The Extech 461895-NIST Tachometer is a powerful tool that combines the functionality of both contact and non-contact tachometers. With its dual-mode capability, this tachometer is suitable for a wide range of applications, making it a valuable addition to your toolkit.The Extech 461895 offers both contact and non-contact measurement options, providing flexibility for various tachometer applications. The contact mode allows you to measure speeds ranging from 0.5 to 19,999 RPM by simply making direct contact with the rotating object. This makes it ideal for situations where physical contact is possible and preferred.In addition, the non-contact mode of the Extech 461895 utilizes visible light technology to measure speeds from 5 to 99,999 RPM. This feature allows you to measure speeds without the need for physical contact, making it suitable for situations where contact is not feasible or desired. With a range of up to 6 inches (150 mm) from the target, you can easily obtain accurate non-contact measurements.Designed with user convenience in mind, the Extech 461895 is easy to use and provides reliable and accurate results. Its intuitive interface ensures effortless operation, allowing you to switch between contact and non-contact modes seamlessly. The large LCD display provides clear and easy-to-read measurements, enhancing visibility and readability in various working conditions.Whether you need to measure speeds on rotating machinery, motors, or other equipment, the Extech 461895 Tachometer offers the versatility you need. Its combination of contact and non-contact modes makes it suitable for a wide range of applications, including automotive, industrial, and maintenance tasks. It includes NIST Certification.