Designed to get into tight spaces, the subminiature gauging DVRT® delivers high performance in a small package. A ruby bearing and hardened stainless steel ball guide the springloaded tip, providing an exceptionally smooth static and dynamic response and resistance to side load.

Features of the subminiature DVRT® includes: sub-micron resolution, linear analog output, flat dynamic response to kHz levels, and very low temperature coefficients. Extremely lightweight, captive cores are small yet rugged. Manufactured using corrosion-resistant alloys, the subminiature gauging DVRTs® are suitable for short-term submersion in harsh media such as brake fluid and hot saline. Units available for long-term submersion can be custom built to meet the specific application requirements.

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. Custom ranges are available on request.

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.