Electro-Sensors, Inc. manufactures and sells industrial production monitoring and process control systems. It manufactures a line of monitoring and control systems for a range of industrial machine applications. The systems measure machine production and operation rates, as well as regulate the speed of related machines in production processes. Its product range includes speed monitoring systems, temperature application products, position application products, vibration monitoring products, tilt switches and hazard monitoring systems. Its speed monitoring systems compare revolutions per minute or speed against acceptable rates as determined by its customers. Its speed monitoring systems also include a line of products that measure production counts or rates, such as number of parts, gallons per minute and others. Its main temperature applications include bearing, gear box, and motor temperature monitoring sensors. Electro-Sentry and HazardPRO are its hazard monitoring systems.