Output tracking regulator is made from DTZ series regulator which adds a output tracking unit. When the regulator is in automatic status, its working can be controlled by the external contacts. Before connecting, regulator output is changing according normal adjustment process rules; after connecting; Regulator output is changing according external output tracking signal. Therefore, it can balance the non-disturbance-free switching when completed with manual device or with another regulator. As the actuator is equipped with manual operated device, so the regulators often used in a automatic adjustment circuit with the actuator or the main regulator in a series circuit.