About the Product
BK820A DC Fan Speed Tester with Touch Screen and Built-in Oscilloscope

The BK820A DC Fan Speed Tester is a high-precision diagnostic tool designed for testing and analyzing various types of DC fans. Featuring a 7-inch full-color touch screen (800×480 resolution), it offers a user-friendly interface for real-time monitoring and control.

With its integrated oscilloscope, this tester can display both current and FG signal waveforms simultaneously. It supports fan types with 2-wire, 3-wire, 4-wire PWM, and FG/RO signals, making it suitable for a wide range of brushless fans.

Advanced Programmable Power Supply
The BK820A includes a built-in DC power supply (0-52V, 5A), which automatically adjusts voltage to match the set value—even under load variation. It also supports reverse polarity protection and short-circuit safety, ensuring reliable operation.

Accurate and Versatile Fan Testing
You can measure fan speed (up to 65,000 RPM) using the built-in infrared sensor, eliminating the need for external markings. The system displays speed, voltage, current, and power in real time, with full control over PWM duty cycles and frequencies.

Durable Build & Easy Operation
Housed in an aluminum alloy shell, the BK820A is built to last. The unit’s compact design (355×200×155mm) and intuitive controls make it ideal for professional maintenance labs and engineering environments.