ISO/IEC 17025:2017 calibration
Valid through April 30, 2027
Why accurate analytical measurement matters
If your pH meter or conductivity probe drifts, every release decision based on that measurement is suspect. If your spectrophotometer's wavelength accuracy slips, your assay quantitation is off. Analytical instruments are the heart of QC release — when they drift, batches get held.
The cost of a calibration program isn't measured against itself — it's measured against the cost of a recall, a hold, or a deficiency notice.
Allometrics has been performing ISO/IEC 17025 analytical, pH, and spectrophotometry calibration since the standard existed. Our certificates will pass your audits and FDA, USP, and Joint Commission review.
Why Allometrics for analytical, pH, and spectrophotometry calibration
A2LA-accredited under ISO/IEC 17025. Cert 2039.01. Continuous accreditation through every revision of the standard.
Onsite, in your facility. Our field metrologists arrive with NIST-traceable buffer standards, conductivity standards, certified reference materials (CRMs) for density and refractive index, and wavelength references for spectrophotometers. We verify in your QC lab, your pharmacy, your R&D bench.
Replace 3–5 vendors with one accredited partner. Calibration, cleanroom certification, biosafety, and viables — all delivered by the same team under one accreditation chain. Allometrics' integrated compliance service team ensures compliance and helps you pass your audits.
50 years of regulated-environment experience. Founded 1976. The team has lived every USP revision, every FDA cGMP guidance update, every Joint Commission standards change.
Audit-ready certificates that pass FDA, USP, and Joint Commission review
Designed to pass FDA, USP, and Joint Commission audits on first review. Every Allometrics analytical, pH, and spectrophotometry calibration produces a signed, A2LA-traceable certificate built to survive inspection. Each certificate includes:
- Equipment ID, serial number, manufacturer, model, customer asset tag
- Date of calibration, technician, next-due date
- Reference standards used, with NIST traceability chain
- Environmental conditions at the time of calibration
- As-found readings and as-left readings at every test point
- Measurement uncertainty per ILAC P14 / GUM
- Pass/fail determination against your specified tolerance
- A2LA accreditation symbol and Cert 2039.01 reference
Certificate format is designed for FDA inspections, USP <797>/<800>/<825> reviews by state pharmacy boards, Joint Commission MM/EC chapter reviews, ISO 9001 audits, and the metrology requirements of every customer QMS we've worked under.
If your Quality team needs IQ/OQ/PQ documentation for equipment qualification, we deliver it. If you have custom needs for your equipment contact us today.
Equipment we calibrate
- pH meters and pH probes — bench, portable, in-line
- Conductivity / TDS meters — water testing, USP purified water systems
- Spectrophotometers (UV-Vis, fluorometers) — wavelength accuracy, photometric accuracy
- Refractometers — Brix, refractive index, density correlation
- Density meters and densitometers — digital and pycnometer
- Viscometers and rheometers — Brookfield, capillary, vibrational
- Titrators — Karl Fischer, potentiometric, automated
- Moisture analyzers, COD reactors, flash point testers — fuel and chem analytical
- Hydrometers, alcohol hydrometers, pycnometers, Zahn cups — manual analytical references
- DSC, TGA, oxygen analyzers — thermal and gas analytical
Servicing all major manufacturers — Mettler Toledo, Hanna, Hach, Thermo Fisher, Agilent, Anton Paar, Brookfield, Metrohm, Shimadzu, Yokogawa — and many others.
Service modes
Onsite field service — best for active facilities. Our field metrologists come to your facility with NIST-traceable buffer standards, conductivity solutions, CRMs, and wavelength references. We calibrate in place wherever your analytical instruments live.
Cal lab shipping, dropoff, and pickup — best for ultra-precision work. For high-precision wavelength and photometric standards, bring the spectrophotometer to our Webster, TX lab.
Recurring program enrollment — best for multi-site customers. Most analytical instruments need quarterly to annual recertification under USP and FDA programs. Allometrics manages multi-site analytical programs.
Decision shortcuts — start here
Calibration framing for specific environments
If you need analytical, pH, and spectrophotometry calibration for industrial QC labs, refinery process measurement, or trade-certified equipment — see our industrial calibration page for trade-cert considerations, on-demand fail-and-respond service, and refinery hot-work permit logistics.
If you need analytical, pH, and spectrophotometry calibration specifically inside a cGMP-regulated environment — compounding pharmacy, pharmaceutical manufacturing, 503B outsourcing facility, ATMP / cell & gene therapy site — see our cGMP / pharma calibration page for the documentation, USP <1058> equipment qualification level (EQL-1 through EQL-3), IQ/OQ/PQ workflow, and audit-survivable certificate format that pharmaceutical work requires.
A2LA Cert 2039.01 — analytical, pH, and spectrophotometry scope
The full scope, including all other disciplines and supporting comments, is published at a2la.org/accreditation/2039-01.
Download the full A2LA Cert 2039.01 Scope of AccreditationView the full A2LA mass scope (verbatim from the published cert)
Note on accreditation scope:
Allometrics' A2LA Cert 2039.01 is an ISO/IEC 17025 calibration accreditation focused on dimensional, electrical, fluid, mechanical, optical, thermodynamic, and time/frequency measurement. Analytical instruments — pH meters, conductivity meters, spectrophotometers, refractometers, density meters, viscometers, titrators — are calibrated by Allometrics against NIST-traceable certified reference materials (CRMs), buffer standards, conductivity standards, and wavelength references, but this work is not separately listed under the A2LA Cert 2039.01 published scope.
Calibration certificates for analytical instruments include the same NIST traceability chain, the same measurement uncertainty methodology, and the same audit-survivable certificate format as Allometrics' A2LA-accredited scope work. Customers requiring strict ISO/IEC 17025-accredited calibration of analytical instruments should contact us to confirm scope coverage for their specific application.
Allometrics A2LA Cert 2039.01 (ISO/IEC 17025 calibration) is published at a2la.org/accreditation/2039-01. The Allometrics analytical practice, while rigorous and NIST-traceable, sits outside the published cert scope.
Compliance frameworks this work supports
Related
Other calibration disciplines
- Mass & Weighing
- Temperature
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- Dimensional, Humidity, Force & Torque, Time & Frequency, Optical, Vibration
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- All disciplines (calibration hub)