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We are planning to replace about 25 flowmeters in our SRU due to problem with being oversized. The present flowmeters are useless during start-up since they could not detect low flows. We have thermal mass type of flowmeters for the air, ultrasonic and vortex types for the gas. There was a suggestion in our worksite for us to use the differential pressure type for the change. I would be very glad to receive suggestions from the group.