What do you mean by pneumatic counter?

A pneumatic counter is a device that uses compressed air to count objects or events, often in industrial settings. It operates by detecting the presence or absence of an object as it interrupts an airflow or activates a pressure switch. This type of counter is commonly used in manufacturing and packaging processes to keep track of items being produced or processed. Pneumatic counters are valued for their reliability and ability to function in harsh environments where electronic counters may fail.