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340LW Series LonWorks® BTU Transmitter
Impeller/Data Industrial

340LW Series LonWorks® BTU Transmitter

The Series 340LW BTU transmitter is an economical, compact device for sub-metering applications requiring addressable network output capabilities using the LonWorks® protocol.


  • Onboard microcontroller and digital circuitry make precise measurements and produce accurate, drift-free outputs
  • Calibration information for the flow sensor, type and pipe size may be preselected or entered in the field


  • Calculates thermal energy using the signal from a flow sensor installed in a closed pipe system
  • Communicates via a single two-wire bus
  • Compact cast epoxy body



DI Product Software: Ver 3.12 for Windows Xp (sp2 or higher) / Vista (sp2 or higher) / Windows 7

340LW XIF File


Temperature Range
-20...158 °F

Additional Specifications

Application Examples

Irrigation Controllers


Product Resources

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