Dwyer Instruments is the premiere manufacturer and innovator of sensors that make up the heating, cooling, and ventilation systems found in our daily lives. We manufacture quality products. It's what we do. Since our founding in 1931, Dwyer manufacturing has expanded across several Midwest states, including Indiana, Michigan, and Missouri. For us, it’s not enough just to support U.S. based jobs. We focus on designing and assembling our products in the United States.Shop All Dwyer Instruments ProductsVisit Dwyer Instruments Website