Gas Velocity Monitor

The VCEM5000/5100 represents the latest generation of CODEL’s unique flow monitors.


The VCEM 5000/5100 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 and periods and window cleaning (typically 1 year).

Features & Benefits

Certified Product

The VCEM 5100 has both TUV and MCERT certification which signifies the accuracy and reliability of its measuring capabilities.

Typical Flow Monitoring Applications

Large Combustion Plants
Small Combustion Plants
Cement Plants
Dust Collectors
FGD Process
SCR and SNCR Process
Energy From Waste
Renewable Energy
Power Generation

Product Specification

Operating PrincipleInfrared correlation
Measuring Unitsm/s, m3/s
Ambient Temperature-20°C to +50°C
Power Supply48V DC from Signal Processor Unit (SPU)
Constructionepoxy-coated aluminium to IP67
Analogue Outputs2 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 DataRS485 MODBUS protocol (Optional)


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