With this interface, some anemometers not manufactured by Davis Instruments can be used with the Vantage Pro2. Non-Davis anemometers must have AC voltage output signals. The frequency of the AC signal must be linearly proportional to the wind speed.
This interface has been tested with R. M. Young anemometers, model number 05103; and with NRG anemometer, model 1900 NRG #40C. However, the interface is not limited to those products.