By- Pass Rotameter systems are designed for the accurate measurement of fluid rate of flow in pipelines 25 NB in diameter. They accomplished this by providing a bypass flow that is directly proportional to the main flow. 
 

• Type of tapping: Flange, D and D/2, corner
• Accuracy: +/-2% of full flow
• Range ability: 7:1 or 5:1
• 50NB Line
• Standard ISO 5167
• Size Design Standard: ISO 5167 or BS/1042
• BS/1042