Uni 3220 【NEWEST】

Hold the device 50mm to 500mm (2 to 20 inches) away from the rotating object. The laser spot should hit the reflective tape squarely.

Numbers keep jumping (e.g., 1500, then 3000). Fix: The sensor is seeing double reflections. Move the unit closer or cover any shiny surfaces behind the shaft with black electrical tape. Final Verdict The Uni 3220 is a workhorse. It isn't fancy, it doesn't have Bluetooth, and it won't log data to an app. But it will tell you exactly how fast something is spinning within +/- 0.05% accuracy every single time.

| Feature | Uni 3220 | Generic $20 Units | Fluke 931 | | :--- | :--- | :--- | :--- | | | 99,999 RPM | 30,000 RPM | 99,999 RPM | | Build Quality | Rubber armored | Hard plastic | Rubber armored | | Memory Recall | Yes (Last/Max/Min) | Usually only Max | Yes (Detailed stats) | | Price Point | $$ (Mid-range) | $ (Budget) | $$$$ (Premium) | uni 3220

How to measure RPM safely, accurately, and without stopping your machines.

Mastering the Uni 3220: The Ultimate Guide to Your Contactless Tachometer Hold the device 50mm to 500mm (2 to

If you work with motors, fans, conveyor belts, or any rotating machinery, you know the golden rule: That’s where the Uni 3220 becomes an indispensable tool in your toolkit.

The verdict: The Uni 3220 offers 90% of the Fluke's accuracy for 30% of the price. It is the "sweet spot" for serious DIYers and professional maintenance crews. Problem: Screen shows "0" or "---". Fix: You missed the tape. Angle the laser slightly so it hits the path where the tape will be, not where it currently is. Fix: The sensor is seeing double reflections

Press the red "Measure" button to turn the unit on. Ensure the LCD screen shows "LASER" on the left side.