ASL AQFlow Inc.
Acoustic Scintillation Flow Meters for: turbine efficiency at hydro-electric plants, low head dam flow measurements, spillway discharge measurements, flow monitoring at short intake power plants
http://www.aqflow.com/

Pumphlo Co.
The PF 100 PUMPHLO Flowmeter is designed to totalize flow in intermittent pumping applications such as lift stations or tank filling with pumps controlled by level switches.
http://www.pumphlo.com

Measurement Technology
National laboratory for most of the measurement quantities of the SI system; electricity, electrical power, optoelectronics, length, geometry, time, mass, force, pressure, volume, flow and temperature, at the Swedish National Testing and Research Institute, Borås, Sweden.
http://www.sp.se/en/areas/measurement/Sidor/default.aspx

Open Channel Flow Measurement Software
LMNO Engineering website interactive open channel flow measurement calculations software
http://www.lmnoeng.com/Waterfall/

Milltronics Process Instruments Inc.
Portal Process Automation - Siemens - The world of process automation
http://www.milltronics.com/

Flow Technology
Flow Technology provides flowmeters, flow measurement, flow sensors and flow calibration services for a wide range of industries.
http://www.ftimeters.com

Keison Products
The Prosonic Flow ultrasonic flow measurement, a clamp-on ultrasonic measurement.
http://www.keison.co.uk/endress/endress1.htm

Unit Conversion Tool
Convert between 2200 units in 78 measurement categories. Includes units for length, mass, temperature, volume, area, speed, pressure, energy, power, force, fuel consumption, flow and torque.
http://www.accelware.com/Unit_Conversion_Tool/

Arkon Flow Systems
ARKON FLOW SYSTEM
http://www.arkon.co.uk/

Flow Media, Inc.
Flow Media, Inc. Process instrumentation and controls - Flow Meters, Level Controls, Instrumentation, Valves and Controls
http://www.flowmedia.net/