Kiel Probes. General Information

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1 Kiel s Generl Informtion Aerodynmic Properties Kiel probes re used to mesure totl pressure in fluid strem were te direction of flow is unknown or vries wit operting conditions. Teir correction fctor is 0 wen used witin te rnges outlined below. Mc Number Rnge True totl pressure is indicted up to Mc Number of 1.0. Tere is sligt drop in yw insensitive rnge bove Mc Number 0.3. Tis decrese verges bout 4% for ll types t Mc Number of 1.0. Reynolds Number Rnge Te probes re insensitive to Reynolds Number except t extremely low velocities for Pitot- Sttic probes. or ir tis limiting velocity is bout 4 ft/sec for te smllest size Kiel probes listed. Time onstnt Time constnt depends on te complete instlltion, probe, pressure lines, nd mnometer. Wit connecting ose up to 20 ft. long nd liquid mnometer of ID, te Type B probe will rec equilibrium reding in pproximtely 15 seconds. Using tis time t s stndrd te oter time constnts for verge stem lengts will be: Type onstnt A 2.4 t, D, H.04 t E,.02 t Yw nd Pitc Angle Rnge Te outstnding dvntge of Kiel probes compred wit oter totl pressure probes is complete insensitivity to direction of flow witin certin limits. Teir yw nd pitc crcteristics re generlly te sme ltoug stem interference on some designs will cnge one from te oter. ig. 1 sows tese flow ngles nd ig. 2 is typicl clibrtion curve of Type A probe. It cn be seen tt te correction fctor equls 0 up to te limits of te yw rnge nd ten drops very srply. Te rnge is rbitrrily defined s te point were te error equls 1% of velocity pressure. Symbols used in tese figures re: Pt: Totl Pressure Ps: Sttic Pressure Ptp: Indicted Totl Pressure Te yw nd pitc rnge for ll types listed below t Mc Number of.25 re: Type Yw Rnge Pitc Rnge A ±52 ±47-40 B ±48 ±45 ±54 ±49 D ±54 ±49 E ±63 ±58 ±67 ±61 R ±54 ±49 Turbulence Errors Turbulence errors re negligible, especilly since te probe is yw insensitive. Very Hig turbulence my cut down te yw nd pitc insensitive rnges owever. igure 1. low Angles igure 2. Typicl librtion urve of Type A Industriesteuerungen GmbH ttp:// e-mil: info@tecmrk.de Kirscstrsse 20 D Müncen Telefon (+49-89) Telefx (+49-89)

2 SELET ROM THESE KIEL MODELS / SPEIIATIONS Ordering Prt Number KAA- Sensing Hed Description Di. Miniture Type KA Dimete r KA- 1/8 KBA- KB- KB- -W Di. Stndrd Type KB Lengt Stndrd Lengts re 6" 8" 12" 24" Yw Rnge ** ± 52 Pitc Rnge ** Time onstnt (Sec.) 36 ± 48 ± Type KA: lernce Hole Dimeter Type KB: lernce Hole Dimeter ** Rnge is defined s te point t wic error equls 1% of velocity pressure. See qulifictions under Time onstnt, front pge. Industriesteuerungen GmbH ttp:// e-mil: info@tecmrk.de Kirscstrsse 20 D Müncen Telefon (+49-89) Telefx (+49-89)

3 SELET ROM THESE KIEL MODELS / SPEIIATIONS Ordering Prt Number K- Sensing Hed Description Di. Venturi Type K Dimete r Lengt Yw Rnge ** Pitc Rnge ** Time onstnt (Sec.) KE- K- K- -W KD- KDE- Di. Venturi Type KD Stndrd Lengts re 6" 8" 12" 24" ± 54 ± ± 54 ± KD- -W Type K: lernce Hole 1/2" Dimeter Type KD: lernce Hole 9/16" Dimeter ** Rnge is defined s te point t wic error equls 1% of velocity pressure. See qulifictions under Time onstnt, front pge. Industriesteuerungen GmbH ttp:// e-mil: info@tecmrk.de Kirscstrsse 20 D Müncen Telefon (+49-89) Telefx (+49-89)

4 SELET ROM THESE KIEL MODELS / SPEIIATIONS Ordering Prt Number KR- KR- KE- KEE- -W KE- Sensing Hed Description Di. Hig-Rnge Type KR 3/8" Di. Venturi Type KE 3/4" Di. Venturi Type K Dimete r Lengt Stndrd Lengts re 6" 8" 12" 24" Yw Rnge ** Pitc Rnge ** Time onstnt (Sec.) ± 54 ± ± 63 ± K- ± 67 ± Type KR: lernce Hole 1/2" Dimeter Type KE: lernce Hole 7/8" 3/8" Dimeter Type K: lernce Hole 1 3/4" 3/4" Dimeter ** Rnge is defined s te point t wic error equls 1% of velocity pressure. See qulifictions under Time onstnt, front pge. Industriesteuerungen GmbH ttp:// e-mil: info@tecmrk.de Kirscstrsse 20 D Müncen Telefon (+49-89) Telefx (+49-89)

5 Boundry Effects Boundry effects re smll s in ll totl pressure probes. However, in steep totl pressure grdients s ner solid boundries or in troug beind guide vnes sift in te effective center of te probe occurs, so te totl pressure mesured corresponds to te stremline 0.5d wy from te geometricl center of te ed in te direction of te iger totl pressure s sown in ig. 3. Instlltion Tese probes re usully instlled troug oles lrge enoug to pss te ed s listed on te Kiel Specifiction pges. See ec individul type for te minimum size. Specil construction including oter mteril, designs to customer s specifictions, specil tke-offs, nd mounting dpters quoted s requested. igure 3. Sift in Effective enter Ordering Informtion Typicl Exmple: KB W K: lss = K (Kiel) All stinless steel construction B: d = See crt nd tble Type A, B,, D, E,, R : = - see crt for rnge in ec type A D 5/32" E H 5/16" J 3/8" 12: = 12" - Overll lengt - inces : m = - Reinforcing tube dimeter (Omit if no reinforcing required) D 5/32" E H 5/16" J 3/8" L 1/2" M 5/8" N 3/4" ) 10: b = Reinforcing tube lengt inces (Omit if no reinforcing required) : e = - Tke-off dimeter (Omit if tke-off is sme size s stem; i.e. A D 5/32" W: Welded for use up to 2,000 Hig temperture brze for use up to 1,500, use N in plce of W. Omit if Welded or Nicrobrz is not required. Stndrd Brze is Silver soldered for use up to 900. Industriesteuerungen GmbH ttp:// e-mil: info@tecmrk.de Kirscstrsse 20 D Müncen Telefon (+49-89) Telefx (+49-89)

6 Kiel Temperture s ombintion Pressure/ Temperture s KT: Specil purpose Kiel Temperture mesures totl pressure nd temperture in one unit. Te Kiel Hed is insensitive to pitc nd yw ngles of flow up to +/- 45. Termocouple s grounded junction wit bleed oles. Exposed nd ungrounded junctions re vilble. Termocouple ccessories nd pressure connectors re lso vilble upon request. Plese consult United Sensor. Ordering Informtion Typicl Exmple: KT-8-K-12- KT: Type KT 8: = 8" Lengt K: Termocouple Wire librtion K: romel Alumel J: Iron onstntn T: opper onstntn E: romel onstntn 12: 12" - Ledwire Lengt : d = Dimeter E Industriesteuerungen GmbH ttp:// e-mil: info@tecmrk.de Kirscstrsse 20 D Müncen Telefon (+49-89) Telefx (+49-89)

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