Never Used Brand new The Fluke 805ES External Vibration Sensor is a high-quality device designed for measuring vibrations in various industrial and commercial settings. Manufactured by the reputable brand Fluke in the United States, this sensor is reliable and accurate in detecting vibrations with a frequency range of 10 to 1000 Hz. With a unit quantity of 1, this sensor is perfect for monitoring and controlling vibration levels in machinery, equipment, and structures to ensure optimal performance and prevent damage. Its durable construction and precision engineering make it a valuable tool for vibration analysis and troubleshooting. just sat in the box.