454FTB Series Single-Point Insertion Flow Meter

Brand: Kurz Instruments

The Kurz Series 454FTB is the premier single-point insertion thermal mass flow meter for industrial gas flow measurements.

The 454FTB supports process temperatures from -40° to 260° C and from -40° to 500° C, process pressure ratings up to 300 psig, and a velocity range from 0 to 24,000 SFPM.
Features
  • Built‐in dry gas flow calculation on all flow units for saturated processes
  • Variable CH₄ composition for a CH₄/CO₂ gas mix.
  • Up to five user-selectable pure or mixed gas calibration curves
  • Interchangeable sensor and electronics (single circuit board) - no matched sets
  • Continuous self‐monitoring electronics that verify the integrity of sensor wiring and measurements
  • Zero velocity as a valid data point
  • Sensor does not overheat at zero flow by using a unique constant temperature control method and power limiting design
  • Supports HART, Profibus DP, and Modbus communication protocols
  • Sensor Blockage Correction Factor (SBCF)
  • Flexibility with transmitterattached or transmitter-separate designs
  • Fogging in stacks and around fan inlets can be monitored
  • Accurate and real time digester measurements reveal digester imbalances, enabling early corrective action

Specifications

Accuracy

  • 16-bits
  • Flow Accuracy: ± 1 % of Reading +20 SFPM
  • Temperature Accuracy: ± [0.5 % of Reading +1° C (1.8° F)] for Velocities Above 100 SFPM

Applications

  • Aeration Air & Treat Biogas
  • Boilers & Recovery Boilers
  • Cement Plants
  • Coal Pulverizer Air
  • Compressed Air
  • EPA & AMS Emissions Monitoring
  • Flare Gas
  • Industrial & Process Gases
  • Primary, secondary, Tertiary & Overfire Air
  • Stack & Flue Gas

Approvals & Certifications

  • ATEX
  • CE
  • CRN
  • CSA Class I, Division 1 & 2
  • EMC
  • EN IEC 60079.0, EN IEC 60079-1, EN IEC 60079-15
  • EPA Mandatory GHG Certification: 40 CFR 98.34(C)(1)
  • LVD
  • NAMUR NE43
  • PED
  • RoHS
  • TÜV Rheinland SIL1
  • WEEE

Communication

  • HART (v7 FSK)
  • Modbus
  • PROFIBUS DP
  • RS-485
  • USB

Display

  • Backlight Display

Enclosure, Body Material

  • Aluminum
  • Polycarbonate

Environmental Protection

  • IP54
  • IP66
  • NEMA 4

Flange Material

  • 316L Stainless Steel
  • C-276 Alloy with Abrasion-Resistant Aluminum Titaniu Nitride (AlTiN) Coating
  • C-276 Alloy with PTFE Coating
  • C-726 Alloy

Flange Size - 1" (DN 25)

  • 1" (DN 25) - 150#
  • 1" (DN 25) - 300#

Flange Size - 1/2" (DN 15)

  • 1/2" (DN 15) - 150#
  • 1/2" (DN 15) - 300#

Flange Size - 1-1/2" (DN 40)

  • 1-1/2" (DN 40) - 150#
  • 1-1/2" (DN 40) - 300#

Flange Size - 1-1/4" (DN 32)

  • 1-1/4" (DN 32) - 150#
  • 1-1/4" (DN 32) - 300#

Flange Size - 2" (DN 50)

  • 2" (DN 50) - 150#
  • 2" (DN 50) - 300#

Flange Size - 2-1/2" (DN 65)

  • 2-1/2" (DN 65) - 150#
  • 2-1/2" (DN 65) - 300#

Flange Size - 3" (DN 80)

  • 3" (DN 80) - 150#
  • 3" (DN 80) - 300#

Flange Size - 3/4" (DN 20)

  • 3/4" (DN 20) - 150#

Flange Size - 4" (DN 100)

  • 4" (DN 100) - 150#
  • 4" (DN 100) - 300#

Input Power

  • 24 Vdc ± 10 %, 1 A, Maximum
  • 85-264 Vac 50/60 Hz, 24 W, Maximum

Length

  • Sensor Support Length: 6" to 60" (152 to 1524 mm)

Loop Resistance

  • Maximum

Materials of Construction

  • Sensor Support: 316L Stainless Steel (Standard)
  • Sensor Support: C-276 Alloy (Optional)
  • Sensor Support: PTFE-Coated (Optional)

NACE & NIST

  • NIST

Operating Temperature - Electronics

  • Integral Display: -25° to 65° C (-13° to 149° F)
  • Remote Aluminum Enclosure: -40° to 65° C (-40° to 149° F)
  • Remote Polycarbonate Enclosure: -25° to 50° C (-13° to 122° F)

Output

  • 4-20 mA Optically-Isolated Loop Powered 4-20 mA Output (± 48 Vdc Isolation)

Pressure Rating

  • Up to psig: 300 (barg: 20.68, kPa: 2068.43)

Process Temperature

  • -40° to 260° C (-40° to 500° F) HT
  • -40° to 500° C (-40° to 932° F) HHT

Range

  • Velocity Range: 0 to 70,000 SFPM (325 NMPS)

Repeatability

  • 0.25%

Resolution

  • 16-bits

Sensor, Probe Diameter

  • 1" (25.4 mm)
  • 1/2" (12.7 mm)
  • 3/4" (19.05 mm)

Sensor, Probe Material

  • C-276 Alloy All-Welded Sensor Construction (Standard)

Time Constant

  • Process Temperature Time Constant: 8 seconds for Temperature Changes at 6,000 SFPM (Constant Velocity)
  • Velocity Time Constant: 1 second for Velocity Changes at 6,000 SFPM (Constant Temperature)

  • Aeration Air & Treat Biogas
  • Boilers & Recovery Boilers
  • Cement Plants
  • Coal Pulverizer Air
  • Compressed Air
  • EPA & AMS Emissions Monitoring
  • Flare Gas
  • Industrial & Process Gases
  • Primary, Secondary, Tertiary & Overfire Air
  • Stack & Flue Gas

The rugged design of the 454FTB is built for demanding environments including:
  • Chemical & Petrochemical Processing
  • Power
  • Wastewater
  • Pulp & Paper Mills
  • Cement
  • Nuclear

Any application where durability, accuracy, and repeatability are required, such as:
  • Combustion Control
  • Greenhouse Gas Emissions
  • Air Sampling
  • Stack & Flare Monitoring

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