How to Choose the Best Measuring Microscope from China?

Evaluation Dimension	Weight	What to Check	Recommended Benchmark	Required Evidence	Score
Customization Capability	20%	Ability to adapt the optical system, stage size, lighting, fixtures, software functions, and output format to the application.	Written specifications for each customized item, engineering drawings, interface requirements, and an agreed acceptance procedure before production.	Approved technical proposal, sample images, engineering change records, and a pre-production sample or demonstration.	0–5
Measurement Accuracy	15%	Accuracy and repeatability of dimensional measurements under defined temperature, magnification, lighting, and operator conditions.	The supplier states accuracy and repeatability separately, including the measurement range and test conditions. Do not accept a single unsupported “high accuracy” claim.	Inspection report, test method, uncertainty information, reference artifacts, and measurement data from multiple repeated readings.	0–5
Optical Configuration	8%	Objective magnification, zoom range, working distance, depth of field, image resolution, and suitability for the target material.	The optical specification matches the smallest feature to be inspected and provides sufficient working distance for the intended fixture or part.	Optical data sheet, field-of-view information, sample images at relevant magnifications, and a practical demonstration.	0–5
Stage and Fixture Design	7%	Stage travel, load capacity, flatness, positioning method, fixture compatibility, and access for irregular or delicate parts.	Travel and load capacity exceed the largest intended workpiece requirements, with a documented mounting pattern and repeatable part positioning.	Mechanical drawings, load specifications, stage test results, fixture drawings, and compatibility confirmation.	0–5
Calibration and Traceability	10%	Calibration method, reference standards, calibration interval, environmental conditions, and traceability of measurement results.	Calibration records identify the instrument, standards used, measurement results, date, conditions, and responsible technician. Calibration should be traceable to recognized national or international standards.	Calibration certificate, reference-standard certificates, calibration procedure, and information about the issuing laboratory. ISO/IEC 17025 accreditation is valuable for calibration laboratories.	0–5
Quality Management	8%	Control of incoming components, assembly inspection, final testing, nonconformity handling, and product traceability.	A current ISO 9001 certificate from an accredited certification body, supported by documented final inspection and serial-number traceability.	Certificate scope and validity, quality-control plan, final inspection report, serial-number records, and corrective-action process.	0–5
Market Compliance	7%	Compliance documents required for the destination market, including electrical safety, electromagnetic compatibility, and restricted substances where applicable.	For the European Economic Area, applicable CE conformity documentation should cover the complete delivered configuration. RoHS documentation is relevant when the equipment falls within its scope.	EU Declaration of Conformity, applicable test reports, technical documentation, user manual, and product labeling. A certificate alone is not a substitute for a valid conformity assessment.	0–5
Software and Data Output	5%	Measurement tools, image storage, report generation, user permissions, data export, and compatibility with existing inspection workflows.	The software supports the required measurement functions and exports commonly usable formats such as CSV, PDF, or image files, subject to version and license conditions.	Software demonstration, function list, sample report, license terms, update policy, and data-security information.	0–5
Technical Support	10%	Installation, operator training, remote diagnosis, response time, spare parts, preventive maintenance, and escalation procedures.	A documented support process with named contacts, remote troubleshooting, training materials, spare-parts availability, and defined response targets.	Service-level agreement, training agenda, troubleshooting guide, spare-parts list, support records, and escalation contacts.	0–5
Warranty and Lifecycle Cost	10%	Warranty coverage, exclusions, consumables, calibration costs, software fees, replacement parts, packaging, shipping, and installation expenses.	The quotation clearly separates equipment price, customization, freight, taxes, installation, training, calibration, software licenses, and recurring costs.	Detailed quotation, warranty terms, spare-parts price list, service rates, expected maintenance schedule, and total-cost-of-ownership estimate.	0–5
Recommended Decision Rule	Select a supplier only after reviewing technical evidence, conformity documentation, calibration traceability, and support commitments. A weighted score of 4.0 or above out of 5.0 is a useful internal target, but critical requirements such as safety compliance and measurement accuracy should be treated as pass/fail conditions.