Proto Calibration Services
Industrial torque wrenches built for hard service — and calibrated for the records behind it.
ACS Calibration delivers NIST-traceable, audit-ready calibration for Proto instruments, available at the ACS central lab or directly on-site at facilities across the Southeast — with ISO/IEC 17025 accredited certificates available on request for instruments on our accredited scope.
Popular Proto Equipment We Calibrate
The service pages below cover the categories Proto instruments most often fall into.
More brands we service: Snap-on, CDI, and Sturtevant Richmont — plus dozens more.
Proto Equipment, Calibrated With Data
Proto industrial torque wrenches and multipliers work heavy trades — energy, rail, plant maintenance — where fasteners are big, torques are high, and the consequences of under-torque are structural. Hard service accelerates drift, and high-torque work leans on our NIST-traceable coverage up to 750 ft·lb.
We calibrate Proto torque tools under our accredited scope through 250 ft·lb and NIST-traceable beyond, with as-found and as-left data per tool — fleet batches aligned to one recall date.
ACS Calibration is an independent ISO/IEC 17025 accredited calibration laboratory. We are not affiliated with, sponsored by, or endorsed by Proto; brand names are used solely to identify equipment we service.
What You Get With Every Calibration
- NIST-traceable calibration certificate with real measurement data — not just a pass/fail sticker
- As-found and as-left readings, so drift is documented
- ISO/IEC 17025 accredited certificate with reported uncertainty — on request
- Calibration label with due date, plus a reminder before your next calibration is due
Why Companies Choose ACS for Proto Calibration
NIST-Traceable, Accredited on Request
Every calibration is NIST-traceable with real measurement data, and ISO/IEC 17025 accredited certificates are available on request for instruments on our accredited scope.
4–6 Business Day Typical Turnaround
Keep production moving. Most instruments are typically completed in 4 to 6 business days from arrival, with rush options available when a line is down.
Flexible Logistics
Mail your instruments in, or schedule onsite calibration and we come to your floor — serving Alabama, Florida, Georgia, Mississippi, Tennessee, South Carolina, and beyond.