Requesting a quote for a magnet system sounds simple:
“We need an electromagnet.”
“We need a Helmholtz coil.”
“We need a magnetic field system for our lab.”
“Can you quote a Hall measurement or low-temperature system?”
But for customized scientific instruments, a short request is rarely enough.
The difference between a fast, useful quotation and weeks of back-and-forth often comes down to one thing: the quality of the information provided at the beginning.
For electromagnets, Helmholtz coils, Hall measurement systems, cryogenic instruments, and custom magnetic field systems, photos and drawings can help suppliers understand the real application faster, reduce wrong assumptions, and prepare a more accurate technical proposal.
This article explains 10 types of photos and drawings that can make your RFQ more efficient.
1. A Photo of the Existing Test Setup
If the magnet system needs to work with an existing experiment, start with a clear photo of the current setup.
This may include:
- Optical table
- Sample stage
- Probe station
- Cryostat
- Vacuum chamber
- Sensor fixture
- Motion platform
- Existing power supply or amplifier
- Existing measurement instruments
A setup photo helps the supplier understand the real environment, not only the written requirement.
For example, a customer may say “we need a compact Helmholtz coil,” but the photo may reveal limited table space, nearby metal structures, restricted cable routing, or a sample holder that requires side access.
A single photo can prevent several rounds of unnecessary clarification.
2. A Top-View Layout Drawing
A top-view drawing is one of the most useful documents for custom magnet systems.
It does not need to be perfect CAD at the early stage.
Even a simple sketch with dimensions is better than no drawing.
A useful top-view drawing should show:
- Available table area
- Sample position
- Magnet or coil position
- Nearby instruments
- Cable direction
- Operator access
- Mechanical clearance
- Door, wall, or enclosure restrictions
For Helmholtz coils and multi-axis coil systems, the top view helps determine whether the coil can physically fit around the sample area.
For electromagnets, it helps confirm whether there is enough space for the yoke, pole gap, cooling hoses, and sample access.
Technical drawings are widely used to visually communicate how something functions or is constructed, and engineering drawings help specify geometry and dimensions for engineered items.
3. A Side-View or Height Clearance Drawing
Many quote delays happen because height clearance is not clear.
A system may look feasible from the top view, but fail when vertical space is considered.
A side-view drawing should show:
- Table height
- Sample height
- Required center-field height
- Probe or fixture height
- Cryostat tail length
- Optical path
- Vacuum chamber height
- Any overhead restrictions
- Required loading or unloading space
This is especially important for:
- Electromagnets
- Vertical-field systems
- Cryogenic measurement systems
- Probe stations
- Optical MOKE setups
- Hall measurement systems
- Systems requiring sample rotation or translation
For example, if a sample must sit at a specific height inside a pole gap, the magnet design must match that geometry. Otherwise, the field may be correct, but the system may not be usable.
4. A Photo or Drawing of the Sample
The sample is often the center of the system, but its details are frequently missing.
Suppliers need to know:
- Sample size
- Sample shape
- Sample thickness
- Sample holder dimensions
- Contact method
- Required field direction
- Required temperature environment
- Whether the sample needs optical, electrical, or mechanical access
For Hall measurement systems, sample geometry and contact layout are critical.
For electromagnets and Helmholtz coils, the sample size helps define the required working volume or pole gap.
For cryogenic systems, the sample holder and wiring method may affect thermal load, available space, and measurement configuration.
A photo with a ruler next to the sample is often more useful than a vague phrase such as “small sample.”
5. A Drawing of the Required Magnetic Field Region
Magnetic field requirements should not only state the maximum field.
A good RFQ should show where the field is needed.
For example:
- Center point only
- 10 mm × 10 mm area
- 25 mm diameter spherical region
- 50 mm long sample zone
- Full sensor package volume
- Wafer-level area
- Field along one axis
- Rotating field or multi-axis vector field
For Helmholtz coils, the working volume and uniformity requirement are closely linked.
For electromagnets, the field region is related to pole diameter, pole gap, sample position, and field measurement method.
Without a defined field region, the supplier may quote a system that reaches the target field at the center but does not support the customer’s actual measurement volume.
6. Photos of Nearby Metal Structures
This is often ignored, but it matters.
Nearby metal structures can influence magnetic field behavior, especially in low-field or calibration applications.
Useful photos may include:
- Steel test frame
- Wind tunnel structure
- Optical table frame
- Machine enclosure
- Robotic arm
- Shielding box
- Large metal cabinet
- Ferromagnetic fixtures
- Nearby motors or transformers
For example, if a customer wants a Helmholtz coil for magnetic sensor calibration, surrounding steel structures may distort the local field.
The coil itself may be well designed, but the site environment may still affect the final result.
Providing photos of nearby structures helps the supplier decide whether simulation, shielding, relocation, or on-site verification should be considered.
7. Photos or Datasheets of Existing Power Supplies and Amplifiers
Many customers want to reuse existing power supplies or amplifiers.
This can be practical, but the supplier must confirm compatibility.
Please provide:
- Front panel photo
- Rear panel photo
- Nameplate photo
- Output voltage and current rating
- DC or AC output capability
- Constant current or constant voltage mode
- Frequency range
- Load type limitations
- Communication interface
- Connector type
- User manual or datasheet if available
For coil systems, power supply selection is not only about whether there is output. It determines whether the current, and therefore the magnetic field, can be controlled predictably.
