The MT820DFP is designed to monitor cable flows and inlet pressure. It has 10 individual flow transducers, so it can supply air to 10 cables. It comes in two sizes, one for 19” racks and the other for 23” racks.
The MT821SPP is designed to supply and monitor one single cable flow, they are mainly used to supply air to the cable parallel air pipe that feeds the entire cable at different points in order to obtain an even air pressure all along the pressurized cable.
The MT822DPP is designed to supply and monitor two cable flows, they are mainly used to supply air to the cables parallel air pipes that feeds the entire cables at different points in order to obtain an even air pressure all along the pressurized cables.