The MBS-PRO 4-in-1 sensor combines a precision air temperature, humidity, CO2 (PPM) sensor and photocell to create the perfect all-in-one environmental sensor. It is designed for Hydro-X Pro system only.  Assembled using a new water-resistant plastic injected enclosure, 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. The MBS-PRO features a built-in LCD display to show the current conditions of that sensor which provide the ease of onsite monitoring. It also features a new “push-lock” connection to make installation easy.Please Note: The MBS-Pro requires the SPH-1 for supplemental power. "Sensors should remain dry and clean to prevent premature failure. Do not spray foreign substances or allow water / condensate on the sensors"