Duct flow measurement. These are known as traverse readings.

Duct flow measurement Duct air flow meter overviewSRK-100 series thermal dispersion flow meter is perfect for HVAC duct air flow measurement in large ducts, pipes, hoods, stacks. They give you an economical solution when it comes to reporting and controlling air flow, providing quick or constant measurements of your HVAC System. An Nov 13, 2013 · For combustion air flow measurements, other flow elements or obstructions have been used; these include measuring the pressure drop across an elbow in the ductwork, across a venturi built into the duct, or even across turning vanes in the duct. Course Description This overview will cover a variety of topics including understanding the different types of instruments used for air velocity/airflow measurement, best practices for properly selecting and using them, developing air velocity/airflow correction factors for various applications, and proper application of the AABC standards for air velocity/airflow measurement, including the Paragon HVAC Air Flow Meter and Airflow Measuring Stations can be installed in duct systems to accurately measure supply, return, exhaust, & outside airflow rates. Why do a traverse? Proper air flow within HVAC ducts is essential to good performance. Three air flow measurements using flow meters are taken per radius: on the edge; one-third toward the centre; two thirds toward the centre. Find gas, liquid and steam flow meters for large pipes and ducts up to 72 inches. Jan 10, 2025 · Measuring Instruments: Use an anemometer, flow hood, and manometer to measure CFM accurately. This is particularly useful for duct, since the other flow elements like orifice, flow nozzle, etc. Moved PermanentlyThe document has moved here. Adding a device to measure air flow may sound simple and straightforward. The cross-sectional area of the duct is multiplied by the average air velocity to find the volume per time or flow rate. EPA Standards: The EPA requires at least 15 CFM of outside air in classrooms to maintain healthy ventilation. The difference between the measurements with and without the capture hood over the diffuser is the flow resistance that could affect the readings. Incorrect air flows can’t be conditioned as designed, operating costs increase, and equipment life is shortened. It Air Flow Rate Measurement using a Pitot Static Probe If average duct speeds, or mass or volumetric flow rates are required, it is necessary to perform a Pitot traverse of the duct. Measurement of the flow rate of a Based on these conditions, the air velocity must be averaged over the cross section of the duct to get an accurate measurement. Air Velocity: The speed of air traveling through the duct is essential. In addition to duct measurement, these also include outlet measurement, and filter measurement. Our thermal mass flow meters are designed for easy installation and provide years of The grid lines which lay out the duct flow measurement points are traverses. The other major category of flow is open channel flow, which is the flow of a liquid with a free surface open to atmospheric pressure. Multiply 400 Feet per Minute times the area of the duct, which is . Air flow sensors and air flow meters are suitable for the measurement and control of air flows in ventilation and air-conditioning. Introduction This course is about measurement of the flow rate of a fluid flowing under pressure in a closed conduit. By multiplying air velocity by the cross section area of a duct, you can determine the air volume flowing past a point The flow impacts on one tube pointing directly into the fluid flow that senses the total pressure in the duct or pipe. The Fluke 922 makes airflow measurements easy by combining three tools: differential pressure, airflow, and velocity into a single, rugged meter. In this field, air velocity (distance traveled per unit of time) is usually expressed in feet per minute (FPM). Airflow and Temperature Measurement with Alarm for 4 to 16" ducts with remote display for airflow tracking and measurement applications. Measure air velocity, temperature, and humidity with advanced HVAC air flow meters. The MC 4. M. The products below are commonly used for this application. For rectangular ducts using the equal-area Often, these conditions are achieved through the use of straight duct runs before and after the flow measurement position. Single point and multipoint airflow measurement are possible with the ADC. Free online ductulator for sizing of HVAC ducts. The 3DDAS measures temperature, flow, and pressure and is ideally suited for collecting data in a variety of industrial applications, including: fan performance, stack flow measurement, axial flow, food processing, and anywhere there is flow and where you can put a probe into a duct. It’s better to oversize than undersize ductwork. Proper practices and regulations should be followed by the purchaser to ensure a safe and proper installation. Good measurement is essential to ensure efficient air distribution in a building and the comfort of its occupants. At a basic level, calculating airflow is simple: it involves multiplying the cross-sectional area of the duct by the average velocity of the air. The meter's throat can be designed to meet the flow In order to find airflow from velocity pressure, calculations are required; this is what this Pitot Tube Airflow tool will do for you. Tips and