Thiết bị đo lưu lượng khí thải D-FL 220 của hãng DURAG-Đức

D-FL 220: Volume flow measuring system

Suitability tested and certified ultrasonic measuring system to measure the velocity and the volume flow of flue gas or process gas in pipes or ducts, especially for wet and aggressive smoke emissions.



  • Non-contact measuring method
  • Measurement possible below dew point and for high dust concentrations
  • Continuous measurement of normalized volume flow and gas velocity
  • Automatic zero point and reference point control
  • Convenient operation via remote access with web interface
  • Operation with or without control unit
  • Very low maintenance


Suitable for velocity and volume flow measurement

  • Volume flow measuring at low speeds
  • Plants with damp and/or aggressive exhaust gas
  • Volume flow measurement at high dust content


  • Plants requiring official approval acc. to IED 2010/75/EU
  • Plants requiring compliance to 40 CFR 60 US EPA PS6
  • Emission trading of green house gases GHG acc. to 2003/87/EG / MRR
  • Power industry
  • Biomass incineration
  • Waste incineration
  • Cement industry
  • Crematories
  • Process monitoring


Measuring principle Measurement of direction-dependent transition times of ultrasonic pulses, thereof calculation of flow speed and volume flow
Conformities 2010/75/EU
13., 17., 27., 30. BImschV
TA Luft
EN 14181
EN 15267-1, -2, -3
DIN EN 16911-2
40 CFR 60 US EPA PS6
Certificates CE, QAL1 (DIN EN 14181 / DIN EN ISO 14956 / DIN EN 15267-3), MCERTS, EAC
Measuring location In-situ, non-contact. Mounted at stack, measurement across the stack, purged sensors are not in contact with flue gas
Measuring path length 1 … 15 m, temperature dependent
Measuring angle 45° ±15° relative to the flow direction
Self-check, protective functions Automatic internal self-test
Automatic zero- and span check
System components D-FL 220 MK measuring head transmitter
D-FL 220 MK messuring head receiver
D-FL 220 SPF purge flange
D-FL 220 E mounting flange with tube (option)
D-ISC 100 universal operating unit (option)
D-TB 100 terminal box (option)
D-BL pure air unit (option)

Catalogue (pdf): D-FL 220: Volume flow measuring system

Thiết bị đo lưu lượng khí thải VCEM5100 của hãng CODEL-Anh Quốc

VCEM5000/5100 Gas Velocity Monitor

The VCEM 5000/51000 represents the latest generation of CODEL’s unique flow monitors. These systems measure the velocity of stack gases using a highly accurate time of flight measurement that is derived from a cross correlation analysis of the infra-red emissions of the turbulent gas.

Two robust infrared detectors are used for the prime sensing, mounted on the stack or duct typically 1m apart in the direction of flow. High efficiency air curtains are fitted to considerably extend the time between maintenance periods and window cleaning (typically 1 year).

The VCEM5100 has both TUV and MCERT certification which signifies the accuracy and reliability of its measuring capabilities.

Key features

  • Non-contact infra-red sensing
  • Continuous measurement
  • Suitable for hot and dirty gases
  • No limit on upper gas temperature
  • No moving components
  • High availability, low maintenance requirement


Operating Principle Infrared correlation
Measuring units m/s, m3/s
Ambient Temperature -20°C to +50°C
Power supply 48V DC from Signal Processor Unit (SPU)
Construction epoxy-coated aluminium to IP67
Analogue outputs 2 x 4-20mA current outputs as standard, isolated, 500Ω load max, fully configurable
from keypad
Logic Outputs 2 x volt-free SPCO contacts, 50V, 1A max, configurable as alarm contacts
1 x volt-free SPCO contact, 50V, 1A max, for data valid signal
Serial Data RS232/RS485 MODBUS protocol (Optional)

Catalogue (pdf): VCEM5000/5100 Gas Velocity Monitor