Overview

North America's #1 selling thermal mass flow meter(2009 Flow Research, Boston MA) delivers precise measurements with heavy-duty industrial gas mass and air flow meter measurement applications. Choose from a wide variety of inline and insertion thermal mass air/gas flow meters for precision SCFM (standard cubic feet per minute), SFPM (surface feet per minute) and SMPS (standard meters per second)  measurement of gas mass flow rate in industrial environments.

Product Benefits

• Features our patented zero drift DrySense™ velocity sensor:Watch video...

• Lifetime warranty on sensor

• Sierra's state-of-the-art ISO 9000 closed loop calibration facility matches each application for best accuracy

• Greenhouse Gas (GHG) certified to meet EPA (40 CFR Part 98)

• Optimized (CH4) as well as N20, SF6, HFCs, PFCs and CO2, per the EPA mandate

• Popular choice for landfill gas (LFG) measurement at low pressure (20 - 40 mBarg) and about 40-60°C (100°F) variable flows require a large turndown

• Flow-range adjustment and validation and diagnostics

• Dual-range capability

• Field validation/configuration to assure operating performance:Watch video...

• Field rangeability

• Flow totalizer and alarms

• Large LCD display and pushbutton interface, remote enclosure mounting available

• Small-diameter, 3/4 in. (19.1 mm) sensor probe

• Range of process connections (including hot tap)

• Pipe/duct sizes up to 72 inches (2M)

• An inline flow conditioned version is also available - Model 780S

• Very low pressure drop

• No moving parts

• Free computer interface software:Download now...

• Digital communications: Foundation Fieldbus, HART, Modbus RTU, Profibus DP

• Custom options available:

• Wide range of process connections

• Low and high pressure hot tap

• High temperature option 750°F (400°C)

• Self-cleaning purge  for dirty flow environments

• Axial probe design for dirty flow environments

• Longer probe lengths

• Multipoint flow averaging arrays for very large ducts

Specifications

1. Accuracy: +/- 1% of reading plus +/- 0.5% of full scale

2. Repeatability of +/- 0.2% of full scale

3. Flow range to 20,000 sfpm (100 smps)

4. Turndown: 100:1 

5. Measure all inert gases and all non-condensing clean gases

6. Flammable gases: methane, propane, hydrogen, digester gas, natural gas

7. Corrosive gases compatible with 316L stainless-steel

8. 100:1 turndown

9. Gas temperature -40°F (-40°C) to 350°F (200°C)

10. Ambient temperature -40° F to 120° F (-40° C to 50° C)

11. Response time is one second to achieve 63% of final value

12. Power supply 18 to 30 VDC (regulated), 625 mA maximum; 100 to 240 VAC, 50/60 Hz, 15 watts maximum

13. 316 stainless steel construction

14. Output signals: RS-232, 0 to 5 VDC, 0 to 10 VDC, 4 to 20 mA  

15. User definable pulse output for totalized flow

16. Digital communications: Foundation Fieldbus, HART, Modbus RTU, and Profibus DP

17. Hazardous-Area Location Enclosure (IP66) and NEMA 4X (IP65)

18. Approvals:

19. FM (USA) Class I, Div I, Groups B, C,

20. CSA and CRN (Canada)

21. ATEX

22. CE

23. PED (EU)

24. Chinese Pattern Approval (China)

25. GOST R (Russian Federation)