This product is obsolete.
Relevant documents and drawings are listed below. Please contact your local Emerson representative for your measurement needs.
Flexim FLUXUS H721 - Ultrasonic Flow Meter for Standard Volume Flow Measurement
Flexim FLUXUS H721 - Non-Intrusive Ultrasonic Flow Meter for Standard Volume Flow Measurement (Obsolete)

Specs

Measuring Quantities
Flow: Operating volumetric flow rate, standard volumetric flow rate according to ASTM 1250/TP25/4311, flow velocity, mass flow rate

HPI: API gravity, density, normalized density

interface detection: Slope of the HPI physical quantities

Accuracy
Measurement uncertainty of the measuring system (volumetric flow rate): ±0.3 % of reading ±0.005 m/s
Measurement uncertainty at the measuring point (volumetric flow rate): ±1.0 % of reading ±0.005 m/s
Time Constant/Response
Transit time (HPI functions): repeatable: 1/(50 • fα) ±10-4 • t
absolute: 1/(5 • fα) ±10-4 • t

fα - transducer frequency
t - total transit time e.g. for transducers with transducer frequency M (fα = 1 MHz):

repeatable: 20 ns ±10-4 . t
absolute: 200 ns ±10-4 . T
Certifications/Approvals
Transmitter: ATEX/IECEx zone 2
Transducers: ATEX/IECEx Zone 2, FM Class I /Div 2
Power Supply
100 ... 230 V AC / 50 ... 60 Hz
12 / 24 V DC
Output
4 - 20 m+BS13+BT12
Input
Pt100 / Pt1000
4 - 20 mA active / passive
binary
Communication Protocol
Modbus RTU/TCP
HART
Profibus PA
Foundation Fieldbus
Pipe Size
0.24 inch to 255.9 inch
Temperature Range
Pipe Wall: -40°F to +392°F
System Configuration and Installation
For more detailed Information please download the Technical Specifications

Features

  • Advanced Flow and Analytics - Automatic Fluid Identification and Interface Detection
  • Standard Volume Flow Compensation - Pressure & Temperature Inputs
  • Superior temperature stability - Zero drift.  Temperature compensated transducers
  • Robust - "Fit for Purpose" durable mounting fixtures and ATEX/IECEx Zone 2, FM Class I /Div 2 transducers
  • High turndown range - capability of measuring at very low flow rates
  • Bi-directional flow metering

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