additional resources are included. Accurate measurement of air velocity in HVAC ducts provides the information needed to examine and calculate the optimal airflow in HVAC systems. FLST-C12 Series FLST Duct Mounted Airflow Measurement Station, Flow Station Size (Diameter or Height X Width) - 12" Circular Configurations Options IM - Internal Pressure Connections. We describe the types of devices or instruments used to measure air flow, comparing the features, operation, and accuracy of each approach. In this article, we estimate the flow rate value at a circular pipe section via n multiple velocity measurements. Therefore multiple thermal flow meters are used, and the customer can average these readings in their control system. Duct fittings and accessories, including elbows, transitions, fans, dampers, and plenums will create excessive duct eddies (“turbulence”) and velocity profiles that will add to the uncertainty of measurement for airflow measuring devices. Learn more about Sierra's full line of flow measurement devices. Guide for how to design a ductwork system. Thermal Duct Flow Meters for Air & Gas Rheotherm flow sensing probes for duct gases are easy to install and provide long-term service with little or no maintenance. The amount of required straight duct is generally determined based on the duct conditions such as elbows, takeoffs etc. If the air flows are smaller than intended, the removal of room loads (heating, cooling and substance loads) may not be ensured in certain circumstances. Feb 22, 2016 · Measure air velocity, temperature, and volume flow with just one instrument - the durable testo 405i temperature probe provides reliable measurements and, if combined with the smart probe app, allows remote measurement readings. The Series MAFS uses evenly distributed total and static pressure measuring points to deliver an accurate measurement of velocity pressure in a duct. Higher velocities can increase CFM, but they may also introduce noise and turbulence. There are some sectors, particularly in the industrial field, where flow measurement plays an important role. The duct system provides the best opportunities for accurate airflow measurement due to its controlled dimensions, and the typical obstructions found within a duct system are generally well defined. Three traverses, diameters, evenly spaced at 60° create six pieces of pie in a round duct. Indicating Flow Meters Indicating flow meters measure and display liquid or gas flow rates in real-time, offering precision, reliability, and easy monitoring for industrial and process applications. The flow rates for a design may be as low as 160 C. Can be configured for a wide variety of applications. By piping the total pressure to the high pressure port and the static pressure to the low pressure port of a differential pressure transmitter, the velocity pressure will be measured. Easy to Use Online Ductulator / Duct Size Calculator. Feb 18, 2025 · Master HVAC airflow measurement with our expert guide to traverse measurements in circular and rectangular ducts. Although this article doesn’t reflect any particular technology, the reader can imagine that velocity measurements themselves are carried out with […] Air flow measurements – Register traverse When a supply register is inaccessible, outside the hood specifications, or in question, an airflow traverse is used to verify the hood reading. Measurement of the Introduction: In heating, ventilation, and air conditioning (HVAC) systems, the efficiency of air distribution through ducts is crucial for maintaining comfort, ensuring air quality, and optimizing energy use. Learn step-by-step techniques, industry standards, and best practices for accurate airflow testing and optimized system performance Calculating flow rates through ducts, pipes, hoods and stacks (collectively called ducts for our purposes), has never been difficult. However, collecting that average Reliable air flow measuring through differential pressure & thermal dispersion Air flow meters are perfect for taking accurate measurements of velocity and pressure. The system can be used with multiple probe types including: Installation of the Venturi Meter in the piping may be achieved through welded, threaded, or flanged process connections. com: hvac duct flow meterBTMETER BT-100 Handheld Anemometer, Digital Wind Speed CFM Meter Gauge Air Flow Velocity Tester for HVAC Shooting Drone, Wind Chill, 14℉-113℉ Wind Temperature There are different types of in-line airflow stations that can be integrated into the WHMV duct to measure the WHMV air flow. In Summary: Only the average duct velocity and duct cross section area must be known to determine air flow. To get an average air velocity, a formal pattern of sensing points is taken over the duct cross section. The best way to do this is to measure the air flowing through it to see if Find Duct Flow Meter related suppliers, manufacturers, products and specifications on GlobalSpec - a trusted source of Duct Flow Meter information. The output can be in mass, standard volume or velocity units. Air Velocity Measurement Introduction In air conditioning, heating and ventilating work, it is helpful to understand the techniques used to determine air velocity. Simple, reliable, and cost-effective, but require traversing the duct for accurate average flow measurement. And, poor data collection procedures produce the errors in duct balancing. Oct 5, 2013 · In the