MBS 1700-1811-A1AB04-0 is part of the Danfoss motorized balancing set, which is used to balance HVAC systems in order to improve efficiency and reduce noise. It consists of a flow-measuring device, pressure sensor, mounting equipment, and a self-balancing control unit. The MBS 1700-1811-A1AB04-0 specifically is a flow-measuring device featuring built-in pressure, temperature, and differential pressure sensors. Additionally, it features local, analog, and digital outputs for better control of the HVAC system.