vibrations as part of process control systems.

As power plants must operate to specific control algorithms, NewTek HAR-Series of AC-operated LVDTs can help operators determine when valves are closed or open and to what degree. Maintaining these algorithms ensure turbines operate efficiently and cost effectively.

Providing feedback on turbine shell expansion, these sensors give operators the measurements needed to determine the thermal growth of steam turbines as the shell expands during startup, operation and shutdown. These measurements help identify if dimensions exceed expected temperature growth differentials. In addition, when installed on various locations on a steam turbine, the HAR-Series Hermetically-sealed Position Sensors monitor bearing vibration to detect bearing clearance limits that indicate bearing wear.

HAR-Series LVDTs offer contactless measurement in a wide temperature range of -65°F to 275°F. A high-temperature IP-68 version of this AC-LVDT is available in the HATR-750 Series that tolerates temperature ranges of -65°F to 400°F. The sensors also feature a radial connector that reduces housing length so units fit into tight spaces.

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