event that the air flow is found to be insufficient, steps can be taken to modify the duct system or adjust the fan speed in order to ensure a proper balance between the air flow and refrigeration systems in the equipment. Single or multiple airflow elements are factory mounted and pre-piped in a casing designed for flanged connection to the ductwork. The Airflow Guardian provides real-time, online measurement of duct air flow rates. The Series STRA Duct Mounted Airflow Measurement Stations utilize an airflow averaging element generating a velocity pressure signal similar to the orifice, venturi, and other primary elements. Use this free Ductulator to calculate velocity, pressure loss, Reynolds number and friction for round or rectangular ducts in any unit. Context Evaluation of air flow in duct by velocity measurements Measurement of local velocity(ies) Representative value of the mean velocity from the shape of the velocity profile In today’s smart buildings, where space is precious and mechanical rooms are tightly packed, it’s difficult to find the right conditions for duct flow measurement. Radial holes perpendicular to the flow sense the static pressure in the duct. Larger HVAC ducts require a different set of tools than smaller diameter ducts. Download product guides for assistance and help in locating and installing air flow transmitters and measurement equipment in round, rectangular or square ducts for optimal performance and maximum efficiency. When the duct center velocity is measured with a pitot tube, the average velocity will be approximately Jun 22, 2024 · Finding the rate at which air moves through a space If your home has some kind of air conditioner or fan, you'll want to make sure that it's working effectively. How to Measure Air Flow Do you need to know how to measure air flow for HVAC, Critical Containment, Electronics, or Automotive Applications? Many industries call for the measurement of airflow or air velocity, sometimes with additional requirements for determining air temperature, air pressure, or humidity. No matter how much money you spend on a high-quality HVAC system, the equipment won’t work at its best without properly designed and installed ductwork. Measurements in ventilation ducts Measurements in ventilation ducts Maintaining air flow in ventilation ducts is critical to the operation of the ventilation and air conditioning system. Air flow measurements – Register traverse When a supply register is inaccessible, outside the hood specifications, or in question, an airflow traverse is used to verify the hood reading. Sep 8, 2025 · Explore the importance of CFM in HVAC systems, how to calculate it, its role in comfort and energy efficiency, plus key airflow factors for optimal performance. These duct mounted airflow measuring elements are manufactured with application specific materials. Types of Air Flow Meters: There are several types, including hot wire, vane, cup anemometers, and pitot tube air flow meters, each with unique methods and applications. The log-linear method provides high accuracy (±3%) in flow totalization by measuring air flow closest the edges of the duct space preferentially. Feb 18, 2025 · Accurate airflow measurement is essential for HVAC performance, energy efficiency, and system reliability. Air flow measurement instruments, anemometers, have been limited in the past by time. Then it calculates the corresponding airflow in the duct by helping you determine the duct cross-sectional area. Dec 18, 2023 · Air flow testing can reveal areas where airflow is impeded, leading to inefficient system performance and higher energy costs. This application note explains how to do that. Air Flow Measurement Port Feature Suitable for the maintenance and measurement of air conditioning equipment. Before equipment is charged Feb 27, 2025 · Overview The article provides a comprehensive guide on performing duct size calculations to optimize airflow efficiency in HVAC systems. This consists of aerodynamic shaped foils, which offers a very little resistance to the fluid. Each station type requires an air pressure measurement and uses a unique calibration equation to calculate airflow based on the duct cross-sectional area specific to the particular station where the measurement is taken. Measurement of the flow rate of a Many circumstances warrant measuring air velocities or air flow, and a duct traverse is the most precise method of obtaining that information. Mar 26, 2024 · HVAC ducts are sized based on the required airflow. This involves placing instruments, such as a pitot tube or hot-wire anemometer across the duct's cross-section and taking readings at Flow meter There are different designs of flow meters. The FE-1000 is an insertion type pitot tube HVAC air flow meter designed for quick, easy installation. The space between the inner and outer tubes permits transfer of sensed pressures to the pressure connections on the opposite of the Pitot tube. Select actuators have pressure independent control characteristics combined with an integrated airflow sensor to calculate and deliver designed flow regardless of pressure fluctuations in the system. There are two main patterns for traverse readings: equal-area and log-linear. You’ll use round, flexible ducts or inflexible rectangular ducts for projects. Ducts that are not well designed result in discomfort, high energy costs, bad air quality, and increased noise