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Semper Industries is a Mentor, Ohio finishing company known for specialty powder and wet coating, with a veteran team that takes projects from preparation through packaging. Serving customers for decades, it is a U.S. Department of Defense vendor qualified for MIL-spec and CARC coatings, with more than a quarter of its coating work focused on military applications. As part of the Adams Technologies family of machining, stamping and finishing businesses, Semper offers a vertically integrated route from component production to finished parts.
SencorpWhite is an Ohio-based industrial equipment company known for supporting a group of specialized manufacturing brands. Through CeraTek, it serves medical-device manufacturers with heat-sealing equipment for sterile packaging, while its broader service operation provides field support and equipment upgrades for customers’ production needs.
Family-owned for three generations, Seneca Label has manufactured custom-printed, pressure-sensitive labels in the Cleveland area since 1968. Its in-house prepress, platemaking and slitting operations support labels designed for demanding uses, including laboratory and chemical applications. Seneca is part of ID Images and maintains ISO 9001 certification.
Founded in 2019, Seneca Manufacturing is a Tiffin, Ohio startup built around the more than 80-year engineering and manufacturing legacy of its partner facility, OCECO. The company serves oil and gas customers, engineering firms, government and OEM sectors with machining and fabrication work. Its ISO-certified quality management system and 32,000-square-foot facility support both current production and future expansion.
Family-owned since its 1964 opening, Seneca Sheet Metal Company has built its identity around dependable custom fabrication in Northwest Ohio. Known especially for industrial ventilation, the company serves customers ranging from independent proprietors to major engineering firms, taking projects from prototypes through long-running production work.
Senney Enterprises is a group built by acquiring complementary companies, bringing process-equipment and replacement-parts suppliers together under one organization. It helps customers find a suitable specialist within that group when their initial contact is not the right fit.
Sense Diagnostics, Inc. develops non-invasive RF brain scanners designed to detect stroke and traumatic brain injury rapidly and monitor brain conditions in real time. Based in West Chester, Ohio, the company’s medical co-founders include specialists in emergency medicine and neurology, while its active RF headsets are developed and manufactured under an ISO 13485:2016-certified quality management system. Its investigational devices remain under development and are not yet cleared for clinical use in the United States.
SenseICs is a Columbus small business co-founded by Ohio State-trained engineers Ramy Tantawy and Shane Smith, whose combined backgrounds span industry and university research. The fabless semiconductor company develops custom integrated circuits and microelectronics for mission-critical government and commercial systems, with particular depth in advanced imaging and trusted hardware. Its partnership with The Ohio State University keeps the company closely connected to local electronics research.
Founded by Jack Haas Sr. in 1978, Sensical has grown from a two-person Cleveland shop into a 150-plus-employee manufacturer built around practical problem-solving and long-term customer partnerships. Today, its Solon operation supports OEM customers with custom manufacturing solutions, including material conversion and assembly, from a 200,000-square-foot facility. The company is ISO 9001 certified and produces more than 90 million components annually.
Formerly known as Therm-O-Disc, Sensience has more than 80 years of experience developing sensing technologies for manufacturers of appliances, climate-control equipment and other demanding systems. Now an independent business since 2022, it produces nearly one billion engineered components annually, with a particular reputation for glass-to-metal hermetic sealing and a global network of manufacturing and engineering sites.
Sensience is a global manufacturer of highly engineered sensing, control, and sealing components; the company says it has developed sensing technologies for more than 80 years. Formerly Therm-O-Disc, it became a standalone business in 2022 after its purchase by One Rock Capital Partners. Its components are used in platforms ranging from appliances and refrigeration equipment to motor vehicles and aircraft.
Cincinnati-based Sensory Robotics builds 3D sensing and software systems that let people, industrial robots, and mobile platforms share production space safely. Its flagship SR-1 is a fenceless safety system with UL 1740 certification and PLd Category 3 validation through ISO 13849 methodology, designed for changing layouts and frequent access rather than static guarded cells. The company’s co-founders bring backgrounds in industrial automation, robotics, and manufacturing software, while its development work extends to mobile robot safety and production-press monitoring.
Since 2002, Youngstown-based SenSource has built people-counting sensors and the Vea analytics platform that turn foot-traffic data into practical business decisions. Its 3D stereo-vision and AI systems are backed by in-house installation, support, and ongoing monitoring, with applications ranging from retail traffic to occupancy and church attendance. SenSource says its systems are installed in more than 1,000 locations and guarantee 98% accuracy.
Founded in 1977, Sentinel Systems builds access-control hardware and management software specifically for self-storage operators. Its operator-focused platform brings together facility management, connected security equipment and self-storage websites, with a team that includes former storage operators, engineers and support technicians. Sentinel has served the industry for more than four decades and continues to support both independent owners and multi-facility portfolios.
Sentric Safety Group, formed in 2016, carries a safety tradition that reaches back to the 19th century, when Paul Bouré designed an engagement lock for railway safety. Today, its global team unites long-established safety companies and serves organizations working in hazardous environments, with the Kirk operation in North Canton tracing its own history to 1932.
Founded in 2002, SentriLock makes electronic lockboxes and integrated access-management tools for real estate professionals, combining property access with showing and client-management software. Based in West Chester, Ohio, the company is 100% owned by the National Association of REALTORS® and its system is used by more than 500,000 agents, with over 1.39 million lockboxes in use. SentriLock also holds ISO 9001 certification and supports its products with a U.S.-based customer service team.
Founded in 1998, family-owned Sentro Tech manufactures high-temperature furnaces and processing equipment from its Northeast Ohio facility. The company began by making molybdenum disilicide heating elements and expanded into custom laboratory and production furnace design in 2004, now supporting applications from dental labs to battery and ceramic manufacturing. Its Ohio team also provides technical service and keeps replacement parts in stock for customers.
Sentry Protection Products began when an Ohio building contractor and a plastics molder created Column Sentry to stop forklift damage from turning into costly column repairs. Since 1988, the Lakewood, Ohio company has expanded that original idea into impact-resistant protection and collision-warning equipment for commercial and industrial facilities, manufacturing its products in North America and Europe and selling them worldwide.
Founded in 1980, Sepha develops specialised equipment for pharmaceutical and medical-device packaging, with a particular focus on non-destructive leak and container-closure integrity testing. Its lab-scale blister packaging machines and deblistering systems serve research, production and quality-assurance teams, while a global support network and North American base extend its reach. Sepha has been part of the TASI Group since 2013.
From its Kettering shop, Sepma Technologies makes composite components through filament winding and precision CNC turning, with particular expertise in laminate design. The company also helps composite manufacturers improve production through automation and process-technology solutions, while supporting new composite applications with CAD/CAM, simulation, and full-scale prototyping.