# Flow measured on a square root scale

**URL:** <https://forumautomation.com/t/flow-measured-on-a-square-root-scale/74>\
**Category:** Flow Measurement\
**Created:** [October 2, 2014, 6:05pm UTC](https://forumautomation.com/t/flow-measured-on-a-square-root-scale/74 "2014-10-02T18:05:01Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![instrumen](https://forumautomation.com/letter_avatar_proxy/v4/letter/i/65b543/32.png) [@instrumen](https://forumautomation.com/u/instrumen)\
**Post date:** [October 2, 2014, 6:05pm UTC](https://forumautomation.com/t/flow-measured-on-a-square-root-scale/74/1 "2014-10-02T18:05:01Z")

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Flow is measured on a square root scale only when the measurement is done through an orifice plate and a DP transmitter. The flow measured through the orifice plate is always proportional to the square root of the DP across the orifice plate. Q = k  sq root of DP Q = Flow K = Constant DP = Differential Pressure