The fog generator HM 170.52 produces high-density fog by evaporating a liquid glycol mixture, in order to visualise flow. The fog is injected into the wind tunnel as a jet by using a lance. For this reason, the lance is inserted into holes in the channel prepared for this purpose. Two interchangeable nozzles are available to adapt the discharge velocity of the jet to the flow velocity of the air in the wind tunnel.
The fog generator can also be used to visualise flows at fans, inlets and outlets.