Tachometer 522 539-C FS-37VAC Tachometer measures rotational speed in the 0–100 RPM range. Identified by the 522 and 539-C designations, this unit is part of the Tachometer tachometer family and is configured for FS-37VAC operation. The 0–100 RPM range makes it suitable for monitoring slow shafts and providing precision-speed feedback within automation systems.
