​DOL 31 Fan speed controller

DOL 31 is a flexible and universal fan speed controller which can regulate heating and lighting apart from fans.

DOL 31 can with advantage be used for regulation of ventilation in livestock houses where an advanced climate controller is not required.

The operation of DOL 31 is simple, intuitive and user-friendly. Minimum use of display texts prevails. Instead, easily understood icons are used to make the controller easy to operate by anyone. This minimises the risk of faulty use which ensures the welfare of the animals.

The controller is sturdy and compact and a reliable operation is thus ensured.
Apart from an alarm relay, DOL 31 also has a control relay which could be used for turning the heating and cooling source on and off.