Improved 45 degree flow meter for stack emissions

This ultrasonic flow rate meter has been designed for easy Plug-N-Play installation in existing 45° stack monitoring flanges. By merging the electronics and technology of the Model 220 with a housing and flange scheme, the Model 221 can be used with existing blowers and cabling on the stack.

Product Details

The Model 221 is the viable solution for your flow needs. The Model 221 is designed to be Plug-N-Play with other manufacturers' 45° products. You can utilize existing blowers and cabling. Thermo will also support your new install applications or total replacement applications as well.

Thermo's Model 221 compliments your analyzer line-up. Not only will you get a reliable flow meter but you get the commitment of service.

Key Features

• Plug-N Play
• Utilizes Existing Blowers and Cabling

Specifications

Mounting Angle	17 to 45 degrees from horizontal
Mating Flange	4-hole equally spaced on a 7" bolt circle (contact sales for different flange types)
Port ID	3.25 to 6.25in
Flow Range	0 to 160 FPS (0 to 50 MPS)
Flow Velocity Accuracy	+/- 7% of Ref. Method or +/- 2 ft/sec, whichever is greater
Minimum Detectable Limit	0.2 FPS (.06 MPS)
Response Time	10 seconds
Zero Drift	less than 0.2%/year
Span Drift	less than 0.2%/year
Temperature Measurement Accuracy	+/- 5°F (+/- 2.8 °C )
Flue Gas Temperature Range	-40° to 450°F (-40° to 232°C)
Ambient Temperature at Stack Range	-40° to 150°F (-40° to 66°C)
Remote Equipment Temperature Range	30° to 120°F (-1° to 49°C)
Signal Outputs	Digital: RS-232 and RS-485 Analog: 0-10 volts and 4-20 mA
Alarms	2 (SPST) selectable (e.g., flow speed, volumetric flow, signal amplitude, etc.)
Power Requirement	120 watts @ 120 VAC 60Hz (+/- 10%) 120 watts @ 221 VAC 50 Hz (+/- 10%)
Purge System	3.8 amp (1.9 amp start), 1/3 HP
Signal (data) cable	TEI Pn. #12715 18AWG Alpha Pn. #25168 18AWG (or equivalent grade of 18 AWG stranded, eight conductor, cable)