Easy to use reflective tape helps keep track of RPM. Because I measured the speed. Shaft oiled, I cleaned the surface and used a chalk marker. Reading was satisfactory
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
π Enhanced Precision with Backlit Professional Manometer for Differential Ventilation
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Portable Handheld Manometer π for Accurate Pressure Differential Measurement
5 Review