If you're looking for the most effective

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the screw-on lid eliminates broken latches so you can focus on your work

The reusable Hygro-i2 probes can also be used with the Tramex Feedback Datalogger to give live readings and time logs of relative humidity

Air-Care Pogo Pole Hose Adaptor 300mm 3M If you're looking for theThe Pogo Pole Hose Adapter 300mm is the quickest way to attach an Air Care Turbojet or other brand negative air machine to a ceiling or wall duct. The 50 x 50cm moulded poly adapter plate has a 51mm foam seal that will protect delicate walls and ceilings during cleaning. The pole is spring loaded and has an adjustable height to provide gentle, yet firm, pressure on most ceilings or wall connections and will often work well on acoustic drop ceiling