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Raman Spectroscopy - Advanced optical analysis technology



Endress + Hauser Logo

Endress+Hauser has the broadest, most advanced instrumentation product basket on the market, including Level, Flow, Analytical, Pressure, Temperature and more.

Samson logo

SAMSON is a leading manufacturer of control valves including Globe, Rotary and Severe Service.


Phoenix Contact is a world leader in electrical connection, electronic interface and industrial automation technologies with a mission to create progress through innovative and inspiring solutions.

Clark Reliance Corporation logo

Clark-Reliance manufactures a wide range of products including level indicators, magnetic level gauges, flow indicators, and gauge glasses under brand names such as Jerguson and Jacoby-Tarbox.

Dräger’s complete portfolio of fixed gas detectors includes an extended range of toxic, flammable and oxygen monitors that interface seamlessly with our range of control systems and other components, even third-party devices.


Max-Air Technology is the worldwide leader in automation technology and process control products; they design automation technologies that provide competitive advantages.



Since 1952, Miller Mechanical has been the trusted adviser to Midwestern manufacturers for solutions to their measurement and control challenges. We help process industries - Food & Beverage, Chemical, Biofuels, Water/Wastewater and more - to improve efficiency, maintain quality and reduce their risk of down-time.

We are a sales representative for several of the most respected brands of process automation equipment, including Endress+Hauser, SAMSON, Draeger and Clark-Reliance.


We serve Iowa, Minnesota, Nebraska, North Dakota, South Dakota, Northwest Wisconsin and Western Illinois with a team of instrumentation and control engineers spread across the area. Our main offices are in Des Moines, Iowa and Minneapolis, Minnesota.






Year Established



Customers Served

“Working with MMS has been great for us as a customer. The willingness from MMS to help out on a moment’s notice is a game changer in the field. I know when I call MMS, I can expect to have excellent service.”

— Kyle Vriezelaar, Renewable Energy Group

Renewable Energy Group Logo

“I have used Miller Mechanical Specialties on many different jobs in the last three years and have found the crew to be very knowledgeable in the water/wastewater industry with customer service that is second to none! I would highly recommend their services on any project large or small.”

— Mike Trujillo, Integrated Process Solutions

Integrated Process Solutions Logo




Service technician installing flowmeter
Endress+Hauser flowmeter calibration service trailer
Service technicians completing control valve repair

Startup & Commissioning

Make startup easy and extend your factory warranty

Our factory-trained service technicians are capable of providing field start-up and commissioning of instruments, valves and gas detectors.

Instrument Calibration

Ensure accurate and reliable measurements

On-site or factory calibrations for flow, temperature and pressure instruments, and gas detectors with clear and concise calibration certificates.

Valve Repair

Improve control and eliminate leaks

Our factory-trained technicians are capable of repairing valves up to 8 inches in size at our shop in Des Moines, Iowa.

Biogas System Maintenance

Maintain safe operations

Our professionals come to you to do inspection and service of flare system ignition panels, flares, thermocouples, and both mechanical and electrical fail safes, as well as any related meters and gauges.




For any inquiries, questions or commendations, please call 515-243-4287


or fill out the following form

Get a quote: 515-243-4287

Des Moines Office

510 Murphy St
Des Moines, IA 50309

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Minneapolis Office

1200 Centre Pointe Curve
Mendota Heights, MN 55401


To apply for a job with Miller Mechanical, please send your resume and a short introduction to:

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