A must for technicians. Some people may need a counter that reads up to 1000. I don't have video of these, but I tested the SDMN6 against my homemade one and they were accurate to within a few 1000s at 1inWC. The pressure switch pump is impressive and can end up wrecking your switch if you don't use a bleed adapter for non-bleed switches (READ THE INSTRUCTIONS!, metal switches don't usually have a built in bleed). As far as build quality goes, the thing is solid in every way. Don't be intimidated by the fact that you have to reset it. Barometric pressure changes discard the atmospheric reference. When entering a new pressure zone, simply reset to zero and continue working. The field element support is also the best. No regret. The pressure switch tester adds over 100 to the price of SDMN5, so if you don't need it you get 5.
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
π‘οΈ Continuous Temperature Monitoring with Relative Humidity Integration
4 Review
Portable Handheld Manometer π for Accurate Pressure Differential Measurement
5 Review