DFT Gage Calibration & Certification (Dry Film Thickness)

When coating thickness matters, your DFT gage needs more than a checkbox. We provide verified performance, documented readings, and a traceable calibration certificate so your measurements stand up to job specs, quality audits, and customer requirements.

Request Calibration / Get a Quote  |  Call: 1-800-582-4243

Why Calibration?

Most coating specifications don’t just care that a gage powers on—they require you to demonstrate that the instrument was calibrated correctly and is being verified routinely during use. Commonly referenced procedures include ASTM D7091 and SSPC-PA 2, and many programs also align to ISO 19840.

What You Get

  • Certificate of Calibration with documented results and traceability.
  • As-found / as-left data when applicable (before/after results)
  • Functional check (probe/sensor condition and basic performance checks)
  • Calibration label and recommended next due date

Important: A certificate supports compliance, but most procedures still require routine verification during use (daily/shift checks, after drops, after temperature swings, or when readings look suspicious).

Calibration vs Verification vs Adjustment

Calibration: Controlled comparison to known standards to determine performance and document results (your certificate).

Verification: Routine field check using certified standards/shims to confirm the gauge is reading correctly today.

Adjustment: Changing the gauge’s measurement characteristics to bring it back within tolerance (only when needed and documented).

Supported Standards & Typical Use Cases

  • ASTM D7091 (DFT measurement using magnetic induction / eddy current methods)
  • SSPC-PA 2 (DFT measurement procedure and acceptance on steel)
  • ISO 19840 (guidance commonly referenced for protective coatings thickness)

If your QA program references ISO/IEC 17025, we can align documentation expectations so your audit trail is clean (traceability, controlled standards, documented results, and clear labeling).

DFT Gauge Types We Calibrate

  • Magnetic induction gauges (steel substrates)
  • Eddy current gauges (non-ferrous substrates)
  • Dual-technology gauges (auto-detect substrate)
  • Integral probe and separate probe configurations

Not sure what you have? Send the model number(s) (or a photo) and we’ll confirm compatibility.

Turnaround Times

3-5 Business Days on Average

How to Send Your Gauge

  1. Pack the gauge + probe securely (include accessories if readings are abnormal).
  2. Include your company name, contact information, return address.
  3. Ship it! Once received, we evaluate, test, and note any issues for discussion.

Request a Quote Call: 1-800-582-4243

FAQ

How often should a DFT gauge be calibrated?

Most manufactureres recommend annual calibration, but the right interval depends on usage, specification requirements, environment, and QA requirements. Even with annual calibration, routine verification during use is still recommended/required in many procedures.

Does calibration mean I don’t need to verify in the field?

No. Calibration confirms performance at the time of service. Verification helps ensure the gauge remains accurate after handling, environmental changes, or impacts.

What’s the difference between a “certificate of conformance” and a certificate with readings?

A stronger certificate documents actual readings taken on standards (often called “long form”). This is typically more useful for QA programs than a generic conformance statement.

Can you calibrate my gauge to ASTM D7091 / SSPC-PA 2?

Those standards guide measurement practices and accuracy management. We calibrate the instrument and provide documentation that supports compliance; your field process should still follow the standard’s verification and measurement procedure on the job.

Do I need certified shims or standards too?

If you verify in the field (recommended), certified shims/standards are commonly used to support routine verification.

Ready to Calibrate Your DFT Gauge?

Send your model number(s), quantity, and desired turnaround. We’ll confirm scope, pricing, and next steps.

NIST Equipment Calibration Form.

All Fields Required.

Name
Please let us know what equipment you will be sending in for calibration.

Orders are normally turned around within 5-7 business days for calibration.