They are particulate filter classes from two different schemes

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The speed and accuracy of the Tramex Hygro-i2® probes set them apart from all other RH probes on the market

The adapter attaches to almost all standard air movers

76 Amps Voltage 240V Frequency 50Hz Hour Meter Yes Daisy Chain Outlet Yes GFCI Protection Yes Stackable Yes Cord Length 6 Metres Weight 13

Delmhorst BDX-30 Contractor/EIFS Moisture Meter Package Zipwall They are particulate filter classesThe Delmhorst BDX 30 Contractor EIFS Moisture Meter Package includes: Carrying Case 21 E Electrode 26 ES Hammer Electrode & Hole Punch The powerful Delmhorst BDX 30 Moisture Meter brings all the design elements and functionality of the BDX 20, and also introduces Bluetooth integration to the Navigator family with the Delmhorst EDGE app! This exciting addition to the meter enhances your ability to ensure precise readings from anywhere and export data