This is especially important for Helmholtz coils, electromagnets, and custom AC magnetic field systems.
8. Cooling and Utility Connection Photos
Cooling and utilities often affect the final quotation.
For water-cooled electromagnets, high-duty-cycle coils, cryogenic systems, and high-power power supplies, the supplier may need to understand:
- Whether a chiller is available
- Cooling water inlet and outlet conditions
- Hose connection type
- Flow rate capability
- Lab power supply
- Plug type
- Voltage and frequency
- Grounding condition
- Compressed air or vacuum availability if needed
- Drainage or ventilation restrictions
A photo of the lab utility area or existing chiller can help avoid quoting the wrong configuration.
For example, if the customer expects continuous high-field operation but has no cooling infrastructure, the quote may need to include a chiller or a different cooling strategy.
9. A Drawing of Cable, Hose, and Operator Access
A magnet system must be operated, not only installed.
Cable and hose routing can affect:
- Safety
- Noise
- Maintenance
- Operator access
- Sample loading
- Measurement repeatability
- System footprint
Useful drawings should show:
- Where the power supply will sit
- Distance from power supply to magnet or coil
- Cable path
- Hose path
- Computer location
- Operator position
- Emergency access
- Door or bench clearance
- Sample loading direction
For high-current coil systems, cable length and connector quality can affect voltage drop, heating, and noise.
For cryogenic or vacuum systems, access direction may determine whether the system is practical in daily use.
This is why layout information is part of engineering, not decoration.
10. Any Existing CAD, STEP, PDF, or Assembly Drawing
If available, provide CAD or assembly files early.
Helpful formats may include:
- STEP
- IGES
- DXF
- DWG
- PDF drawing
- 2D sketch with dimensions
- Assembly drawing
- Instrument datasheet
Engineering drawings commonly communicate geometry, dimensions, tolerances, materials, and other information needed to define an engineered item.
For custom magnet systems, CAD files can help suppliers evaluate:
- Mechanical fit
- Sample access
- Collision risk
- Installation space
- Fixture design
- Cable routing
- Integration with existing instruments
If CAD cannot be shared for confidentiality reasons, a simplified drawing with key dimensions is still very helpful.
Why These Files Make RFQs Faster and More Accurate
A request for quotation is a procurement process where a buyer asks suppliers to provide quotes for products or services. For accurate and comparable quotes, RFQs typically need clear specifications so suppliers are quoting the same requirement.
For scientific instruments, photos and drawings help improve RFQ quality because they reduce assumptions.
They help suppliers answer:
- What is the real application?
- Is this standard or customized?
- What physical constraints exist?
- What field region is required?
- What accessories are needed?
- What installation risks should be considered?
- Is simulation necessary?
- Can existing equipment be reused?
- What should be included or excluded in the quote?
Better input leads to better quotation quality.
Poor input usually leads to vague pricing, wrong assumptions, or repeated clarification emails.
A Practical RFQ Package for Magnet Systems
Before requesting a magnet quote, a strong RFQ package may include:
- Application description
- Target magnetic field
- DC or AC operation
- Required frequency if AC
- Working volume or pole gap
- Field uniformity requirement
- Sample size and photos
- Installation space photos
- Layout drawings
- Existing equipment information
- Cooling and power conditions
- Required training or installation support
- Expected timeline
- Procurement stage or budget status
This does not mean every customer must prepare a perfect engineering file before contacting a supplier.
But the more customized the system is, the more important these materials become.
How Cryomagtech Supports Magnet System RFQs
Cryomagtech supplies magnetic field systems, electromagnets, Helmholtz coil systems, Hall measurement-related configurations, cryogenic instruments, and excitation power supplies for overseas research and industrial laboratories.
For customized projects, we help customers clarify:
- Required magnetic field and working volume
- Standard vs custom system options
- Mechanical fit and installation constraints
- Power supply and cooling requirements
- Documentation and training scope
- Whether simulation or further engineering review is needed
If you are preparing a magnet system RFQ, sending photos and drawings early can often save weeks of back-and-forth and help us recommend a more realistic configuration.
References
- Wikipedia – Request for Quotation
RFQs are used to request supplier quotes, and more detailed specifications help make quotes more accurate and comparable.
https://en.wikipedia.org/wiki/Request_for_quotation - Wikipedia – Engineering Drawing
Engineering drawings communicate geometry, dimensions, tolerances, materials, and other requirements for engineered items.
https://en.wikipedia.org/wiki/Engineering_drawing
Key Takeaways
- A magnet quote is more accurate when photos and drawings are provided early.
- Setup photos reveal real installation constraints that written requirements often miss.
- Top-view and side-view drawings help confirm space, height, and access.
- Sample photos and field-region drawings help define the real magnetic requirement.
- Existing power supply, cooling, and utility information can prevent wrong configuration choices.
- For custom systems, drawings are not extra paperwork — they are the fastest path to a useful quotation.
A good RFQ does not need to be complicated.
It needs to show the supplier what the system must do, where it must fit, and what constraints cannot be ignored.