The Master-5 is the central regulator that an be linked with 0-10V modules (e.g. triac or frequency controller). allows consistent climate regulation by fan control based temperature. It provides the likelihood to regulate a heater and an alarm along with modifiable minimal and optimal ventilation levels. The Master-5 comprises of an auto-cooling down correction, an air inlet indicator and 2 programmable 0-10V output indicator that can be smoothly extended. You can also link the multiple Master-5 controllers to drive and regulate extra fans, transformers, winch motor and valves.