The Extech 461920-NIST Laser Tachometer is a reliable and user-friendly tool designed for safe and non-contact RPM measurements. This tachometer utilizes an integral laser and reflective tape to accurately measure the RPM of rotating objects without the need for physical contact.The Extech 461920 is ideal for various applications where non-contact RPM measurements are required. Whether you're working with rotating machinery, motors, fans, or other equipment, this tachometer provides a safe and convenient solution for obtaining RPM readings.To use the Extech 461920, simply point the integral laser at the reflective tape placed on the rotating object to be measured. The tachometer detects the reflected light from the tape and calculates the RPM accurately. With a target distance of up to 1.6 feet (0.5 meters), you can easily measure RPM from a safe distance.Designed with user convenience in mind, the Extech 461920 features a large and easy-to-read LCD display, providing clear and accurate RPM readings. The compact and handheld design makes it comfortable to use, allowing for precise measurements even in tight or hard-to-reach spaces.With a wide measurement range from 2 to 99,999 RPM, this tachometer offers versatility and can handle a variety of applications. Whether you need to measure low RPMs for precise machinery or high RPMs for fast-moving equipment, the Extech 461920 is up to the task. It includes NIST Certification.