- Achieve high accuracy +/- 0.75% of reading
- Eliminate drift with patented DrySense™ sensor
- Validate in the field for easy in-situ calibration
- Use qMix software to easily change gas composition in the field and retain accuracy; Download Flare Gas Mass Measuring Tech Note
- Backed by lifetime sensor warranty
- Boiler MACT certified for area source boilers (40 CFR 63, subpart JJJJJJ) and for major source boilers (40 CFR 63, subpart DDDDD), Learn more >
- Part of Sierra's Big-3 iSeries family of flow meter technologies
- The QuadraTherm 640i is the most accurate insertion-probe thermal mass flow meter for air / gas mass flow rate measurement on the market today, achieving gas mass flow rate accuracy never before possible, +/- 0.75% of reading above 50% of full scale. The QuadraTherm 640i air / gas mass flow meter marks an accuracy breakthrough in thermal dispersion technology achieving extreme precision with "percent of reading" accuracy, which for the first time rivals accuracies of Coriolis technology for measuring gas mass flow rate.
Thông số kỹ thuật
- Accuracy: +/- 0.75% of reading above 50% of full scale*
- Repeatability: +/- 0.15% of full scale
- Flow range 0 to 60,000 sfpm (0 to 305 smps)
- Turndown 100:1
- Measure all inert gases and all non-condensing clean gases
- Flammable gases: methane, propane, hydrogen, digester gas, natural gas
- Corrosive gases compatible with 316L stainless steel
- Gas/ambient temperature: -40°F to 392°F (-40°C to 200°C)
- 1-inch (25.4 mm) diameter protective sensor shield option for improved sensor protection. Learn more.
- Response time is three seconds to achieve 63% (one time constant) of final value
- Power supply: 100 to 240 VAC (0.4 Amps RMS at 230 VAC); 24 VDC +/- 10%, 1 Amp
- 316 stainless steel construction
- Output signals: RS-232, 4 to 20 mA flow, 4 to 20 mA temperature, 4 to 20 mA pressure (optional)
- Alarm output (contact SPST/opto relays)
- User definable pulse output for totalized flow
- Digital communications: Foundation Fieldbus, HART, Modbus RTU, and Profibus DP
- Hazardous-Area Location Enclosure (IP66)
- Approvals:
+ cFMus–Explosion proof for Class I, Div I, Groups B,C,D
+ ATEX
+ IECEx
+ GOST R
+ Chinese Pattern
+ CE–European Conformity