Initially I had a little trouble getting accurate readings when checking speed measure my lathe. It turns out that the background of what you're trying to measure needs to be completely non-reflective to work. The spindle on my lathe, though old, dirty, and dull, looked like it would work, but I couldn't read it very well. reflective band across the band. It worked great.
Breathalyzer Lydsto Lydsto HD-JJCSY01
8 Review
π Enhanced Precision and Functionality: Protmex Reflective Tachometer
3 Review
π§ Streamline Your Work with Loos Co PT 1 Professional Hands-Free Device
3 Review
FITNATE Non Contact Tachometer - Enhanced Accuracy with Battery Operation
3 Review
π Enhanced Precision with Backlit Professional Manometer for Differential Ventilation
6 Review
π¬οΈ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
8 Review
Digital multimeter RGK DM-12
6 Review
Portable Handheld Manometer π for Accurate Pressure Differential Measurement
5 Review