The all new Tuff range from Casella CEL is exactly that. A range of 48 pumps with a variety of features to match almost all requirements for a personal air sampling pump. Simple and intuitive 4 button controls allow the user to quickly get to grips with the operation of this pump family and get the best out of it while performing the necessary tasks. Two easily replaceable and rechargeable battery packs are quickly charged in about 3 hours on the single or 3 way drop in charger base. Three models provide Standard, Plus and Pro versions of usability with either 3 or 4.5 l/m maximum flow rates.