Ideal for linear control and precision measurement applications, the subminiature DVRT® features a fast response and rugged packaging. The sensing head is also 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 of our subminiature DVRT^®s include micron resolution, linear analog output, flat dynamic response to kHz levels, and very low temperature coefficients. Free sliding transducer cores are lightweight, strong, and corrosion resistant. Cores are precision ground to insure a close sliding fit within the open bore of the stainless-steel lined DVRT® body. This precision fit allows the DVRT® to achieve extremely high repeatability. Custom strokes are also available.

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.