The World's Smallest Linear Displacement Sensor!
Differential Variable Reluctance Transducer
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 submersion in aqueous environments. The Microminiature DVRT® features micron- to-sub-micron resolution, linear analog output, flat dynamic response to kHz levels, and very low temperature coefficients. Its free-sliding cores are extremely lightweight and utilize flexible, elastic, bio-compatible alloys to provide resistance to kinking and permanent deformation.
Core position is detected by measuring the coils’ differential reluctance using a sine wave 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 Teflon® cables 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 short term immersion in saline and pressurized oil.
Units available for long term immersion, corrosive and high pressure environments can be custom built to meet such requirements. LORD MicroStrain®’s desktop consoles and in-line signal conditioners provide the Microminiature DVRT® with plug and play housing, power, analog output, LCD display, RS-232 output and software. A range of modular positioning attachments and custom strokes are also available.
Features and Benefits
- micron resolution with large stroke/size ratio
- frictionless design for robust use over millions of cycles
- suitable for use in harsh fluids and environments
Ease of Use
- world’s smallest linear displacement sensor
- plug and play usability
- easily customized to suit specific requirements
- signal conditioning options for any application