Facilities & Environments

Particle Monitoring in Data Centers

Compare airborne and deposited particles across data halls to understand where contamination accumulates and what to investigate next.

ARE Labs helps facility teams plan representative sampling, analyze collected material, and report results by location with clear limits on interpretation.

ISO 17025ISO 14644-9ISO 16000-34ASHRAE datacom guidanceReviewed 2026-10-02
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Investigating particles in data centers

A data center particle study starts with the decision the facility needs to make: establish a baseline, compare zones, investigate a visible deposit, or assess a change in operating conditions. Airborne measurements and material collected on surfaces answer different questions. ARE Labs chooses locations, exposure periods, media, and analyses accordingly, drawing on ISO 16000-34, ISO 14644-9, and ASHRAE datacom guidance where each applies:

  1. Baseline surveys use ISO 16000 Part 34 context to compare airborne particle conditions among selected halls, airflow zones, and operating periods.
  2. Surface investigations use ISO 14644 Part 9 context to compare deposited material at floor, equipment-height, and overhead positions without claiming an air cleanliness class.
  3. Maintenance evaluations use ASHRAE datacom guidance to frame before-and-after sampling around a documented cleaning, filtration, or airflow change.
  4. Follow-up analysis uses ISO 17025 quality-system records to connect sample custody, gravimetry, microscopy, and optional elemental work to the facility question.

One facility average can obscure differences between locations. We record each sample's position, duration, handling, and operating context so the report separates measured differences from possible explanations. ARE Labs can collect samples in the field or analyze media deployed by a facility team under an agreed plan.

Tests that support a data center investigation

The study question determines whether to measure airborne particles, deposited material, or both. These testing paths help define collection methods and the level of analysis before a facility commits to a monitoring period.

Test method options

MethodStrengthsTradeoffAligned with
Location-based field sampling plan
  • Maps representative halls, airflow zones, elevations, and operating periods before media are deployed.
  • Pairs airborne and surface collection only when both measurements serve the facility decision.
Access, exposure duration, and operating conditions must be coordinated before collection begins.
ISO 16000-34
Surface deposition and microscopy
  • Gravimetry compares mass deposited per area and per exposure period across selected positions.
  • Optical microscopy documents counts, selected size bins, and visible particle features.
Deposited-material results alone do not establish airborne concentration, composition, or a unique source.—
Submitted samples and follow-up analysis
  • Facility teams can deploy approved media under a documented plan for laboratory analysis.
  • Optional SEM-EDS adds morphology and elemental information when composition is a separate project objective.
Interpretation depends on documented placement, handling, custody, blanks, and suitable reference material.—

Setup configurations

Choose sampling positions before deployment so each result represents a known part of the facility. ARE Labs can collect samples, or a client or consultant can collect them using supplied instructions. Either way, record location, elevation, exposure timing, blanks, handling, and operating notes under the same sample identifiers used in the laboratory report.

Locations & elevations

Select data halls, floor positions, equipment-height structures, overhead spaces, and airflow zones that answer the comparison question.

Collection window

Set exposure duration around representative facility operation and record maintenance, traffic, and equipment changes that may affect interpretation.

Media & analysis

Match deposition slides, filters, wipes, or collected particles to gravimetry, optical counting, microscopy, or optional SEM-EDS endpoints.

Controls & custody

Agree on blanks, packaging, shipment, receipt checks, and collection responsibility before samples leave the facility.

Guidance matched to the measurement

The quality system and study-specific references serve different purposes. During protocol development, we identify which guidance applies to the selected sample, the measurement, and the question the report needs to answer.

  • ISO 17025AccreditedLaboratory quality-system context; confirm the analytical scope for the project.
  • ISO 14644-9AlignedSurface particle cleanliness context where the collection design fits.
  • ISO 16000-34AlignedIndoor airborne-particle measurement strategy where air sampling is included.
  • ASHRAE datacom guidanceAlignedData center particulate monitoring and prevention context.

Key data outputs & reporting

The report helps facility teams compare locations while keeping observations separate from unsupported source or risk claims. Depending on scope, it can show airborne particle concentrations, gross mass per area, exposure-normalized deposition rates, coarse visible-particle counts, microscopy size bins, and representative images. Each result is linked to its sampling position, collection period, units, controls, and limitations. Elemental findings appear only when separately requested and measured.

