d·flux Multiparameter Mass Flow Meter

Overview

d·flux High Flow Accuracy Delivers Revolutionary Performance 

The demands on scientific and industrial flow measurement instruments have never been greater.  Precise measurement of high flows and the ability to make fast and accurate changes between pure gas or gas mixes are crucial. Can you count on the consistent performance of your flow instrumentation in your factory or lab over time?  And will your supplier be there for you if the unexpected happens?

With Sierra’s d·flux, you are getting a reliable high-performance package. Carefully milled from stainless steel or aluminum, d·flux is a multiparameter mass flow device that provides precise measurement outputs for five process variables (mass flow, volumetric flow, temperature, pressure, and density). It relies on true physical calculations from advanced 3D polynomial data tables to deliver the flow data you rely on. These diagnostics make switching gases faster and easier, with absolutely no loss in accuracy.

Monitor and Adjust on the Go 

d·flux’s user-friendly Bluetooth app, Sierra Flow Connector, is available for free from Google Play. It allows you to easily and securely connect to d·flux with your Android mobile device to create and edit profiles (a set of settings). While operating in the field, you can adjust flow range and dynamic range, filter settings, alarms and warnings, and an assortment of other critical parameters.

Wide Application Scope  

d·flux’s proven precision gas control and robust capabilities make it an ideal choice for a wide range of applications including:  

• Hydrogen production:  Applications include fuel cells, generation, storage and transportation, custody transfer, blending, process monitoring and control  
• Biopharmaceutical production: d•flux can be used to culture and grow microorganisms in bioreactors that are later used in medicines, vaccines, and genetic engineering 
• Carbon Capture and Storage: Measure the CO2 produced from the burning of fossil fuels or biomass that occurs in chemical bioenergy plants 
• Nuclear Energy: Use d•flux  to monitor Argon blanketing gas in a welding chamber  
• Gas Injection: Measure CO2 used to adjust pH in bioprocessing and wastewater 

Product Benefits

• One device measures and controls five process variables: mass flow, volumetric flow, temperature, pressure, and density  
• Flow rates up to 1508 slpm (Air) 
• Other gases, according to conversion, Example: Up to 3120 for Hydrogen   
• High Accuracy – Up to +/-0.3% of user full scale and +/-0.5% of measured value 
• Multigas Capability – Pre-program 15 gases and/or gas mixes 
• Monitor and control meter functions conveniently from your mobile device with free Sierra Flow Connector App  
• Available in Stainless Stell or Aluminum Bodies  
• Cost effective- 5 sensor options to meet your budget:  
  • Core sensor (economical solution) for air, nitrogen, oxygen, and argon.  
  • Prime Sensor suitable for all gases (2 versions available)  
  • Gold-plated Prime sensor – ideal for hydrogen (2 versions available)  
• Digital Communications: Advanced Modbus and analog output. PROFINET or EtherCAT available as options 
• Minimize uncertainty with Autotare – dflux controllers detect with an advanced algorithm when there is no flow and then automatically zero (tare) for optimal performance.   
• Custom Application Profiles – Get up to 15 application profiles with d·flux – allows storage of individual application details. Each profile has an individual totalizer 
• Sierra Flow Studio Software – Communicate with d·flux in Microsoft Windows environment through Modbus  

Specifications

• Multiparameter Measurement and Control (mass flow, volumetric flow, temperature, pressure, and density) 
• Accuracy  (5 Sensor options) 
  • A1 Core: ± 0.5% of user full scale ± 1% of measured value
  • B1 Prime: ± 0.3% of user full scale ± 0.7% of measured value
  • B2 Prime high accuracy: ± 0.3% of user full scale ± 0.5% of measured value
    For Hydrogen applications:
  • B3 Prime H2: ± 0.3% of user full scale ± 0.7% of measured value
  • B4 Prime H2 high accuracy: ± 0.3% of user full scale ± 0.5% of measured value User full scale = ~70…100% standard range
• Sensor Options: 
  • Core sensor: suitable for air, nitrogen, oxygen and argon. Only with FKM and EPDM.
  • Prime sensor: suitable for all gases excluding H2. Available with FKM, EPDM and FFKM
  • Prime H2 sensor: suitable for all gases including H2 (gold coated sensor) Only with FKM and EPDM
    Note: All sensors are available with both aluminum and stainless-steel bodies. Prime sensors are also available with a high accuracy option
• Sensor Stability: Less than 0.2% of measured value/year after tare
• Repeatability: ± 0.2% of factory full scale
• Flow ranges: up to 1508 slpm (Air)
• Other gases according to conversion (ex. Up to 3124 slpm for hydrogen) 
  
• Pressure: 1 to 200 psia (1 to 14 bar a)
• Response time: 
  • Meter: 120 msec  
  • Controller: 2000 msec
    Update time mass flow value: 10 msec Sensor sample rate: 1 msec. / 4 msec. with optimized filter settings
• Warm-up Time: <2 seconds for full accuracy 
• Turndown (Dynamic Range):1:100 for most gases; 1:1000 with Automated Dynamics: (meter only) 
  Automated or a fixed dynamic range can be selected during order process. This setting can be changed anytime using the Sierra Flow Connector App.
• Note: The dynamic range is gas and pressure dependent, higher pressures means lower dynamic range.³
• Operation Pressure: 1 to 200 psia (1 to 14 bar a)

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