Ideal for critical linear displacement measurements, the microminiature DVRT® delivers high performance in a tiny package. Advanced materials and electronics have resulted in a rugged, fast, and sensitive instrument capable of short-term submersion in aqueous environments. Units available for long-term submersion can be custom built to meet the specific application requirements.

Features

Features of our microminiature DVRTs® include micron to submicron resolution, linear analog output, flat dynamic response to kHz levels, and very low temperature coefficients. Free-sliding transducer cores are extremely lightweight and utilize flexible, elastic, bio-compatible alloys to provide resistance to kinking and permanent deformation.

Customization

A range of stroke lengths and specialized, modular attachments have been developed. Longer stroke lengths provide greater linearity DVRTs® with nonlinearity as low as ± 0.15%. This performance, combined with versatility of design allows the microminiature DVRT® to meet the needs of a wide variety of applications.

Miniature "plug and play" signal conditioners provide linear DC output when supplied with unregulated DC power. Multichannel, OEM and digital display systems are also available.

How it works

Core position is detected by measuring the coils' differential reluctance, using a sinewave excitation and synchronous demodulator. This differential detection method provides a very sensitive measure of core position while cancelling out temperature effects.

The transducers' coils and flex circuit leads are sealed in vacuum-pumped epoxy, within the stainless-steel case. This provides outstanding environmental resistance. The DVRT® has been successfully employed in harsh applications, including immersion in saline and pressurized oil.