L54120+ Water Meter

July 19, 2022
H2O Degree's L54120+ Water Meter is a battery powered device that communicates wirelessly over a LoRaWAN secure wireless 915 MHz network.

The L54120+ Water Meter is a battery-operated, LoRaWAN-based, wireless water meter. It measures water flow in gallons and record the number and duration of water usage events; the meter records total water consumption, water usage events, and water temperature The device is equipped with LoRaWAN secure wireless 915 MHz technology that offers line-of-sight, bi-directional communications of over six miles, reducing the need for repeaters. Additionally, the device requires no electrical connections.


With their long-range wireless connectivity, the units can operate within a 1,000-ft (305-m) radius from the gateway. Utilizing H2O Degree’s Smart Metering wireless data acquisition system and PC-based software, the L54120+ water meter collects and reports water consumption data at granular levels.

  • The H2O Degree L54120+ water meter is a battery powered device that communicates wirelessly over a LoRaWAN secure wireless 915 MHz network
  • LoRaWAN radio infrastructure provides the longest range in the industry for communication distances, eliminating the need for repeaters, all over a secure open protocol network
  • The device collects and records six registers:
    • Gallons
    • Time water was flowing in minutes
    • Number of events (event is defined as each time water starts then stops flowing)
    • Water temperature (once/day)
    • Battery voltage
    • * All of the registers except temperature are cumulative or ever increasing registers. Even if the radio cannot transmit data, the water meter continues to record data
  • By using a magnet, the installer can force a radio transmission and receive a LED sequence feedback on radio connectivity in real-time for ease/validation of commissioning
  • Type of packet data reported: Data Packet Consumption (60 minute interval default)
  • Non-volatile memory maintains last reading in the event of a power failure
  • The L54120+ battery has a five year warranty and can be replaced by the property’s maintenance staff
  • Accuracy +/- 1.5% (Meets AWWA C708 Standards)
  • Operating temperature 0 to 150°F (-18 to 66°C)
  • Flow 0.26 to 7.9 gpm
  • L54120+ approvals:
    • NSF-61-G Certified
    • Meets AWWA C708 Standards
    • MA Board of Plumbers Approved Cert. # P1-0918-94
    • NSF 372-2011
    • Certification standard ASME A112.4.7-2002