Utilizes basic physical principles for drift-free absolute flow measurements

The Model 220 ultrasonic transducers employ reflective sonic transmitters and internal targets for increased measurement accuracy and stability. This monitor accurately measures the time it takes for ultrasound to propagate upstream and downstream through a flowing flue gas.

Product Details

The Model 220 is an ultrasonic transit-time flow meter which utilizes basic physical principles for drift-free absolute flow measurements.

The patented internal targets eliminate measurement error due to temperature / pressure and gas position within the purged air plenum horn assemblies.
Thus, the Model 220 measures only the sound propagation property of the flue gas and not the air purge path.

The ultrasonic transducers of the Model 220 employ reflective sonic transmitters and internal targets for measurement accuracy and stability. These patented features provide the user with unprecedented diagnostics previously not available on an ultrasonic flow meter.

Key Features

• AnalogOutput
• Digital Output
• Multiple Alarms
• Flue Gas Temperature Calculation
• Teflon Coated Transducers
• Diagnostic Internal Reference (patented)
• Configurable via Customer Personal Computer

Specifications

Range	0-163 FPS (0-50 M/S)
Detecable Limit	0.2 FPS
Accuracy Flow (relative to true flow line average)	+/- 0.1 FPS
Response Time	10 seconds
Ambient Temperature	Transducer: -40° to +45°C Controller: 0° to +40°C
Flue Gas Temperature	Up to 450°F (consult factory for higher temperature)
Zero Drift	Less than 0.2%/year
Span Drift	Less than 0.2%/year
Accuracy (temperature)	+/- 5°F
Power	Purge Blowers: 115/208/230 VAC, 50/60 Hz, 1/3 HP, FLA 3.8/1.9 AM; Control Unit and Transducers: 90 watts; Purge Air Heater: 1,000 watts (optional)
Outputs	Digital: RS-232 or 485 Analog: 0-10V or 4-20mA
Alarms	4 (SPST)