LED Stroboscope Testo 477

The Testo 477 LED Stroboscope is a powerful diagnostic tool that allows you to observe fast-moving components as if they were standing still. With an impressive measurement range of 30 to 300,000 flashes per minute (fpm), it enables visual inspection and speed measurement of rotating or vibrating parts — all without stopping machines or disrupting operations.

Using short bursts of intense light, the stroboscope creates a “frozen” image effect, making it possible to detect irregularities in motion, verify synchronization, and observe intricate processes in industrial equipment. This is particularly useful in applications such as textile machinery, printing systems, and manufacturing lines, where high-speed movements are difficult to monitor by eye.

Thanks to its bright LED light output (up to 4800 Lux at 6000 fpm) and adjustable flash duration, the testo 477 delivers sharp visual feedback even in demanding environments. It eliminates the need for reflective markers and enables accurate rpm measurements of small or hard-to-access components.

Built for industrial reliability, the robust housing with IP65 protection resists dust, water, and impacts, making it suitable for rugged conditions. The device also includes trigger input and output for external synchronization, ensuring seamless integration into control systems or use with external sensors.

The testo 477 features a long battery life — up to 11 hours with the rechargeable NiMH battery or 5 hours with AA batteries — supporting extended, uninterrupted measurements. A multiline LCD display ensures clear readability, while user-friendly controls allow fast adjustments during operation.

Complete with a carry case, calibration protocol, and signal trigger plug, the Testo 477 is ideal for professionals who need precise, contact-free motion analysis and rpm measurement in real time.