The QuadraTherm® 780i is the most accurate inline thermal mass flow meter for air/gas flow rate measurement on the market today, achieving gas mass flow rate accuracy never before possible, +/- 0.5% of reading above 50% of full scale. The QuadraTherm instruments rivals accuracies of Coriolis technology for measuring mass air flow rate with a breakthrough thermal dispersion technology achieving “percent of reading” accuracy.
Change Gas Mixtures in the Field-No Recalibration Needed
QuadraTherm thermal flow meter equipment comes with on board qMix(tm) gas mixing software that allows you to create custom gas mixtures in the field to compensate for gas compositional changes—no costly recalibration needed. Perfect for managing changes in flare gas composition in the field for upstream oil & gas flare gas measuring applications and other applications in which gas composition frequently changes.
«Percent of reading» accuracy, which for the first time rivals accuracies of Coriolis technology
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)
Ideal for high accuracy applications like custody transfer, wastewater treatment, hazardous areas, facilities management and general process control applications
Built-in flow conditioning elements drastically reduce upstream straight-run requirements
Features our proprietary Raptor OS operating system (formerly known as qTherm)
ValidCal™ Diagnostics: Field calibration validation and meter diagnostics to assure operating performance.
Multivariable outputs – gas mass flow rate, temperature and pressure
Total of four gases onboard; capability to change gas (Dial-A-Gas) in the field;
Capability to change pipe size (Dial-A-Pipe®) in the field
Unique multi-gas flow totalizer and alarms
High flows up to 60,000 sfpm (305 smps)
Range of process connections
Very low pressure drop
No moving parts
Free computer interface software
Free Raptor software to create custom gases or mixtures to compensate for compositional changes; upload mixtures to the unit in the field
Connected to the most up-to-date gases in our proprietary Raptor Gas Library, update the instrument via the web
An insertion version for pipes/ducts up to 72 inches (2 m) available – Model 640i
Large LCD display and pushbutton interface, remote enclosure mounting available
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)
Specifications
Accuracy: +/- 0.5% of reading above 50% of full scale*
Repeatability of +/- 0.15% of full scale
Pipe sizes from 1.0″ to 8.0″ (1.3cm to 20.3cm)
Flow range 0 to 60,000 sfpm (305 smps)
Turndown: 1000:1
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
100:1 turndown
Gas/ambient temperature -40°F (-40°C) to 392°F (200°C) *Verified by an independent NIST & NVLAP accredited lab
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, 4-20 mA flow, 4-20 mA temperature, 4-20 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
