Tachometers/Speedometers are precision instruments designed to measure and display rotational speed (RPM) or linear velocity in industrial applications. Key features include digital/analog displays, contact/non-contact sensing (e.g., optical or magnetic), and rugged designs for harsh environments. Common industrial uses include monitoring motors, conveyors, turbines, and vehicle fleets. Advanced models offer data logging, programmable alarms, and integration with control systems. Products range from handheld portable units to panel-mounted variants, meeting standards like IP67 for durability in manufacturing, automotive, and heavy machinery sectors.