Press the red "Measure" button to turn the unit on. Ensure the LCD screen shows "LASER" on the left side.
Hold the device 50mm to 500mm (2 to 20 inches) away from the rotating object. The laser spot should hit the reflective tape squarely.
| 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
This compact, laser-guided tachometer allows you to measure Rotations Per Minute (RPM) from a safe distance. Whether you are an HVAC technician diagnosing a faulty blower or a hobbyist balancing a CNC spindle, here is everything you need to know about the Uni 3220. The Uni 3220 is a non-contact digital tachometer. Unlike old-school mechanical tachometers that required physical contact with a spinning shaft, this device uses a visible laser beam to measure reflective pulses.
Mastering the Uni 3220: The Ultimate Guide to Your Contactless Tachometer Press the red "Measure" button to turn the unit on
How to measure RPM safely, accurately, and without stopping your machines.
If you maintain industrial motors, RC cars, or even bicycle wheels, this $40-$60 tool will pay for itself the first time you diagnose a failing bearing (overheating due to high RPM) or calibrate a variable frequency drive. The laser spot should hit the reflective tape squarely
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.