TrolMaster Hydro X 4 in 1 Sensor for Hydro X Pro only (MBS Pro) Scotts Each brick makes 20 Liters Product:Nutri+ Root Plus Gel 8OZ Each brick makes 20 Liters of CANNA COCO when expanded The Dual 225 is one of the most energy efficient dehumidifiers on the planet performing using minimal amps (6 the MBS PRO can be placed in multiple locations throughout the growing area to provide spot measurements from multiple sensors (Up to 50 sensors can be connected to the Hydro X Pro) The sensors can then be used together (averaged) or separately in order to control a specific section of the grow area by assigning a sensor to a specific control device It also features a new “push lock” connection to make installation easy