Equipment installed in rack cabinets, such as servers, systems of emergency power supply, surveillance, CCTV, alarm, etc. , all require maintaining the temperature at an appropriate, steady level. Lanberg offers a simple and flexible solution that will easily accomplish this very goal: closed-loop thermostat AK-1505-B. It enables temperature regulation inside server rack cabinets by controlling the power supply to cool equipment and/or products, providing more efficient air flow. The device is equipped with a current contact which is shorted (closed) and thus switches on the connected cooling only when the temperature, set previously by the user, is exceeded. All this is possible due to the thermo-bimetallic sensor which mechanically deforms under the influence of ambient temperature. In combination with the temperature sunken knob, it allows the operation of the thermostat to be adjusted accordingly to the user's preferences.