Repair & Calibration TX Division


Ludlum Measurements, Inc. offers a full service repair and calibration department. We not only repair and calibrate our own instruments but most other manufacturers' instruments as well. Repair estimates are offered at no cost. Repair and modification charges are based on material cost plus labor. Labor rates are billed for actual time at the rates shown below.

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.


Return Goods Form

Proper documentation is mandatory. We require (1) an email or fax of the appropriate Return Goods Form(s) (see below) prior to shipment and (2) a copy shipped with the instrument(s). If appropriate documentation is not included then the desired service will be delayed until such time as the proper paperwork is received.
If an instrument is sent for repair, we will determine the problem and contact you with an estimated cost before beginning any work. If an instrument sent for recalibration has an issue that requires repair, we will advise you before any repair work is performed.

Instrument Return Form - USA (pdf format)

Instrument Return Form - International (pdf format)

Instrument Return Form - International - Spanish (pdf format)

(Download and view forms in Adobe Acrobat Reader to fill out)

Ship To

Ludlum Measurements, Inc.
Attn: Repair and Calibration 501 Oak Street
Sweetwater, Texas 79556 USA

Voice: (325) 235-5494

Fax: (325) 235-4672

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All prices listed below are for LMI Instruments only. Call for pricing for other manufacturer's instruments.

Repair Rates

LABOR TYPE LABOR RATE/HOUR (see notes below)
Technician $100.00
Engineering $175.00
Machine Shop $100.00

Calibration Fees


Standard Calibration

  • As found readings
  • Two points per range
  • One detector (see below for additional detectors)
  • NIST Traceability
  • ANSI N323 Compliance
Each additional detector: $15.00

Specialized Calibration


  • Standard Calibration
  • Any special customer requirement, i.e. extra
    sources, source efficiencies, etc.

Neutron Instrument

  • 241AmBe source utilized
Model 2241 Scaler/Ratemeter Series $80.00
Stretch Scopes $100.00
Pulsers $80.00
Simultaneous Alpha/Beta Meters $80.00
Data Loggers $100.00
Sample Counters
Model 9DP Family $125.00


  • All prices are domestic only. Contact us for overseas prices.
  • All prices are for LMI instruments only.
  • Exposure rate calibrations are performed using a 137Cs source.
  • Typical turnaround times are 3 - 5 working days for calibration and 7 - 10 working days for repairs.
  • Return Material Authorizations (RMAs) are not required.
  • Prices are subject to change: contact LMI for current pricing.

Other Authorized Service Centers

South West Rad Tech Services - Southwest U.S. Service Center
LMI Calibration Dept. Tennessee Division - Knoxville, Tennessee USA