McDonnell & Miller is a long-standing manufacturer of boiler control and safety products, including flow switches, low water cut-offs, level controls, and associated control instruments for steam and hot water boiler applications. Their solutions help protect against unsafe operating conditions and support consistent system performance.
Oslin Nation Co. is the trusted Texas distributor for McDonnell & Miller flow, level, and boiler control products, supplying instrumentation that supports boiler safety, reliable operation, and system protection.
Browse McDonnell & Miller Control Products
Find McDonnell & Miller instrumentation with Oslin Nation Co. for controlling flow and water level and protecting boiler systems in commercial and industrial applications.
Flow Switches
Detect flow presence or loss to trigger control actions in hydronic and boiler piping systems.
Low Water Cut-Offs
Interrupt boiler operation when water levels drop below safe operating limits.
Level Controls
Sense and manage water level conditions in steam and hot water boiler systems.
Boiler Controls
Control and safety devices used to manage boiler operation and protect against unsafe conditions.
Find the Right McDonnell & Miller Solution Fast
Use Oslin Nation Co.’s Find a Product Tool to match your application’s flow, level, or boiler safety requirements with the right McDonnell & Miller control product.
We’re Here To Help
Accurate flow and level control are essential for safe boiler operation. Our team can help you identify the McDonnell & Miller instruments that improve safety, reduce risk, and support dependable performance in your steam or hot water system.
Featured McDonnell & Miller Products
North America’s Largest HVAC Manufacturer Rep Firm HTS Acquires Oslin Nation
HOUSTON (June 14, 2023)…HTS Eng. Ltd today announced it has entered into an agreement with the owners of Arlington, Texas-based...
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