in lab Calibration

Inside of our environmentally controlled, ISO/IED 17025 certified and A2LA accredited laboratory, a team of highly-skilled metrology professionals use state-of-the-art equipment for dimensional calibration of gage and measurement instruments and mechanical calibration of test equipment.

The calibration of high precision gauges requires a temperature and humidity controlled laboratory like the one housed at our A.A. Jansson headquarters where we can control the environment and increase the precision of our calibrations. A.A. Jansson has three calibration laboratories, each with its own temperature and humidity requirements. The appropriate laboratory is used for your specific needs, in order to achieve the optimum results you expect.

At A.A. Jansson, our service-oriented professionals are among the most highly qualified calibration personnel in the country. Each of our calibration specialists have received extensive, individualized training on the different processes involved in the calibration process. Our operating philosophy clearly states, "At A.A. Jansson, we take care of the measurements needs of our customers" and we deliver on that promise every day.

A.A. Jansson's Laboratory is accredited in accordance with recognized International Standard ISO/IEC17025:2005. We also meet the requirements of ANSI/NCSL Z540.

Metrology is the science of measurement. A standard is an object that represents a unit of measurement. Therefore metrology standards are objects that serve as a fundamental reference for measurement against which all other measuring devices are compared.

Metrology standards have been the foundation of measurement from the beginning of time and are as important to the calibration process as it is to the manufacturing process, serving as the fundamental standard that insures the interchangeability of parts.

Because of the importance these standards are to your company, A.A. Jansson strives to be the best in the industry in meeting your expected goals. We take all measurements in our controlled laboratory, which are traceable to NIST. We use consistent methods to obtain the most precise measurement results. When needed, measurements are adjusted for temperature, and deformation, insuring the dimensional requirements of your measuring and manufacturing process.

  • Gage Blocks
  • Ring Gauges
  • Gage Balls
  • Precision Spheres
  • Gear Wires
  • Length Standards
  • Drill and Reamer Blanks
  • And more...

Glass inspection masters are common in the calibration industry and are used for the calibration of Optical Comparators, Microscopes, and Video Inspection Systems. Glass Inspection masters are used to calibrate and improve the accuracy of the staging systems on numerous types of optical inspection systems. In addition to calibrating the length characteristics of a measuring instrument they can also be used to determine magnification accuracy and Field of View Accuracy (F.O.V.) of the optical image.

A.A. Jansson's sub-micron optical inspection system can calibrate you masters with micron accuracy. Contact us today to learn more about our Glass Inspection Masters calibration capability.

  • Linear Scales
  • Magnifiers
  • Micro-rules
  • Loupes and Comparators
  • Stage Micrometers
  • Reticles
  • Magnification Rules
  • And more...

Precision Hand Tools are used in every calibration laboratory and on every shop floor in the world. These are the measuring instruments that get the job done. Therefore it is important to maintain there working condition and proper calibration. A.A. Jansson calibrates all types of dimensional hand tools to help maintain your quality manufacturing process.

When people think of Gage Blocks they think of A.A. Jansson, and for good reason. The Lundquist family started A.A. Jansson back 1961 with the sole purpose of manufacturing gage blocks.

C.E Johansson, the "Father of Measurement", developed and manufactured his first set of gage blocks in the late 1800's. He developed and began manufacturing from his home in Eskilstuna Sweden. Working alongside of him were our forefathers, Sven and Victor Lundquist. Sven Lundquist brought his family and knowledge to Dearborn Michigan in the 1920's, to manage the Ford Motor Johansson Gage Block Division. Sven's Grandsons Arne and Eric started A.A. Jansson in 1961, following in the family tradition of manufacturing and calibration of gage blocks. With five generations of experience you can be assured that the calibration performed at A.A. Jansson comes with the upmost precision in the industry.

The most important feature of a gage block is that it can be joined together with little dimensional error. The process used to join blocks together is called wringing. By sliding two gage blocks with ultra-flat surfaces together the blocks will cling thus creating additional size blocks. An 81 piece gage block set in conjunction with the wringing process, can create thousands of dimensional sizes.

However, blocks will not wring if the surfaces are not flat. At A.A. Jansson each gage block is finely lapped during the calibration process to improve the gage surfaces, enhancing the blocks wringing characteristics. After all, what good is a gage block that doesn't wring? A.A. Jansson the only gage block calibration laboratory in the industry that will actually improve the condition of the gage block during the calibration process.

We check all blocks are for deviation and variation in length. We determine deviation by measuring a specific length across the gage surface and measure at least four additional locations to determine the variation in length of the complete gauging surface. This helps insure the parallelism of the gauging surface



Few things are more important than achieving proper torque. The assembly process requires the proper torque ratings for fasters. The proper torque is extremely important. When accurate torque is not applied to the bolts and nuts, they wear out quickly and can cause failure. Torque settings are designed into the manufacturing process to assure maximum life of a product, enhance safety, and improve performance.

If not performed correctly, product failure and poor performance can occur. Depending on the type of application and the type of failure, the result could even cause death. Either way, inaccurate torque can be very costly to a manufacturer. Make sure your torque wrenches and drivers are providing you accurate torque settings. At A.A. Jansson, we can calibrate your torque wrenches and drivers from 4 in. lbs. up to 600 ft. lbs.

Thread wires are used to measure pitch diameters of external threads. Gear wires are used to check tooth thickness of gears at the pitch diameter. Thread wires include a set of 3 wires and gear wires come in sets of two. Both wires are manufactured and held to extremely tight tolerances.

Unlike most calibrations, results are reported and corrected for zero deformation thread and gears wires are calibrated and reported with deformation built into the process. Most calibration laboratories do not understand this important calibration process.

At A.A. Jansson, we will calibrate your wires taking into account the appropriate force that is utilized in the required standards.In addition to calibrating working wires A.A. Jansson will also calibrate master wires.