https://www.hbkworld.com/en/products/calibration/calibration-services-for-transducers/displacement-sensor-calibration
Displacement Sensor Calibration
As a manufacturer, we offer working standard calibration for displacement transducers. For customers in Europe, we also offer on-site calibration service.
displacement sensorcalibration
https://www.keyence.com/products/measure/spectral/
Spectral Interference Displacement Sensor | KEYENCE America
KEYENCE America's Spectral Interference Displacement Sensor measures the thickness of thin films, wafers, and other spectral targets with nanometer resolution.
displacement sensorspectralinterferencekeyenceamerica