[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-398196-105":59,"doc-detail-398196-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","applying-k-factors-to-micromanometers-with-flow-calculation-application-note-tsi-114-us","Applying K-Factors to Micromanometers with Flow Calculation - Application Note TSI-114 (US)","","Guidance for using micromanometers that support flow-rate calculations with K-factors. Covers two calculation methods: deriving flow from measured velocity and duct/pipe dimensions (circular or rectangular area) and deriving flow from differential pressure using a manufacturer-supplied K-factor. Explains where velocity is measured via hot-wire sensors or pitot tubes, how duct size inputs are used, and how the instrument performs automatic flow computation after entering the correct units and K-factor.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/applying-k-factors-to-micromanometers-with-flow-calculation-application-note-tsi-114-us/398196/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/applying-k-factors-to-micromanometers-with-flow-calculation-application-note-tsi-114-us/398196.png","ImageObject",300,407,{"name":92,"@type":93},"Pentious","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-09-29","2026-09-27",true,{"@type":102,"interactionType":103,"userInteractionCount":8},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What are the two methods a micromanometer can use to calculate flow rate with K-factors?","Question",{"text":112,"@type":113},"It can calculate flow rate from velocity and duct size, or from the square root of differential pressure using a K-factor entered into the instrument.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How is velocity measured for the velocity-and-duct-size flow calculation?",{"text":117,"@type":113},"Velocity can be measured with a hot-wire sensor or by using a pitot tube attached to the pressure ports.",{"name":119,"@type":110,"acceptedAnswer":120},"Where does the K-factor come from for differential-pressure flow calculations?",{"text":121,"@type":113},"The diffuser or flow-station manufacturer specifies the required K-factor, and TSI Incorporated does not provide K-factors for this measurement.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},398196,1790695858,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":8,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":14,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":24},1374404730887,"https://ap-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","APPLYING K-FACTORS  \nTO MICROMANOMETERS WITH FLOW CALCULATION  \nAPPLICATION NOTE TSI-114 (US)  \nMicromanometers with flow rate capability can calculate flow rate using two different methods. These calculations can include K-factors that are applied to the flow rate. These calculations are done automatically by the instrument when the necessary information is entered.  \nCalculation ofFlow Rate Using Velocity and Duct Size  \nThe instrument can calculate flow rate from velocity and duct size. This type of flow rate calculation applies to any measurement that occurs in a duct or pipe. The velocity in the instrument can be measured using the hot wire sensor or using a pitot tube that is attached to the pressure ports. Velocity is measured by the instrument using a pitot tube that is attached to the pressure ports. The size of the duct or pipe can be calculated off the duct dimensions or entered directly. The equations for this flow rate calculation are as follows:  \n􀟨 (􀝀)2  \nCircular Area = A = ~~ ~~  \n4  \nRectangular Area = A = (􀝔)(􀝕)  \nFlow rate = v * A  \nWhere: A = area  \nd = diameter of duct  \nx = horizontal dimension of duct  \ny = vertical dimension of duct  \nv = velocity  \nCalculation ofFlow Rate Using Differential Pressure and a K-Factor  \nThe instrument can calculate flow rate from the square root of differential pressure and a K-factor. This type of flow rate calculation applies to measurements made on diffusers or flow stations with pressure taps designed for this purpose. Differential pressure is measured by the instruments using the pressure ports. The K-factor must be entered into the instrument. The equations for this flow rate calculation areas follows:  \nWhere p = differential pressure Kf = K-factor  \nThe source of the K-factor for this type of measurement is the manufacturer of the diffuser or flow station. These manufacturers specify the K-factor that must be used when making flow measurements using the pressure taps. Several K-factors are usually supplied, depending on the pressure and flow rate measurement units that are being used.  \n\n| NOTE |\n| --- |\n| TSI® Incorporated does not provide K-factors for this measurement. The K-factors must come from the manufacturers of the diffusers or flow stations through which the flow is being measured. |\n\nExample  \nYou are making a flow measurement using a diffuser with pressure taps. The manufacturer of the diffuser specified the K-factors listed in the table below.  \nManufacturer-Supplied K-Factors  \n\n| K-Factor | Pressure Units | Flow Units |\n| --- | --- | --- |\n| 112.3 | inches H2O | ft3 / min |\n| 3.36 | Pa | l/s |\n| 139.5 | mm Hg | m3 / hr |\n\nTo make this measurement, select pressure/K-factor in the Flow menu and enter the K-factor (112.3 or 3.36 or 139.5, depending on the pressure and flow rate units). The instrument automatically calculates the flow rate.  \nIf the differential pressure measurement was 0.876 inches H2O and the K-factor entered was 112.3, the flow rate displayed by the instrument would be:  \nFlow Rate = (sq root of 0.876)(112.3) = 105.1 ft3 / min  \nIf the differential pressure measurement was 218 Pa (0.218 kPa) and the K-factor entered was 3.36, the flow rate displayed by the instrument would be:  \nFlow Rate = (sq root of 218)(3.36) = 49.6 l/s  \nIf the differential pressure measurement was 1.64 mm Hg and the K-factor entered was 139.5, the flow rate displayed by the instrument would be:  \nFlow Rate = (sq root of 1.64)(139.5) = 178.6 m3 / hr","cbCainRewNaTI45t","https://ap.wps.com/l/cbCainRewNaTI45t","pdf",212735,"English","# Calculation of Flow Rate Using Velocity and Duct Size\n## Circular and Rectangular Area Equations\n# Calculation of Flow Rate Using Differential Pressure and a K-Factor\n## K-Factor Source and Units\n# Example Flow Measurements with Entered K-Factors","[{\"question\":\"What are the two methods a micromanometer can use to calculate flow rate with K-factors?\",\"answer\":\"It can calculate flow rate from velocity and duct size, or from the square root of differential pressure using a K-factor entered into the instrument.\"},{\"question\":\"How is velocity measured for the velocity-and-duct-size flow calculation?\",\"answer\":\"Velocity can be measured with a hot-wire sensor or by using a pitot tube attached to the pressure ports.\"},{\"question\":\"Where does the K-factor come from for differential-pressure flow calculations?\",\"answer\":\"The diffuser or flow-station manufacturer specifies the required K-factor, and TSI Incorporated does not provide K-factors for this measurement.\"}]","Applying K-Factors to Micromanometers with Flow Calculation - Application Note TSI-114 (US) | PDF",1790473466]