levels. Before a traverse is conducted, it is necessary to select a suitable location to perform the How to accurately monitor and measure airflow in mines with rotating vane anemometer, velometer, pitot tube, piezoresistive sensors, and ultrasonic flowmeters. Jun 18, 2023 · Air Flow Meter Definition: An air flow meter is defined as a device that measures the rate, pressure, and direction of airflow in ducts or pipes. It is organized in two basic categories – methods recognized by ANSI/ACC/RESNET for grading new residential installs, and other common methods. Enjoy low maintenance and cost-effective ownership. per ton to a high of 1600 C. Steps to Measure: Measure duct size, check air speed with an anemometer, calculate CFM, and use a flow hood for precise readings. It is also available as an anemometer and can be used in a variety of areas. , transition pieces, and variable air supply or exhaust systems. Pitot tubes are generally used for flow measurements of secondary importance, where cost is a major concern, and/or when the pipe or duct diameter is large (up to 72 inches or more). Air Flow in Round Ducts The log-linear traverse for round ducts - three diameter approach. They are usually Lightweight, Durable, & Easy to Install The Model DAFM Duct Air Flow Measuring Probe uses evenly distributed total and static pressure measuring points to deliver an accurate measurement of flows in a duct. Full worked example included with CFD simulations to optimise your design to ensure the highest energy efficiency. Jun 9, 2025 · Pros calculate duct sizes based on flow rate and friction loss. Flow meters if any installed in such cases will be very large, complicated and costly. The FLOWSIC200 is an accurate flow velocity measuring device designed for long-term operation in tunnels or exhaust ventilation ducts. Greenheck airflow measuring products are available with either differential pressure based technology or thermal dispersion technology. ’s patented* Flow Averaging Tubes (FAT™) were designed to provide accurate flow measurement in large pipes and ducts without the expense and complexity of traditional multipoint systems by offering a cost-effective solution for Heating, Ventilation, and Air Conditioning (HVAC) and Variable Air Volume (VAV) applications. Air flow rate measurement instruments for fpm or CFM: this article defines air flow rate or cubic feet per minute (CFM) as the term is used to describe building air conditioners, heating systems, or building air movement rates. Enter flow rate (L/s) and duct diameter (mm) to begin sizing A Venturi flow meter is a type of differential pressure flow meter that generates a flow measurement by measuring the pressure difference at two different locations in a pipe. Feb 22, 2024 · Ready to master the art of airflow measurement? Let this guide you to discover the ins and outs of placing airflow measurement devices. Our state-of-the You measure the velocity at a points in the duct and find the average velocity in the exhaust duct is 400 FPM. Jun 2, 2025 · Duct Dimension: The diameter or cross-sectional area of the duct greatly affects airflow. A duct traverse consists of a number of regularly spaced air velocity and pressure measurements throughout a cross sectional area of straight duct (for a diagram, reference this airflow guide). Air flow and temperature can be easily measured from this port. Accurate fan discharge air flow measurements in short runs Air Monitor’s duct air flow measuring stations are unrivaled in their ability to accurately measure flow in the most challenging situations, such as following a fan's discharge. It emphasizes the importance of accurate measurements and methods, such as the velocity and pressure drop techniques, to ensure proper airflow, reduce energy costs, and enhance overall system performance, supported by various expert insights and case studies The Series MAFS Metal Averaging Flow Sensor is ideal for use with Dwyer® precision air velocity gages, transmitters and switches. The actual velocity requires either a mathematical calculation or a calibrated sensor that directly shows velocity. Thankfully, Paragon’s unique Airflow Measuring Station sensor design removes the need for airflow straightener and long straight duct lengths while also being easy to install with low maintenance requirements. Traverse measurements—taken across the duct cross-section—help determine average air velocity and overall volumetric flow rate. These thermal mass flow meters monitor stack gas, digester gas and vent air. Duct airflow control Reliable measurements for optimum HVAC management Duct measurement is a highly complex process, since its effectiveness depends on the many different configurations of the ductwork. So, here we'll provide some Stack Gas Flow Profile Stack flows are relatively high volume and in large stacks or ducts. Eldridge Products, Inc. A single-point measurement does not give a truly representative sample of the overall flow profile. The typical profile of Calculate velocities in circular and rectangular ducts - imperial and SI-units - online calculator. Choose from our selection of airflow meters, including easy-read flowmeters for gases, flowmeters for gases, and more. In this guide, we integrate best practices with references to ASHRAE Standard 111, ASHRAE Standard 62. Many circumstances warrant measuring air veloci-ties or air flow, and a duct traverse is the most precise method of obtaining that information. Jul 3, 2018 · Duct sizing, duct calculation, duct design, energy efficient ductwork design. per ton. Thermal mass flow meter technology utilizes the relationship between flow rate and cooling effect for direct measurement of mass flow. So, how do you calculate the size of round ducts and rectangular ducts? Normally, engineers use simple software or a ductulator (provided by suppliers) to determine the size of a duct. Flow Meters for Duct Flow are essential tools designed to measure and control the airflow within these systems. This course is about measurement of the flow rate of a fluid flowing under pressure in a closed conduit. With this method, the quality of the flow measurement is very dependent on the location of the velocity measurement points in the duct section. 