The PD-Pro has 2 sensor inputs, but can more sensors be hooked up to it?
The maximum number of sensors engineered to be configured with ETI’s Residential Type “Pro” Series - to include the PD-PRO, is two of any combination i.e. Pavement, Aerial and/or Gutter.
Recognizing the above, ETI’s Light Commercial Type”APS-3C / APS-4C/SC-40C” Series can accommodate six of any combination, again Pavement, Aerial and/or Gutter, illustrated as follows:
Again, unfortunately the answer is no, this cannot be accomplished given the designed engineered parameters as set forth when this series was initially developed... We’ve have had instances where others have attempted this, however, each & every time it proves to lend itself to operational instability & inevidably product failure.