The Extech 461950-NIST 1/8 DIN Panel Tachometer is a versatile and accurate device designed for measuring rotational motor speed in various applications. Whether you need to measure the speed of moving fans, pumps, gears, or propeller devices, this tachometer has got you covered.The Extech 461950 comes with a choice of two sensor pickup types, allowing you to select the option that best suits your specific needs. The first option is the proximity sensor, which offers a target distance of 0.1 inches (3 mm) and a range of up to 36,000 RPM (600 Hz). This sensor is ideal for applications requiring high-speed measurements.The second option is the photoelectric sensor, which provides a target distance of 0.4 inches (10 mm) and a range of up to 6,000 RPM (1 kHz). This sensor is suitable for applications where a slightly larger target distance is required or for lower-speed measurements.The Extech 461950 is designed for easy installation and integration into your existing panel setup. With its 1/8 DIN size, it can be mounted on a panel for convenient access and visibility. The clear and intuitive display allows you to read the rotational motor speed with ease.Whether you're in an industrial setting, conducting maintenance work, or performing quality control, the Extech 461950 is a reliable tool that provides accurate and consistent measurements. It is built to withstand the demands of professional use, ensuring long-lasting performance and reliability. It includes NIST Certification.