These devices keep track of the number of times an event occurs or the amount of time that elapses. They are widely used in industrial and commercial applications, such as manufacturing, process control, and automation. Common categories include mechanical counters, electric counters, and electromechanical counters. They are designed to count a wide range of inputs, such as pulses, rotations, cycles, and frequencies, and can perform mathematical operations and trigger alarms or outputs based on preset conditions. Counters play an important role in monitoring and controlling processes, detecting faults and errors, and optimizing performance, making them a vital component of modern industrial systems. At SIGMA Surplus, we carry Red Lion, OMRON, and Eaton counters, along with many others from top manufacturers.