Sierra-InnovaSonic 207i Thermal Energy / BTU Flow Meter

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Sierra-InnovaSonic 207i Thermal Energy / BTU Flow Meter

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The 207i calculates thermal energy/ BTU flow energy and provides you with the highest accuracy measurements possible to manage energy costs. A critical element of any thermal energy/ BTU flow energy measurement is determining the amount of heat transferred between the cold and hot flow legs of an HVAC process.



  • One meter for a wide range of pipe sizes from 2 to 236 inches (5o to 6000mm)
  • Clamp-on or insertion transducers measure bi-directional flow
  • Optional clamp-on or insertion PT 100 temperature inputs for thermal energy/BTU measurement
  • Optional current input modules for pressure, temperature & density
  • Accuracy +/- 0.5% of reading from 0.16 to 40ft/s (0.05 to 12 m/s)
  • Repeatability +/- 0.15% of reading >0.16 ft/s (0.05m/s)
  • Clamp-on transducers operating temperature range: 14°F to 176°F (-10°C to 80°C)
  • Clamp-on high-temperature transducers operating temperature range: 14°F to 302°F (-10°C to 150°C)
  • 1.5 in (38.1 mm) insertion DIA transducers; operating temperature range: -40°F to 176°F (-40°C to 80°C)
  • Keypad with 16 tactile keys with 14 dual-function keys with audible feedback
  • Flow totalizer
  • Memkey: automatically detects sensor type; calculates optimal mounting
  • Internal memory data logger
  • RS-485, RS-232, USB proprietary Sierra Protocol, optional Modbus RTU protocol, and optional BACnet (pending)
  • CE approved
  • NIST traceable calibration certificate
  • Sierra will commission the meter upon request
  • Boiler MACT certified


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