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.
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. uni 3220
Mastering the Uni 3220: The Ultimate Guide to Your Contactless Tachometer This compact, laser-guided tachometer allows you to measure
Disclaimer: Always wear appropriate PPE when working around rotating machinery. Remove loose clothing and jewelry. Remove loose clothing and jewelry
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.
How to measure RPM safely, accurately, and without stopping your machines.
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.