InstroTek, Inc.

Grand Rapids, MI



Our goal is to better serve our customers throughout the Midwest region.  InstroTek has built a solid, long-standing relationship with our customers based on top-notch customer service, attention to detail and an excellent service department.

Our People


Michael Lockwood is the Service Manager at our Grand Rapids location and has been calibrating and servicing gauges for InstroTek since December 2011. Michael grew up in McBain, Michigan and graduated from ITT Tech with an Associates Degree in Electronics Technology.
Sean Mullennix is our Electronic/Calibration Technician at the Grand Rapids location and has been with InstroTek since 2015. A Grand Rapids native, Sean graduated from ITT Tech and has two sons. He enjoys camping, fishing and boating.



What We Offer


  1. Full 3 and 5 Block Nuclear Gauge Calibrations Using NIST traceable calibration blocks and meeting ASTM D6938, D2950, D7013 and AASHTO T310 requirements for Nuclear Gauge Calibration and Verification.
  2. NCAT Service and Maintenance
    Our Grand Rapids office has an NCAT Factory Trained Technician along with an inventory of parts for all of your NCAT needs!
  3. No Hassle Shipping Call today to have us prepare your shipping documents. We will fax or e-mail all the documents to you along with scheduling the pick-up.
  4. Fast Turnaround InstroTek has always been the leader in fast turnaround times. We know that the sooner you receive your gauge back from us, the sooner you can utilize your gauge out in the field.



Our Promise


No Hidden Costs!
At InstroTek, you will be charged only for basic service and calibration. If your gauge requires any repairs, you will be contacted first and with your consent the repairs will be done using the highest quality parts at the lowest cost to you.

Superior Technical Service
At InstroTek, only the most qualified factory trained technicians will be servicing and calibrating your nuclear gauges.

A Friendly Representative Every Time You Call!
You do not have to talk to an answering service or recorded message! InstroTek, will always have a qualified and friendly voice on the telephone to answer your questions.


InstroTek, Inc. - Grand Rapids, MI is an accredited ISO 17025 laboratory 


4495 44th Street SE, Suite A, Grand Rapids, MI 49512

(616) 726-5850