To safeguard people and processes for a better world

When Dick Henszey took over The Henszey Company that was founded in 1924, he renamed it Sentry Equipment because the company “guarded” material integrity and boiler systems against corrosion. That, with five employees and a bold vision, has grown into a global enterprise of 180 employee-owners who serve customers in over 50 countries across six continents. We deliver true representative sampling and analysis techniques to our customers, empowering them to accurately monitor and measure processes for improved production efficiency, output and safety. Standing behind our commitments, we are determined to tackle any application, anywhere.

We know that running an efficient operation isn’t easy. It requires thorough, careful analysis of controlled, real-time data achieved through reliable, accurate and repeatable process monitoring and measuring. Our products and services effectively condition, sample and measure gas, liquid, slurry, powder, solids, steam or water to help our customers obtain the critical insights they need to control and optimize their processes.

The Sentry Advantage

Industry-leading experience - Taking the time to understand your business needs, we go above and beyond your immediate demands, exceeding expectations with the highest quality, customized sampling solutions in the market. Our engineers are well-respected throughout the industry for their technical competencies, applications expertise, and strong engineering backgrounds, which allow us to consistently offer the reliable technical solutions and support you demand.

World-class sampling application expertise - No matter the application, we are the go-to resource for high-performance sampling. Our advanced technical knowledge and experience is employed not only to simply meet standards, but sets the industry standards by which all others operate. We are uniquely qualified to meet each of your specific needs, from standard models born out of our proven expertise in designing sampling applications across a diverse range of industries to fully custom-engineered systems.

Improving safety and protection - We deliver sophisticated, representative sampling and analysis systems, perpetually driven to improve overall process efficiency by providing key insights into your operations. From sample conditioning – temperature, pressure, flow – to analyzers to identify and quantify chemical properties of the process stream, we enable our customers to develop higher performing, safer processes and products while protecting their assets, operators and the environment. 

Employee-owned and proud of it - As an employee-owned company, our team fully appreciates the value of every customer and the importance of every relationship. Learn more here.

Committed to long-term partnerships - At Sentry Equipment Corp, we continually invest in finding more and better ways to serve our customers. Over the years, we have expanded our Sentry brand by introducing new products, new services and acquiring companies with strong reputations, expertise, technologies or reach, and successfully uniting each company’s competencies with our own. Moving forward, with sampling remaining at the core of what we do, we will continue to extend our breadth of expertise to deliver more value throughout the process value chain.

Our Facility

Sentry Equipment Corp Facility

Our 66,500 square foot, state-of-the art building is located in the Commerce Centre of Pabst Farms, just south of Interstate 94 in Oconomowoc, Wisconsin. At our corporate and manufacturing facility, Sentry Equipment Corp employs ISO-certified processes and innovative technologies to manufacture sampling solutions, while saving energy and increasing sustainability through features such as environmentally conscious landscaping and state-of-the-art LED lighting fixtures.


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