Microminiature DVRT®
Microminiature DVRT®
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. 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.
Sensor Design
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
- miniature control elements for automotive and robotic systems
- process control for production-line monitoring
- dimensional gauging for quality control applications
- measuring strain and deflection in materials science and civil structures
- linear/angular positioning of optical components
- miniature force, torque, acceleration sensors
- measuring strain, micromotion and deformation in bone and tissue
- available with sub-micron resolution and long stroke range
- operating temperature to 175 °C
- frequency response up to 20 kHz with DEMOD-DC
- frequency response up to 8 kHz with DEMOD-DVRT
- lightweight core will not influence frequency response
- stainless steel and high-performance polymer design suitable for extremely harsh environments
- waterproof, suitable for short term submersion in corrosive media such as brake fluid and hot saline
- frictionless design suitable for high duty-cycle applications
- easily customized to suit specific applications
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Electrical Specifications Obtained using DEMOD-DVRT® and DVRT® with 800 Hz low pass filter at constant temperature
Mechanical Specifications
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General Documentation
Mechanical Prints
- Microminiature DVRT® - print which details stroke length and body length
- Microminiature DVRT® threaded core - print of DVRT® with a threaded core option
- Microminiature DVRT® threaded body - print of DVRT® with threaded body options
- Pressure equalized DVRT® - integral connector, pressure equalization portals, threaded attachment
- Pressure equalized DVRT® mounting configurations - print showing a possible mounting configuration
FAQ's
Attachments
- DVRT® body attachment (M-ATT-B3)
- DVRT® core attachment (M-ATT-C3)
- Orthopaedic attachment - barbed point illustration
- DVRT® attachment station - steel block used to hold DVRT® for M-ATT-B3 and M-ATT-C3 attachment
Support Electronics
- System chart - system illustration showing items needed for system specification
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M-DVRT-3-BX-SK4 |
Online Price: $6,745.00 Part Number: 6101-0194 |
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M-DVRT-3-BX-SK3 |
Online Price: $5,175.00 Part Number: 6101-0193 |
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M-DVRT-3-SK4 |
Online Price: $5,825.00 Part Number: 6101-0114 |
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M-DVRT-3-SK3 |
Online Price: $4,425.00 Part Number: 6101-0113 |
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M-DVRT-3-SK2 |
Online Price: $3,025.00 Part Number: 6101-0112 |
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M-DVRT-3-SK1 |
Online Price: $1,625.00 Part Number: 6101-0111 |
Displacement Sensor Comparison
