The TA500 Series Digital Tachometer is a professional handheld rotational speed measurement instrument designed for accurate RPM, surface speed, and length measurement. The series includes the TA500A non-contact laser tachometer, TA500B contact tachometer, and TA500C combination laser and contact tachometer, providing flexible solutions for different industrial measurement requirements. Featuring high-precision sensing technology and a five-digit large LCD display, the TA500 Series tachometer, RPM meter, rotation speed tester, and speed measurement instrument deliver fast and reliable readings for various rotating equipment applications. The non-contact laser measurement mode of TA500A and TA500C allows safe RPM testing from a 50–500mm distance without touching rotating parts, while the contact measurement mode of TA500B and TA500C is suitable for direct measurement of shaft speed, surface velocity, and running length. With practical functions including data hold, maximum/minimum value recording, backlight display, and automatic power-off, the TA500 Series digital RPM meter is widely used in motor manufacturing, fan production, pump testing, automation systems, power generation, petrochemical plants, steel and metallurgy industries, aerospace equipment, HVAC systems, mechanical maintenance, and warehouse automation applications. It is ideal for testing motors, engines, fans, blowers, conveyor belts, rollers, rotating shafts, and other industrial machinery for quality inspection, commissioning, troubleshooting, and preventive maintenance.