What is a Velocity-based Flow Meter?
Velocity-based Flow Meter able to directly measure fluid velocity, therefore capable of inferring volumetric flow rate of fluid in a pipe.
Weirs and Flumes Flow Measurement
Open-channel flow meter is weir, which is nothing more than a dam obstructing passage of liquid through channel. Study Weirs and Flumes Flow Measurement.
What is a Variable Area Flow Meter?
An example of a variable area flow meter is the rotameter, which uses float as a flow indicator, suspended in the midst of a tapered tube.
Runaway Processes
A classic “textbook” example of a runaway process is an inverted pendulum: a vertical stick balanced on its end by moving the bottom side-to-side. Inverted pendula are typically constructed in…
Gas Flow Formulas
Gas Flow Units MMSCFD - Million standard cubic feet of gas per day - a common volume of gas measure (unit abbreviation MMscf) SCFD - Standard cubic feet per day (gas) SCFM - Standard cubic feet…
RS485 Serial Communication
RS232, RS422, RS423 and RS485 are serial communication methods for computers and devices. RS232 is without doubt the best known interface, because this serial interface is implemented on almost all…
Flow Meter K-factor and Calculations
What is Flow Meter K-factor ? The K-Factor expressed in pulses per unit volume, used to calculate the volumetric flow rate from flow meter.
Integrating Processes – Liquid Level Control
A good example of an integrating process is liquid level control, where either the flow rate of liquid into or out of a vessel is constant and the other flow…
Modbus : History, Structure, Modes, Addressing, Functions
Modbus primary purpose was, of course, to exchange data between PLCs and other devices in the industrial plants.
Self-regulating Processes – Liquid Flow Control
If a liquid flow-control valve is opened in a step-change fashion, flow through the pipe tends to self-stabilize at a new rate very quickly. The following illustration shows a typical…
