Calibration Dept. Tennessee Division



This facility will ensure instrument owners in the Tennessee region will receive the same quality calibration service as provided by our factory. The Tennessee Division will be calibrating using methods in accordance with ANSI N323-1997, and as recommended by our factory in Sweetwater, TX. Sources used for calibration are traceable to the National Institute for Standards and Technology (NIST).

ISO/IEC 17025 Certification

a2la ilac mra combo logo

Our Calibration Departments in both Sweetwater, TX and Knoxville, TN have been accredited by A2LA (American Association for Laboratory Accreditation) in accordance with the ISO/IEC 17025:2005 standard, as well as the ANSI/NCSL Z540-1-1994 standard. Read more.



 Phone Numbers

  888-426-2388 ; 865-392-4601


 Instrument Return Form

Please do not return an instrument without an Instrument Return Form. The Instrument Return Form connects your instrument with all the necessary information to expedite handling and proper return of your instrument. (Download and view form in Adobe Acrobat Reader to fill out.) When possible, please include your Purchase Order Number on theInstrument Return Form. We cannot begin work on your repair unless we have a PO. Completed Instrument Return Forms may be submitted to the

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 Ludlum Measurements, Inc.
 Calibration Department Tennessee Division
 10744 Dutchtown Road
 Knoxville, TN  37932


Range at Protean web


The Ludlum Measurements Tennessee Calibration facility offers factory calibrations on all handheld Ludlum Measurements, Inc. models, excluding models in the 78 series, and Neutron instruments. The Tennessee Division also offers repairs of Ludlum Measurements, Inc. models, along with calibration of select models from other manufacturers. If you have a question about the calibration or repair capabilities we encourage you to contact our Tennessee division calibration department with you inquiry. See contact information above.