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I recently read a thread concerning ultrasonic versus magmeter for a landscape irrigation application. I am concerned with a different application; therefore, a new thread appears warranted.
I currently have an existing 12-inch diameter electromagnetic flowmeter installed in line with a 16-inch sanitary sewage forcemain used for customer billing purposes. Ferrous chloride and hypochlorite are injected a distance upstream into the collection system for odor control. It appears the chemical addition, and perhaps additional constituents in the waste stream, contribute to a coating buildup within the magmeter flow tube. I am unsure if both the flow tube and the electrodes are fouled. The meter results are unreliable and drop consistently over time, well out of the expected range. Existing velocities are most likely between 2.5 feet per second and 5.0 feet per second, most likely lower than recommended to prevent coating the magmeter. Downsizing the meter to increase velocity may not be completely viable.
Others have recommended an inline ultrasonic transit-time flowmeter for this specific application. Are there significant drawbacks or fatal flaws in using this meter for this application?
What about ultrasonic doppler versus ultrasonic transit time for use in this application?
Any user experience with this particular scenario?
Any user experience with self-cleaning magmeter electrodes and/or removable magmeter electrodes?
Thank you for any assistance.
I currently have an existing 12-inch diameter electromagnetic flowmeter installed in line with a 16-inch sanitary sewage forcemain used for customer billing purposes. Ferrous chloride and hypochlorite are injected a distance upstream into the collection system for odor control. It appears the chemical addition, and perhaps additional constituents in the waste stream, contribute to a coating buildup within the magmeter flow tube. I am unsure if both the flow tube and the electrodes are fouled. The meter results are unreliable and drop consistently over time, well out of the expected range. Existing velocities are most likely between 2.5 feet per second and 5.0 feet per second, most likely lower than recommended to prevent coating the magmeter. Downsizing the meter to increase velocity may not be completely viable.
Others have recommended an inline ultrasonic transit-time flowmeter for this specific application. Are there significant drawbacks or fatal flaws in using this meter for this application?
What about ultrasonic doppler versus ultrasonic transit time for use in this application?
Any user experience with this particular scenario?
Any user experience with self-cleaning magmeter electrodes and/or removable magmeter electrodes?
Thank you for any assistance.