Rebuild-it, a Sentry Equipment Company
About
Sentry Equipment is a 100% employee-owned manufacturer headquartered in Oconomowoc, Wisconsin — recognized as a USA TODAY Top Places to Work for 2026 — that operates through three brands: Sentry Equipment for process sampling systems, RockWater for wastewater clarifier equipment, and SmartSkim for coolant recycling and oil separation. The sampling division builds representative sampling systems ranging from individual probes and conditioners to complete Steam and Water Analysis Systems (SWAS) for power generation, oil and gas, nuclear, and liquid and slurry applications. The ProShield LP is the flagship sample conditioning system for maintaining sample integrity and protecting downstream analyzers. The RockWater brand manufactures welded clarifier bodies with custom-programmed drives for wastewater sedimentation, while the Rebuild-it service line provides repair, retrofit, and refurbishment of existing clarifier equipment as a cost-effective alternative to new purchases. The SmartSkim product line addresses coolant maintenance through the CoolantLoop system for removing tramp oils, solids, and bacteria from machine sumps, magnetic separators for ferrous particle removal, portable filtration systems for shop-floor deployment, and suction skimmers for surface oil recovery. Sentry Equipment serves power generation, oil and gas, water and wastewater, bulk solids handling, and nuclear industries, combining over a century of maintenance expertise with custom-engineered solutions for unique operational requirements.
Key Products
Representative sampling equipment including sample probes, conditioners, and complete SWAS installations for accurate process monitoring across power generation, oil and gas, and industrial applications.
Sample conditioning system for maintaining sample integrity and protecting downstream analyzers in process monitoring applications.
Custom-programmed clarifier drives designed for easier maintenance, durability, and reliable long-term operation in wastewater sedimentation applications.
Bolted and customized clarifier bodies for efficient solids separation and superior water quality in wastewater treatment plants.
Complete range of retrofitting and repair services for existing clarifiers, providing a cost-effective alternative to new equipment purchases.
Coolant recycling system that removes tramp oils, solids, and bacteria from dirty sumps to extend coolant life and improve machining operations.
Equipment that removes free-floating and mechanically dispersed tramp oils from industrial fluids for coolant maintenance and oil recovery.
High-powered magnetic rod filters for fine ferrous particle removal from process and coolant fluids.
Shop-floor-friendly mobile filtration units for flexible deployment in industrial coolant and fluid maintenance.
Surface skimming devices that remove free-floating and mechanically dispersed tramp oils from fluid surfaces in sumps and tanks.
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