Sierra Instruments, Inc.

- Model 620S-BT - Insertion Thermal Mass Flow Meter for Boiler & Heater Efficiency

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BoilerTrak is designed to provide an economical, easy-to-install solution for precise natural gas measurement for heaters and boilers to increase efficiency. The instrument is also suited for compliance with new regulations for burning natural gas and propane in commercial boiler applications.

EPAs GHG & Boiler MACT Certified

The BoilerTrak thermal mass flow meter is also ideal for compliance for Boiler MACT regulations for inlet fuel measurements for area source boilers (40 CFR 63, subpart JJJJJJ) and for major source boilers (40 CFR 63, subpart DDDDD). Learn More

Developed as a fuel measurement solution for customers facing compliance to the California Global Warming Solutions Act of 2006, BoilerTrak™ meets all of the requirements for a stationary combustion fuel meter. This product is optimized for highly accurate and repeatable mass flow metering as mandated by the EPA, including:

  • Methane (CH4)
  • N20
  • SF6
  • HFCs
  • PFCs
  • CO2

Operating Principal: Thermal dispersion technology for direct mass flow measurement featuring: no pressure or temperature compensation needed, no moving parts, low pressure drop, high turndown.

  • Optimized natural and propane measurement for 1, 2, 3, 4 inch sch. 40 pipe sizes
  • Wide flow ranges from 0 to 42,000 scfh
  • Easily install in the field or retrofit
  • Certified for GHG measurement meeting EPA (40 CFR Part 98)
  • Boiler MACT certified for area source boilers (40 CFR 63, subpart JJJJJJ) and for major source boilers (40 CFR 63, subpart DDDDD)
  • Fast delivery—ships next-day from stock

  • Since 2006, over 25,000 units installed on methane, propane, natural gas
  • Greenhouse Gas (GHG) certified to meet EPA (40 CFR Part 98)
  • Smart electronics permit field adjustment of critical flow meter settings
  • 200-millisecond response to changes in flow rate
  • Programmable pulse output for remote totalization
  • Minimal flow blockage and low pressure drop
  • Field flow-range adjustment, meter validation and diagnostics
  • Program transmitter via RS-232 using free user software or with three push-buttons on display interface
  • Sierra's state-of-the-art ISO 9000 calibration facility matches each application to ensure best accuracy
  • Flow-range adjustment and validation and diagnostics
  • Field validation/configuration to ensure operating performance
  • Flow totalizer and alarms
  • 2 x 12 backlit LCD display totalizer value
  • Remote enclosure mounting available
  • Very low pressure drop
  • No moving parts
  • Free computer interface software
  • Certified for Boiler MACT measurement meeting EPA regulations for area source boilers (40 CFR 63, subpart JJJJJJ) and for major source boilers (40 CFR 63, subpart DDDDD)

  • Measure all inert gases and all non-condensing clean gases
  • Accuracy: +/- 1% of full scale
  • Repeatability of +/- 0.2% of full scale
  • Pipe sizes from 3.7' (9.3cm) up to 24' (61cm) 
  • Small-diameter, 3/8-inch (9.5mm) sensor probe
  • Flammable gases: methane, propane, hydrogen, digester gas, natural gas
  • 100:1 turndown
  • Temperature:
    • Gas: -40°F to 176°F (-40°C to 80°C)
    • Ambient: -40°F to 120°F (-40°C to 50°C)
  • Response time is 200 milliseconds to achieve 63% of final value
  • Power supply 15 to 18 VDC (regulated), 625 mA draw maximum
  • Output signals: Linear 0–5 VDC and 4-20 mA
  • User definable pulse output for totalized flow
  • Digital communications solutions include:  Modbus RTU
  • Enclosure NEMA 4X (IP65); remote electronics mounting available
  • CE approved

  • Accuracy of Point Velocity
    • +/- 1% of full scale (actual gas calibration)
    • +/- 1% of full scale +/- 3% of reading (correlation)
  • Repeatability : +/- 0.2% of full scale
  • Temperature Coefficient
    • +/- 0.02% of reading per °F within +/- 50°F of customer specified conditions
    • +/- 0.03% of reading per °F within +/- 50°F to 100°F of customer specified conditions
    • +/- 0.04% of reading per °C within +/- 25°C of customer specified conditions
    • +/- 0.06% of reading per °C within +/- 25°C to 50°C of customer specified conditions
  • Pressure Coefficient : .02% per 7 kpa for natural gas / Methane / Propane
  • Response Time : 200 milliseconds to 63% of final velocity value

Gases

Natural gas, Propane, Methane

Gas Pressure

0 psig to 120 psig (0 to 8 barg) Note: actual gas calibration limited to 30 psig (2 barg)

Pressure Drop

Negligible

Gas & Ambient Temperature

Gas . . . .-40°F to 176°F (-40°C to 80°C)
Note: actual gas calibration limited to 50°F to 100°F (10°C to 38°C)
Ambient . . . -40°F to 120°F (-40°C to 50°C)

Power Requirements

15 to 18 VDC (regulated), 625 mA maximum
Note: no other option available due to safety consideration

Output Signal

Linear 0–5 VDC and 4-20 mA proportional to mass flow rate.

Alarms

Hard contact user-adjustable high and low
Dead band adjustable with Smart Interface software
Relay ratings . . . . . . . Maximum 42 VAC or 42 VDC, 140 mA

Displays

Alphanumeric 2 x 12 digit backlit LCD
Adjustable variables via on-board switches (password protected)
or with Smart Interface software
Adjustable variables. . Full scale (50 to 100 %), Time Response (1 to 7 seconds), Correction factor setting (0.5 to 5), Zero and span

Totalizer

Eight digits (9,999,999) in engineering units
Resettable by software or on-board switches

Software

Smart Interface Windows-based software
Minimum 8 MB of RAM, preferred 16 MB of RAM
RS-232 communication
Additional features. . . Alarm dead band adjustment, Low flow cut-off adjustment, Linearization adjustment, Save / Load configurations, Flow meter validation.

  • Wetted Material:
    • Probe : 316SS
    • Sensor : 304SS, glass coating epoxy
  • Enclosure : NEMA 4X (IP65) powder-coated cast aluminum
  • Electrical Connections : One 1/2-inch female NPT
  • Mounting : 3/8-inch tube compression fitting with 1/2-inch male NPT
  • Certifications : CE approved

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