8 elimo ir Flow Measurement an Control VAV Universal Applications – Volumetric flow control: VAV/CAV, position control (external VAV control), measuring volumetric flow – Air duct pressure control – Room pressure/room pressure volumetric flow cascade Connection/functions Belimo standalone airflow measurement and control actuators with digital communications for rotary, linear, and in-duct applications. The High Beta integrates flow-straightening vanes and a flow-profiling section with the precise measurement accuracy of the VAP Pitot to offer flow conditioning and accurate air flow measurement, even when placed directly downstream of an elbow, damper or other duct obstruction. This article delves into the significance of these flow meters, the Flow measurements in very large pipes and ducts and the establishment of associated measurement accuracy is a challenging task. Utilizing advanced ultrasonic technology, this system ensures precise measurement of air flow and direction, essential for maintaining efficient ventilation. This involves taking measurements at various positions across the duct. A total of eighteen readings accurately describes the air flow rate. It can also be used as a releasing port of air used to clean out the ducts. Oct 15, 2018 · To determine the effect of the resistance and the impact on the accuracy of the measurements, duct traverses should be performed. Airflow Measurement Commercial air conditioning equipment is designed for a particular airflow across the evaporator. 0 is suitable for the measurement of very low air flows, as well as air temperature and humidity readings. We would like to show you a description here but the site won’t allow us. Single or multiple airflow elements are factory mounted and pre-piped in a casing designed for flanged connection to the duct work Amazon. Leads development and publication of technical articles, white papers and educational materials. Use h2x's free Air Duct Velocity Calculator to instantly calculate airflow speed and ductwork area. For insertion flow sensors, this is typically the primary method in which acceptable conditions can be achieved. Supports both metric and imperial units. Applications like cleanroom certification and HVAC balancing depend on accurate data to prevent inefficiencies, regulatory setbacks, and performance issues. Thermal Mass Gas Flow Meters FCI designs, manufactures and sells a broad line of thermal mass flow meters for air and gas flow measurement. Regulatory requirements related to greenhouse gas (GHG) emissions are mandating additional measurements at plants — for example, boiler air flow, fuel flow and their ratio. For each method you will find reference information and quick overviews to help you understand the pros and cons of the method. Combustion Air Flow Measurement. First, it helps you calculate the air velocity based on pitot tube measurements and air density. Integral Flow Straightener, Ideal for Turbulent Measuring Conditions The Series STRA Airflow Measurement Station is easy to install — simply connect the tubing to the station fittings, then to a differential pressure manometer, gage, transmitter or switch. Larger ducts can transport more air, while smaller passages restrict flow. Same and Next Day Delivery. These measurement devices, transmitters, and stations can be easily installed in both new and existing systems. Target Fields HVAC rectangular duct, Circular duct Model / Specifications Catalogue Products List For Rectangular Duct For Circular Duct For Aerofoil is specially designed for flow measurement in square/rectangular duct. A duct traverse is a fundamental skill for obtaining precise measurements of air velocity and volume duct airflow. However, non-professionals AIR FLOW DYNAMICS & DUCT SIZING REFERENCE GUIDE PROCESS Residential Design Process We would like to show you a description here but the site won’t allow us. The closed conduit is often circular, but also may be square or rectangular (such as a heating duct) or any other shape. Now, the question is how to measure cfm in a duct? It will depend on the shape of the duct itself. This cumbersome task requires performing a traverse of the opening, measuring and manually recording the velocity at numerous points, calculating the mean velocity, and then multiplying the mean velocity by the cross-sectional area of the duct or opening to obtain the total volumetric flowrate measurement in cubic feet per minute (CFM) flow rate. HVAC – HOW TO SIZE AND DESIGN DUCTS Air flow problems have plagued the HVAC industry for years. F. This how-to guide explains why and how to conduct a duct traverse, how to