Last updated: October 23, 2026
Start with the measurement question
Automated particle counting can be worth considering for a small laboratory when the method fits the measurement task and the full workflow makes sense at the lab’s actual workload. It is not automatically the better purchase, and a low purchase price or a faster demonstration does not establish suitability.
Define six inputs before comparing instruments: the sample matrix, target size range, concentration range, quantity to be measured, intended decision and proposed method. Specify whether the question concerns particles in air, particles in a liquid, features on a wafer surface or viable microorganisms. These are different measurement contexts; evidence for one does not validate another.
A particle count alone does not establish chemical identity, viability or sterility. A result must be interpreted within the capabilities and limitations of the actual method. Ask the responsible technical team to set application-specific requirements before selecting equipment.
Compare complete workflows, not just counting speed
Compare the existing and proposed methods against the same defined task. Consider sample handling, acquisition, review, record management and repeat work as well as the counting stage. An operator-led method can include instrument-assisted measurements, while an automated method can still require human preparation and review.
Data storage, export and review features depend on the instrument, software and configuration. Verify them rather than assuming that every automated counter logs complete records directly. Automatic logging may reduce transcription work, but it does not by itself demonstrate measurement repeatability, accuracy or data integrity.
Request a demonstration using representative samples and predetermined evaluation criteria. Review the configuration, known limitations, unusual results and required operator decisions. Any claimed time or cost saving should be supported by the lab’s own workflow evidence, not a generic percentage.
Build a realistic ownership-cost comparison
Use a consistent evaluation period and obtain current quotations for the relevant configuration. Separate initial costs from recurring costs, include the costs of the existing method, and count each item only once.
|
Cost category |
Questions to include in the comparison |
|---|---|
|
Acquisition and setup |
What are the quoted instrument, accessories, installation and setup costs? |
|
Method evaluation and validation |
What representative samples, reference work and staff time are needed to establish suitability? |
|
Calibration and verification |
Which method-specific services, references, checks and associated labor are required? |
|
Consumables |
Which recurring supplies are needed, excluding anything already counted in another category? |
|
Operating labor |
How much staff time is needed for preparation, operation, review, records and repeat work? |
|
Training and maintenance |
What training, service, repairs and downtime arrangements need to be budgeted? |
|
Data handling |
What software, storage, integration, review and ongoing support costs apply? |
Workload and utilization are inputs to this comparison, not standalone monetary costs. Record expected samples, operating hours, peak demand and idle periods, then relate those inputs to the relevant labor, consumable and service costs. Test how the comparison changes if demand or maintenance needs differ from the initial assumption. Do not assume a universal break-even point.
Check validation and calibration evidence
Ask what evidence supports performance for the intended matrix, size range, concentration and operating conditions. Confirm which reference materials and verification methods are suitable for that particular system. A reference sold for one particle-counting method is not automatically appropriate for another.
NIST’s metrological-traceability guidance distinguishes traceability of a measurement result from fitness for a particular purpose. An appropriate calibration chain matters, but traceability alone does not establish that the uncertainty is suitable for the intended decision. Review the evidence and its limitations, not simply a traceability label.
Prepare a useful supplier brief
Give prospective suppliers the sample matrix, measurement objective, required range, expected workload, record requirements and proposed evaluation criteria. Ask them to identify the exact model and configuration, relevant documentation, current availability and the scope of their quotation. Do not treat a catalog listing as evidence of application suitability or current stock.
For selected Applied Physics products, the technical equipment quote request carries the chosen product variations and quantities into the inquiry. Include the relevant application details, and confirm method suitability with the responsible technical team before purchasing.
Scope: This is an informational purchasing framework, not a validated test method, product endorsement or regulatory-compliance determination. The responsible technical team must determine and validate the method for its actual application before relying on results.
Frequently Asked Questions
Is automated particle counting worth it for a small lab?
There is no universal answer. Define the measurement task, assess the proposed method using representative evidence, and compare complete workflows at the lab's actual workload. Use current quotations and documented labor, consumable, calibration, validation, maintenance and data-handling costs. Workload and utilization are comparison inputs, not separate monetary costs. A purchasing decision should not depend on generic savings or payback claims.
How does automated particle counting compare with manual counting?
Compare methods against the same task and include preparation, acquisition, review, records and repeat work. Automation may change where staff time is spent, but its benefits depend on the method and configuration. Verify logging and export functions; they do not by themselves establish repeatability or reliable results. Assess performance using representative samples and criteria agreed by the responsible technical team.
What calibration and validation evidence should a small lab request?
Request evidence relevant to the sample matrix, target size range, concentration, operating conditions and intended decision. Confirm the calibration chain, reference scope, uncertainty where applicable, verification approach and known limitations. Traceability alone does not guarantee fitness for purpose. Reference materials and checks must suit the actual method; evidence for an airborne counter, liquid counter or wafer-inspection system is not interchangeable.
