The Flume 2 and Flume 2X both pair a sensor on the water meter with a Flume Bridge on Wi-Fi.
The 2X adds a parylene-coated sensor, upgraded Wi-Fi connectivity and a second pre-installed battery pack. Flume lists Alexa and Google Assistant, and says it does not integrate with HomeKit or SmartThings. Home Assistant has a Flume integration that polls the cloud.
Flume gives the Flume 1 the model number F1100 and lists no model number for the Flume 2 or Flume 2X. The Flume 2 sensor ships with one battery pack and the Flume 2X sensor with two.
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Flume water monitors. Smart Home Canon. https://smarthomecanon.com/lines/flume-water-monitors. Last checked 2026-10-20.