The VCEM 5000/5100 represents the latest generation of 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).

• 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

• RS485 MODBUS protocol (Optional)

Brochure and Manual availibe on the Downloads page here.