
Confidence in Every Measurement with Expert Chemical Calibration Services
When your lab results, product quality, or regulatory compliance depend on the accuracy of chemical measurements, calibration is essential. At Continental Testing, we provide comprehensive chemical calibration services for a wide range of instruments used in industrial, pharmaceutical, environmental, and research applications. From pH meters to titrators, we help you maintain chemical precision where it counts.
What Is Chemical Calibration?
Chemical calibration is the process of verifying and adjusting instruments that analyze chemical properties (such as concentration, pH, conductivity, turbidity, and other key metrics) to ensure their readings are accurate and traceable. Over time, sensors and instruments can drift due to use, environmental conditions, or chemical exposure. Routine calibration ensures they remain reliable and compliant.
Precision Chemical Calibration Backed by Accreditation

Chemical instruments are highly sensitive. Over time, drift, contamination, and handling conditions can affect accuracy. That’s where accredited calibration makes the difference.
Continental Testing calibrates instruments using traceable standards to the National Institute of Standards and Technology (NIST). We provide certificates with full data, measurement uncertainties, and as-found/as-left values. Every calibration meets the requirements of ISO/IEC 17025:2017, which means your documentation is ready for any audit.
Whether you're sending instruments to our lab or scheduling mobile on-site calibration, we ensure consistency and transparency at every step.
Our Chemical Calibration Services & Capabilities
Chemical calibration ensures that your gas and liquid measurement devices meet the standards required for accuracy, safety, and compliance. Whether you’re monitoring pH in a wastewater facility or verifying gas concentrations in a lab, reliable calibration is essential. Continental Testing offers accredited chemical calibration services for instruments used across critical industries—from environmental labs to petrochemical plants.
With ISO/IEC 17025:2017 accreditation and extensive expertise in both liquid and gas instrumentation, our teams in Ohio and Colorado deliver calibration solutions that help you meet regulatory demands, reduce risk, and stay ahead of deadlines.
What Instruments Do We Calibrate?
Our chemical calibration services include a wide range of instruments that measure properties in liquids and gases. The most common categories we service include:

TOOL & DIE SHOPS

AVIATION

ELECTRONICS MANUFACTURERS

PLUMBING CONTRACTORS

BUILDING CONTRACTORS

INDUSTRIAL MANUFACTURERS

RAIL SYSTEMS

MACHINE SHOPS

ELECTRICAL CONTRACTORS

R&D LABS & MANY OTHERS
ISO ACCREDITED
CHEMICAL INSTRUMENT CALIBRATION, REPAIR, & TESTING


Contact Our Ohio Calibration Lab:
- Address: 104 S. Main Street, Union, OH 45322-3358
- Phone: 1-800-648-5091
- Fax: 937-832-3892
- Hours: Monday–Friday, 8:00 AM – 5:00 PM
What Makes Our Chemical Calibration Services Stand Out?
- ISO/IEC 17025:2017 Accreditation: Our lab procedures, equipment, and training meet strict international standards. That’s peace of mind when you’re facing a compliance audit.
- Full Measurement Data on Every Certificate: We include both as-found and as-left readings, plus measurement uncertainty. Nothing is hidden or vague.
- Multi-Point Calibration: We don’t rely on a single calibration point. Where applicable, we test across the instrument’s range (especially for pH and conductivity meters).
- Included Repairs: Basic adjustments, battery/fuse swaps, and connector replacements are part of our service. We don’t nickel-and-dime you for maintenance.
- Client Portal Access: Every certificate is available digitally. You can retrieve historical calibration data, view upcoming due dates, and print audit-ready documents.
- Fast Turnaround: Lab calibrations typically take 3 to 5 business days. On-site services can be completed in a single visit.
Locations That Serve You
On-site calibration is available in nearby states or by arrangement for national clients. If you're unsure which location to send equipment to, our team will guide you. Continental Testing provides chemical calibration services across the U.S., anchored by two regional labs:
Union, Ohio: Our Ohio calibration lab serves clients in the Midwest and East Coast regions. It is equipped to handle high-volume intake and rush orders.
Brighton, Colorado: The Colorado calibration facility supports calibration clients across the Western U.S. with local logistics and mobile services.
Our Five-Step Aviation Calibration Process
We follow a standardized but flexible process to ensure accuracy, traceability, and turnaround efficiency. Here’s how your instruments move through our chemical calibration workflow:
Quote and Intake: Clients request a quote online or by phone. We provide flat-rate pricing with no hidden fees. Once instruments arrive, we log and tag them, capturing their condition and serial numbers.
As-Found Testing: We record how your instrument performs before any adjustments are made. This “as-found” data helps document any drift or performance changes.
Calibration Against Standards: Our technicians use NIST-traceable reference materials. For example:
- pH meters are tested with certified buffer solutions (e.g., pH 4.01, 7.00, 10.01).
- Gas monitors are calibrated using verified gas blends at known concentrations.
- Conductivity meters are checked using certified standard solutions at multiple points.
Adjustments and Repairs: If we find that an instrument is out of tolerance, we’ll perform minor adjustments. That includes cleaning probes, replacing batteries, or adjusting internal settings—at no extra charge.
As-Left Results and Certification: After recalibration, we test again and document the “as-left” results. We then issue a digital certificate that includes:
- Serial number
- Calibration date
- Next calibration due
- Measurement data and uncertainty
- Technician and lab information
Return Shipping or Pick-Up: We return your calibrated instruments with stickers and documentation attached. You’ll also receive digital access through our secure client portal.

