NIST researchers have developed the Electronic NIST Torque Realizer (ENTR), a portable device that can calibrate torque wrenches on-site, eliminating the need to ship tools to distant laboratories. The ENTR uses rare‑earth magnets and electronic components to generate measurable torque, with an accuracy of 1 newton‑meter. The device is currently being tested at Nellis Air Force Base in Nevada and will be produced in larger numbers in partnership with Snap‑on Industrial, a tool manufacturer that supplies the U.S. military. By allowing local calibration, the ENTR could reduce the frequency of equipment checks and lower maintenance costs while maintaining the traceability required by Air Force standards. The technology also has potential applications for commercial aircraft and automotive manufacturers.
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