A single miscalibrated air sampler can invalidate months of environmental monitoring data. When your CFU counts don’t align with historical trends and auditors start asking questions about your sampling equipment, you need more than calibration stickers—you need measurement certainty backed by defensible documentation.
Allometrics delivers NIST traceable air sampler calibration services that give quality managers confidence in their microbial monitoring data. Our laboratory-based calibration process verifies volumetric airflow using calibrated reference standards, ensuring your samplers collect at the precise airflow rates that validate your cleanroom classifications and sterile manufacturing processes.
Since 1976, we’ve supported pharmaceutical manufacturers, biotechnology labs, compounding pharmacies, hospitals, and medical device facilities facing FDA inspections, USP compliance requirements, and ISO cleanroom certifications. Our comprehensive calibration certificates provide the measurement traceability and documented evidence your quality system demands—because when auditors question your environmental monitoring data, your calibration records need to demonstrate technical defensibility, not just checkmarks on a form.
Industries That Depend on Accurate Air Sampling
Air sampler calibration supports environmental monitoring programs across regulated industries where microbial contamination control and cleanroom integrity are non-negotiable.

Pharmaceutical Manufacturing: Sterile drug production facilities rely on calibrated air samplers to validate aseptic processing environments, monitor Grade A/B cleanroom classifications, and demonstrate ongoing environmental control during FDA inspections. Your microbial monitoring program cannot provide defensible data without verified sampling accuracy.
Biotechnology and Research: Biopharmaceutical production, cell culture laboratories, and research facilities conducting work with biologics require precise air sampling for contamination detection. Calibrated equipment ensures your viable particle monitoring reflects actual environmental conditions, not measurement error.
Compounding Pharmacies: Hospital and retail compounding pharmacies must meet USP 797 and USP 800 environmental monitoring requirements. Regular air sampler calibration demonstrates your commitment to maintaining ISO Class 5, 7, and 8 environments where sterile preparations are compounded.
Healthcare Facilities: Hospital pharmacies, surgical suites, and specialty procedure rooms use air sampling to verify environmental controls. Calibration provides the measurement confidence needed when patient safety depends on contamination-free environments.
Medical Device Manufacturing: Facilities producing sterile medical devices face stringent cleanroom requirements under FDA QSR and ISO 13485. Calibrated air samplers support validation protocols and routine environmental monitoring that prove manufacturing environments remain under control.
Cleanroom Operations: Facilities maintaining ISO 14644-classified cleanrooms for sterile manufacturing, aseptic processing, or contamination-sensitive production rely on accurate air sampling for environmental monitoring. [1] Calibrated samplers verify that your controlled environments meet classification requirements and operational specifications.

Why Quality Managers Choose Allometrics for Air Sampler Calibration
When your environmental monitoring data faces regulatory scrutiny, your calibration provider becomes part of your quality defense. We’ve built our reputation on delivering more than certificates—we provide the technical competence and documentation integrity that withstand audits.
NIST Traceable Measurement Standards: Our laboratory calibration process uses reference equipment with direct traceability to the National Institute of Standards and Technology. Every airflow measurement connects to recognized national standards through documented calibration chains, giving your data the measurement authority regulators expect.
Over 50 Years of Metrology Experience: Since 1976, we’ve calibrated laboratory and manufacturing equipment for facilities where precision matters. That depth of experience means we understand the relationship between airflow accuracy and collection efficiency—and how calibration intervals affect your environmental monitoring program’s reliability.
Comprehensive Calibration Documentation: You receive detailed certificates showing as-found and as-left conditions, measurement uncertainties, environmental conditions during calibration, and complete traceability documentation. When auditors review your calibration records, our certificates demonstrate technical rigor, not just compliance checkboxes.
Nationwide Service: We provide NIST traceable air sampler calibration from our Webster, Texas laboratory serving facilities across the United States. Standard turnaround is 7-10 business days, with expedited 48-hour service available when your monitoring schedule demands faster delivery.
Understanding Air Sampler Calibration Benefits
What is Air Sampler Calibration?
Air sampler calibration verifies that your equipment measures airflow accurately under your actual operating conditions. [2] The process compares your air sampler’s readings against a reference instrument that has been calibrated to NIST traceable standards and proven to be more accurate than your device.
Our laboratory documents whether your equipment performs within the manufacturer’s accuracy specifications—confirming that the flow rates your sampler reports are correct and your environmental monitoring data is valid.
Benefits of Regular Air Sampler Calibration
Reliable Environmental Data: Calibrated samplers provide accurate microbial counts that support cleanroom classifications, contamination investigations, and process validations. Your data withstands regulatory scrutiny when equipment performance is documented.
Regulatory Compliance: USP 797, ISO 14644, FDA cGMP and other GMPs require documented equipment calibration. Certificates demonstrate your measurement systems remain suitable for environmental monitoring throughout their service life. [3]
Early Problem Detection: Calibration identifies equipment drift before complete failure, preventing the costly discovery that you’ve collected weeks of potentially invalid monitoring data.


Risks of Neglecting Air Sampler Calibration
Invalid Monitoring Data: Uncalibrated samplers generate questionable CFU counts that cannot support cleanroom classifications or contamination control decisions. When airflow drifts outside specifications, regulators will question your entire environmental monitoring program.
Audit Findings: Missing or expired calibration records consistently trigger FDA observations and GMP deficiencies during inspections—findings that can delay product releases and damage your quality system’s credibility.
Expensive Investigations: Discovering calibration problems after the fact means potentially invalidating batches, repeating validation studies, or conducting investigations to determine if equipment affected product quality.
Schedule Your Air Sampler Calibration
Protect your environmental monitoring data with NIST traceable calibration services. We’ve supported pharmaceutical, biotechnology, healthcare, and manufacturing quality programs since 1976.
Our laboratory calibration service includes:
- NIST traceable certificates
- Standard 7-10 day turnaround (expedited 48-hour available)
- Comprehensive documentation for regulatory audits
- Nationwide service via secure shipping
Call now to discuss your air sampler calibration needs, schedule service, or request a quote. Our calibration specialists understand USP compliance, FDA requirements, and the documentation quality managers need for successful audits.
