The Extech RPM33 is a versatile digital tachometer designed for accurate measurement of rotational speed and linear surface speed. This handheld instrument combines precision, functionality, and essential features to provide reliable RPM (revolutions per minute) and linear speed measurements for professionals in industries such as automotive, manufacturing, and maintenance.The Extech RPM33 utilizes non-contact optical sensors or mechanical adapters to measure the rotational speed of rotating objects such as motors, fans, and gears. It can also measure linear surface speed by using a contact wheel or a reflective strip. This tachometer typically features a clear LCD display that shows real-time RPM or linear speed readings, allowing for easy monitoring and analysis of rotational or linear motion.The tachometer offers various measurement modes, including instantaneous and maximum/minimum values, allowing users to capture and record critical data. It may also include additional features such as data hold function for freezing the measurement reading, memory function for storing values, and adjustable measurement units to accommodate different applications.The Extech RPM33 is designed for ease of use, with a straightforward interface and intuitive controls. It is typically battery-powered and offers a compact and portable design, allowing for convenient use in different locations and situations.The Extech RPM33 is suitable for a wide range of applications, including equipment maintenance, quality control, and performance testing. Accurate and reliable measurements of rotational speed and linear surface speed are essential for ensuring optimal operation, troubleshooting issues, and assessing performance in various machinery and mechanical systems.