Electro-Sensors makes industrial monitoring and control systems for factories and processing facilities. The core products are sensors and integrated systems that monitor shaft speed, temperature, vibration, belt alignment, and position across industrial machinery, alerting operators when equipment runs abnormally so they can intervene before accidents or costly downtime occur. The two flagship product lines are Electro-Sentry, a wired hazard monitoring system that combines multiple sensors with programmable control logic, and HazardPRO, a wireless version with a dashboard interface that is certified for hazardous dust environments — a key differentiator for customers in grain, milling, and bulk materials handling where dust explosion risk is a real concern. Electro-Sensors also sells drive control systems that coordinate motor speeds across linked machines in a production sequence. Customers span grain, milling, bulk materials handling, food processing, ethanol, power generation, and general manufacturing. Electro-Sensors sells hardware — sensors, monitors, controllers, and integrated systems — as standalone units or complete ready-to-install systems, through a mix of an internal sales team and a network of manufacturer's representatives and distributors. The company targets both new installations and the retrofit market, where older industrial facilities upgrade existing equipment. International sales account for roughly 12% of revenue across 21 countries. Electro-Sensors is a small, 38-employee company that is actively exploring acquisitions of complementary businesses and has a U.S. distribution agreement with Motrona, a German motion control device manufacturer.