insert the measuring device and a step-by-step process of taking the measurements. Air flow sensors are easy to install and measure the total pressure, the static pressure of the air flow and the average air velocity. Download the Probe Placement Guide and access the Probe Placement Tool by clicking the View Source button below. Product Description Series FLST Duct Mounted Airflow Measurement Station The Series FLST Airflow Measurement Station is easy to install — simply connect the tubing to the station fittings, then to a differential pressure manometer, gage, transmitter or switch. The measurement with a thermoelectric anemometer with uni-directional or omni-directional probe with flow ranges as low as 1 or 5m/s. A duct size calculator, commonly known as a ductulator, depends on factors like the size of the space you’re heating or cooling, air flow velocity, friction loss, and available static pressure of the HVAC system. This page provides information on the most common methods for measuring HVAC system air flow. Some people like to use round ducts while others use rectangular ducts. Jan 31, 2024 · Duct features Features used in the airflow measurement single-nozzle ducts and single- and multiple-nozzle chambers that are described in Section 9 include static pressure taps, piezometer rings, and flow straighteners. cannot be used for duct flow measurement. Abstract. Unveil the perfect placement, whether in ducts or plenums and comprehend the design considerations that set your project up for success. To measure a flow in a closed duct, one of the available methods is to explore the velocity field. Read our article to learn How to make a duct traversal airflow measurement to ensure proper airflow in your HVAC ducts. We include a list of air Duct airflow control Reliable measurements for optimum HVAC management Duct measurement is a highly complex process, since its effectiveness depends on the many different configurations of the ductwork. Gaskets are required for flanged in process connections and care must be exercised to ensure that the gaskets are centered so as not to affect the flow profile The Series FLST Duct Mounted Airflow Measurement Stations utilize an airflow averaging element generating a velocity pressure signal similar to the orifice, venturi, and other primary elements. This pressure difference is created by constricting the diameter of the pipe, which causes an increase in flow velocity and a corresponding pressure drop. Users can size Flex, Ductboard, Metal, or Fabric Ducts based on Velocity, Friction loss, or Duct Dimensions. If the airflow is not adjusted to the design amount, the performance of the equipment will not meet design nor will the condi-tioned space meet design. well-designed ductwork Airflow Measurement Stations The air measuring station (AMS) provides accurate airflow measurement and comes furnished with a properly sized pressure transducer that outputs a signal proportional to cfm. Consistent airflow ensures less strain on HVAC components, thereby extending their lifespan. The level of measurement uncertainty reported for this example and the agreement between the two measurement methods demonstrate that the constant-injection technique of the tracer gas dilution method can be applied as an in-dependent comparison or quality check for routine ow measurement fl methods in large-scale exhaust ducts or conduits. Airflow Measurement Airflow measurement helps buildings meet the minimum outdoor air requirements of ASHRAE Standard 62 or California Title 24 by providing accurate monitoring and control of outside air. Compact, durable designs for indoor and outdoor use. Duct Flow Measurement Technologies Pitot Tubes : [Link to a separate page for Pitot Tubes, if you have one, or describe them briefly here] Measure the difference between total pressure and static pressure to determine air velocity. 35 square feet, to find 140 CFM exhaust fan airflow. Application HVAC Duct Traverse As an HVAC consultant, accurately measuring airflow in duct systems is essential for optimizing performance. An Aug 2, 2015 · INTRODUCTION Preso Venturi flow meters are differential pressure flow devices providing highly accurate and repeatable measurements of liquids, gases, and steam. The Venturi flow meter restricts the flow at its throat, increasing the velocity of the fluid, and measures the pressure difference of the unrestricted flow and restricted flow. 1, SMACNA guidelines, and ACCA manuals, providing you Precision matters when it comes to airflow measurement. Data collection, accurately and precisely measuring air velocity across ducts, has been a dificult task. To measure the velocity pressure, connect a Pitot or averaging tube to a velocity sensor and place the tube into the air flow of the duct. A duct traverse consists of a number of regularly spaced air velocity and pressure measurements throughout a cross sectional area of straight duct (see Figure 1). Undersized ducts can lead to all sorts of airflow problems. Discover the best option for airflow measurement systems with the KMC Airflow Measurement System (AFMS). (Figure 1, below). These are known as traverse readings. However, experience reveals that getting accurate readings of flow through a duct may pose challenges and surprises. We are specialised & expert for aerofoil manufacturers. igumc gpjs dtcgpydrp tcpmqp tkckoyx mwf atrqau vawrv reu vqyskt vzpgww qcsqw fituqqs yyjyflb zobqk