Is there a specific range for Flowie to work?

Flowie doesn't have ranges, per se, since it attaches directly to your water meter.
However, it does need to have: 

• A nearby power outlet to plug the sensor in.
• Good cellular reception 
  Since this sensor communicates over a cellular network, it will need to be able to establish a signal with an existing cell phone network. If the area you have your water meter gets decent cell phone reception, this sensor should work just fine. If it's in an area with low reception, you can strengthen the reception by using the extension antenna.

To connect a Floodie companion sensor to your Flowie water sensor, Floodie needs to be installed within:

• 400 feet of your Flowie (horizontal range)
• 6 floors of your Flowie (vertical range)