COMPACT SOLENOID
Compact-Bore High-Field Solenoid for Compact Magnetometry
Woodruff Engineering’s Compact Solenoid delivers a 200 mT central magnetic field within a compact 40 mm bore for biomedical magnetometry, sensor characterization, and magneto-optical research applications requiring high field strength in a constrained working volume. Constructed as a precision dry-wound copper solenoid (1,250 turns of AWG12 magnet wire over 24 radial layers) mounted between 170 mm × 170 mm aluminum support plates, the system generates a highly uniform field with ~0.1% homogeneity over a 4.5 mm central region. The standard build supports bipolar operation with a –200 mT to +200 mT field sweep over 2 minutes, suitable for hysteresis characterization, retinal imaging workflows, and calibration of magnetically responsive samples.
Technical Specifications
207 mT
Peak Central Field
~0.1 %
Field Homogeneity
40 mm
Clear Bore
160 mT
Max Continuous Field
Our compact solenoid is designed from the ground up for cutting-edge scientific and industrial applications. This robust solenoid is built to withstand long-term operation. Powerful cooling allows stable and uniform field generation over long time scales. Customizable geometry and power ratings give you full command over field characteristics. View our comprehensive spec sheet below or send us a message to find out how we can magnetize your project.
Key Features
Optional Water Cooling
Water cooling is available in several configurations if air cooling is insufficient. Achieve continuous field strength of 160mT at 20A.
Clear Bore
The solenoid’s bore is unobscured, providing maximum space for instrumentation and materials.
Sweep Capability
Certain configurations can be operated with a bipolar power supply to perform sweeps.
Why Choose OUR COMPACT SOLENOID?
CUSTOM-MADE • At Woodruff Engineering, we work with you to design a coil perfectly suited to your needs.
READY TO USE • This solenoid comes with everything you need, including optional chillers and power supplies.
RELIABLE PERFORMANCE • Our coils are built to last. Even after thousands of thermal cycles, your solenoid will continue to generate a precise, uniform field.
HEAVY-DUTY • Ideal for testing on long time scales, our FEM-simulated coils are guaranteed to withstand demanding operating conditions.
Target Applications
Magneto-Optical Material Characterization
Kerr, Faraday-rotation, and magneto-optical spectroscopy setups depend on a stable, well-defined field at the sample position.
Sensor & Magnetometer Calibration
The FEM-verified field-vs-current relationship makes this solenoid a natural fit as a calibration reference for Hall probes, fluxgates, and other magnetometers.
Thermally-Constrained Research Setups
Modeled cooldown curves and steady-state numbers let a researcher pick the right cooling configuration up front.
Benchtop Magneto-Optical Trap (MOT) Coils
FEM-verified 0.1% homogeneity over the working volume gives atomic physics labs a known, trustworthy field profile right where the trapped atoms sit.
