Spring Loaded LVDTs Provide Precision Data

April 21, 2020

An extended family of Spring-Loaded LVDTs are for highly accurate and repeatable dimensional gaging of components as part of manufacturing quality assurance systems. Available in AC and DC-operated versions, these sensors are used in R&D labs for quality testing, printing operations for roller alignment, and automated production lines for dimensional gaging of parts in go/no go inspection. Data collected by NewTek gaging probes are used for online quality control and post-process statistical analysis.


Featuring a stainless-steel, spring-loaded probe assembly and welded ¾-in. diameter hermetically-sealed housing, Spring-Loaded LVDT Position Sensors are available in ranges from ±0.050 to ±2 in. With near-infinite resolution and excellent repeatability, these gage heads operate at linearity of ±0.15% over wide operating temperature ranges of -65 to 275°F. 


Customized versions of Spring-Loaded LVDTs operate in higher temperatures up to 400°F and environments with radiation up to 30MRad. A high-precision gaging probe, available in .315 and .375 in. diameters, offers extremely reliable performance in measurement ranges from ±.040 to ±0.200 in.


NewTek offers its Spring-Loaded LVDTs in AC, DC voltage, or 4-20 mA current outputs. The AC-operated LVDT gage heads are ideal for operation in higher temperatures as the sensor is segregated from the electronic circuitry. While the LVDT works in a hostile environment, a signal conditioner - that provides power to the sensor and demodulates output—operates remotely in a benign area. The output is displayed locally or downloaded into a PLC for statistical process control.  


Where temperature exposure is not an issue, a DC-operated LVDT gage head can eliminate the installation and cost of signal conditioning equipment. With electronics built into the assembly, the sensor simplifies mechanical set-up into automated machinery.