ELECTRO SENSORS INC

Electro-Sensors, Inc. (ESI) manufactures and sells industrial production monitoring and process control systems. ESI was incorporated in Minnesota in July 1968. The company's systems measure machine production and operation rates and regulate the speed of related machines in production processes. ESI has a sales agreement with Motrona GmbH, a German control and interface devices manufacturer, allowing ESI to distribute Motrona products in the United States. These Motrona products interface with ESI's products for various motion monitoring applications. ESI's speed monitoring systems compare revolutions per minute or speed against customer-determined acceptable rates. These systems range from simple slowdown or stoppage detection to sophisticated systems that warn of deviations from precise tolerances and allow subsidiary operations to be determined through shaft speed monitoring. The speed monitoring systems also include products that measure production counts or rates, such as number of parts, gallons per minute, or board feet. These systems incorporate alarm systems, tachometers, and other devices that translate sensor impulses into alarm signals for customers. ESI also offers products for drive control systems that regulate motor speed on related machines in a production sequence to coordinate various operations. These products include a line of digital control products for motors requiring complete closed-loop PID (Proportional Integral Derivative) control.