MetroY Pro vs Sermoon S1: Professional Scan Performance Comparison

A practical, test-driven look at two pro 3D scanners, covering use cases, speed, detail, deep-hole capability, and accuracy workflows.

• Top-Line Summary
• 1) Product Positioning & Suitable Object Range
• 2) Scan Modes & Testing Recommendations
• 3) Deep-Hole Scanning Capability
• 4) Accuracy & Calibration
• At-a-Glance Comparison Table
• FAQ

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Top-Line Summary

MetroY Pro is best for small to medium objects and general work, but it trails on fine detail and efficiency with larger targets. It does not support rapid full-body scans or an extra infrared module for large-area markerless jobs. Sermoon S1 covers small, medium, and large objects, delivers better fine detail, higher efficiency on big parts, and can complete a ~1-minute human scan with an extra IR module that MetroY lacks. 

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1) Product Positioning & Suitable Object Range

• MetroY Pro: Suited to small–medium objects; detail on small items is inferior to S1. Large-object work is limited by scan speed and coverage, reducing efficiency. No rapid full-body workflow and no support for extra infrared modules for large-area markerless scanning. :contentReference[oaicite:2]{index=2}
• Sermoon S1: Covers small, medium, and large objects. Superior small-object detail, higher efficiency on large targets, supports ~1-minute human scans, and offers an extra infrared module for large-area markerless scanning. 

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2) Scan Modes & Testing Recommendations

• Avoid using cross-line mode to judge fine detail — it can underestimate a device’s capability. Use 7-line mode for professional detail comparisons. :contentReference[oaicite:4]{index=4}
• For medium–large objects, cross-line mode is fine, but choose substantial subjects (e.g., car doors) to expose efficiency differences.
• MetroY shows slower speed, smaller coverage, and weaker marker tracking than S1 in these scenarios. 

Example run-through:

Watch the test reference on YouTube 

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3) Deep-Hole Scanning Capability

• Deep-hole results depend on operator technique and point-cloud density, not just the scanner. 
• S1 result: depth-to-diameter ratio up to 6:1 (tested on a 28.68 mm hole)
• MetroY Pro: depth ratio needs verification; performance can vary with distance control and density settings.

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4) Accuracy & Calibration

For fair comparisons, standardise the workflow:

• Keep scanning distance within the optimal band for each device.
• Use consistent scan technique across all trials.
• Adopt a ball-bar or similar artefact for precise accuracy checks.
• MetroY Pro advertises volumetric accuracy of 0.02 mm + 0.04 mm, which should be verified using professional methods. 

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At-a-Glance Comparison Table

Criteria	MetroY Pro	Sermoon S1
Best-fit object sizes	Small–Medium	Small–Medium–Large
Fine detail on small items	Inferior to S1	Superior
Large-object efficiency	Limited by speed & coverage	Higher efficiency
Rapid full-body scan	Not achievable (no ~1-min human scan)	~1-minute human scan supported
Extra IR module (large-area markerless)	Not supported	Supported
Recommended detail test mode	Use 7-line for fair detail checks; avoid cross-line for detail	Use 7-line for fair detail checks; cross-line ok for big parts
Deep-hole capability	Needs verification; highly technique-dependent	Up to ~6:1 depth:diameter (28.68 mm hole)
Advertised volumetric accuracy	0.02 mm + 0.04 mm (verify with pro tests)	Not specified here

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Practical Testing Notes

• When comparing efficiency on larger parts, pick substantial panels like car doors to expose tracking and coverage differences clearly
• Boost point-cloud density and manage standoff distance carefully during deep features to improve capture reliability on both devices.

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FAQ

Can MetroY Pro do a rapid, ~1-minute full-body scan?

No. That workflow is not achievable on MetroY. The S1 can complete a ~1-minute human scan.

Which mode should I use for fair detail comparisons?

Use 7-line mode. Cross-line mode can under-represent detail performance.

How do I fairly test accuracy between the two?

Standardise technique and standoff distance, and use a ball-bar or similar artefact. Verify MetroY’s advertised 0.02 mm + 0.04 mm volumetric accuracy with professional methods.

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Have a specific part in mind? Pick the mode to match the job: 7-line for detail, cross-line for coverage on larger parts, and document your standoff and density settings so results are repeatable.