As with anything, if you buy the cheapest thing it obviously sucks, but with an abrasive and a lube you can make it work for you, right? don't trust them with anything important, even after they're set up. But let me guess, you're furious at the thought of not getting a $2 Starrett.
Portable Handheld Manometer π for Accurate Pressure Differential Measurement
5 Review
Digital multimeter RGK DM-12
6 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