-
Measurement and Control Basics, Fourth Edition
control elements, and the principles of operation. The chapter on analytical measurements includes conductivity, pH, density, humidity, turbidity, and gas detectors. The flow measurements shown include orifice plates, venturis, wedge meters, pitot tubes, turbine, vortex, magnetic, ultrasonic, coriolis
-
Flow Measurement
of the building in order to measure flow? (At 10 /kWh and continuous operation, a 1.65 psi pressure drop in a 1000 gpm flow will cost $1000 per year in electrical costs.) Another differential pressure type device is the averaging pitot tube. It typically operates on a lower pressure drop, which introduces another
-
Mass Flow Measurement in the Power Industry
these needs. They can make utilities more cost-effective in a variety of applications. Utilities operating coal-fired boilers routinely perform air flow tests to balance flow rates between the pulverizer and the burners. These "clean air" test, normally made with a pitot tube, tend to be time consuming
-
Optimize HVAC and Process System Efficiency by Matching Your Plant and Processes To The Right Flow Measurement Technology
as well as improve the efficiency of. several sub-technologies including orifice plates,. processes. The end result is often better quality at. averaging pitot tubes, venturi's, sonic nozzles and v-. lower unit costs and sometimes proprietary processes. cones. DP flow meters are used to measure
-
What to Expect at Interphex 2007
. This controller offers simplified programming via a Menu key that enables the user to select: security level; set point or set point and alarm operation; auto or manual alarm reset; English or Metric engineering units; pressure, velocity or flow operation; K-factor for use with various Pitot tubes and flow
-
Understanding flowmeters
than the classic and short-form. easily insert pitot tubes into existing piping, minimizing. Venturies. Being proprietary, flow tubes vary in. instal ation costs. One type makes a measurement at a. configuration, tap locations, differential pressure, and. point within the pipeline or ductwork
-
Differential Pressure Meters
Differential pressure meters (DP) include orifice plates, venturi tubes, flow nozzles, cone types, Pitot tubes, target meters, elbow tap meters and rotameters. The basic operating principle of differential pressure flowmeters is that the pressure drop across the meter is proportional to the square
-
Flow Sensors
by a pipe section with an elliptical entrance and nozzle exit. In general, line sizes are 2 in. greater, and accuracy is ±1 to 2%. Flow nozzles are expensive and may cause permanent pressure loss. Pitot tubes provide basic flow measurement for laboratory tasks. A pitot tube consists of a special