Primary outputs

  • Location-based mass per area and deposition rates for collected surfaces.
  • Airborne concentration and size-bin records when optical counting is scoped.
  • Microscopy counts, selected size distributions, and representative images.
  • Optional SEM-EDS spectra or maps for selected particles or regions.

Deliverables

#FormatContents
01Technical reportStudy plan, results, controls, deviations, and interpretation limits.
02Location plotsComparable zones, elevations, and operating periods with stated units.
03Data tablesSample identifiers, measurements, and calculations when included in scope.

QA / QC & data integrity

Facility particle data depend on where a sample was placed and how it was handled. The protocol records exposure dates, location, elevation, operating conditions, and collection responsibility. Laboratory records link each reported result to receipt condition, calibration or instrument checks, blank results, calculations, exclusions, and review. We document any change to the plan so comparisons remain interpretable.

Unique identifiers connect each sample to its facility position, exposure period, handling record, and requested analyses.

Unexposed media and blanks help reveal handling or analytical background without automatically becoming a subtraction correction.

Balance and particle instruments receive calibration or performance checks appropriate to the selected method.

The report distinguishes whole-slide counts from microscope-field measurements and states exclusions and measurement limits.

Interpretation separates measured location differences from hypotheses about source, transport, or equipment impact.

RESEARCH / THIS WORK IN PRACTICE

Real studies. Measured evidence.

Explore published studies connected to data centers. Each explains the study question, approach and findings.

View related studies (1)
Aerosol Characterization

Data Center Particle Deposition: Surface Contamination

The client needed a measured baseline for surface particle accumulation across operating spaces, with enough spatial detail to compare buildings, halls, and sampling heights.

Selected finding
Across 123 primary slides, mean and median mass deposition rates were 14.7 and 7.5 mg/m²/day.
Related context

An anonymized surface-deposition study illustrates how location-based collection and laboratory analysis can support data center contamination questions.

Data centerParticle depositionField study

Study-specific findings do not guarantee performance for another product.

Why ARE Labs

ARE Labs connects technical topics to practical study design, method selection, controlled aerosol work, and reportable evidence without turning technical pages into sales pages.

Reviewed byJamie Balarashti (25 yrs - cascade & inhalation methods) - Weston Schaper (7 yrs - real-time sizing & nanoparticle work)
QualityDocumented study records
900+Studies Performed
17+Years in operation
300+Clients supported

Common questions

Facility teams often know where dust is visible but need a sampling plan that makes measurements comparable. These answers explain what to define before collection, who can collect samples, and what surface or airborne results can establish. After the first investigation, the analytical plan can be narrowed or expanded, provided the report remains clear about the limits of each measurement.

Q.Can our team deploy the collection media?
A.Yes. ARE Labs can supply an agreed plan and media requirements for client- or consultant-led collection. Placement, exposure timing, blanks, handling, and custody must be documented for laboratory interpretation.
Q.What is the difference between airborne and deposited particle measurements?
A.Airborne counting describes particles in sampled air at a particular time and location. Deposition media show what accumulated on a defined surface over an exposure period. One does not substitute for the other.
Q.Can the results identify the contamination source?
A.Location comparisons can guide a source investigation, but they do not identify a unique source by themselves. Reference samples, operating history, and additional particle characterization may be needed.
Q.Can a surface study assign an ISO air cleanliness class?
A.No. A surface-deposition result describes collected material, not airborne particle concentration. Any air classification question needs a separately scoped airborne measurement and applicable criteria.
Q.Where can we see an example of the reporting?
A.The linked data center case study shows an anonymized, approximately week-long surface-deposition program, location comparisons, microscopy results, and a downloadable public report.

Standards & guidance

No single test covers every data center particle investigation. ISO 16000-34 informs representative indoor airborne-particle measurement, while ISO 14644-9 provides context for surface-particle cleanliness. ASHRAE datacom guidance addresses monitoring, prevention, and control in these facilities. ISO 17025 concerns laboratory competence and the quality system. We document which reference applies to each selected measurement rather than treating the whole study as a single accredited method.

QA & Regulatory - Accredited

ISO 17025

Laboratory competence, controlled methods, records, and reportingView standard ->Particles, Devices & Exposure - Aligned

ISO 16000-34

Representative measurement strategy for airborne particles indoorsView standard ->

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