How do the Sensor and Valve Controller communicate? January 21, 2025 06:10 Updated The Sensor and Valve Controller communicate using 433 MHz RF radio. Related articles How to check Valve operation after LevelSmart installation How do I pair the LevelSmart Wireless Autofill Can I use there LevelSmart with an negative edge pool? Do I need an extra Antenna extension? What do the LevelSmart LEDs indicate?