You can't beat this price, in fact it works very well, it doesn't seem like a quality indicator at first but it works very well and I've compared it to the daily consumption gauge and get the same numbers. I used it on Trens Sn 50 4jaws.
🔍 Enhanced Precision with Backlit Professional Manometer for Differential Ventilation
6 Review
Portable Handheld Manometer 📏 for Accurate Pressure Differential Measurement
5 Review
Digital multimeter RGK DM-12
6 Review
🌬️ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
8 Review