DC-LVDTs, on the other hand, contain high-density microelectronics that incorporate signal conditioning and processing functions. While not performing to the same temperature levels as AC versions, they offer higher accuracy and are available in 4-20mA designs.
Without any internal electronics, AC-operated displacement sensors can tolerate wider temperature ranges to perform in hostile environments and can be packaged in small sizes to fit in hard-to-reach installations. However, AC-LVDTs require an external signal conditioner that supplies the excitation signal and measures output.
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(NewTek Sensor Solutions: Pennsauken, NJ) — NewTek Sensor Solutions offers a white paper on the “Attributes and Benefits of AC- and DC-operated LVDT Position Sensors” that compares the differences in technology, unique properties, and ideal applications for each type of sensor.
NewTek offers a range of AC- and DC-operated LVDT position sensors in different configurations to meet the needs of various industries, including oil/gas, aerospace, subsea, R&D testing, packaging, turbine, pharmaceuticals, and others. For more information or help selecting a sensor, refer to the NewTek website or contact Mike Marciante at 856-406-6877.