AIRSTRAIGHTENER

[F]

[D]

AIRFLOW

TOTAL PRESSURE[T.P.] TAKEOFF

1/4˝ COMPRESSIONFITTING

[L]

STATIC PRESSURE[S.P.] TAKEOFF

1/4˝ COMPRESSIONFITTING

3.25

[H]

[W]

.25˝ RADIUSBEADED EDGE [TYP]

TOTAL PRESSURE[T.P.] TAKEOFF

1/4˝ COMPRESSIONFITTING

AIRFLOW

STATIC PRESSURE[S.P.] TAKEOFF1/4˝ COMPRESSION FITTING

[L][L+2.5]

TOTAL PRESSURE[T.P.] TAKEOFF

1/4˝ COMPRESSIONFITTING

STATIC PRESSURE[S.P.] TAKEOFF

1/4˝ COMPRESSIONFITTING

8˝ [F][W]

AIRF

LOW

[H]

DUCT MOUNTED AIRFLOW MEASUREMENT STATIONIntegral Flow Straightener, Ideal for Turbulent Measuring Conditions

DWYER INSTRUMENTS, INC. | www.dwyer-inst.com222

The SERIES STRA Airflow Measurement Station utilizes an airflow averaging element generating a velocity pressure signal similar to the orifice, venturi, and other primary elements. Single or multiple airflow elements are factory mounted and pre-piped in a casing designed for flanged connection to the ductwork.Multiple elements are joined together for connection to a differential measurement device (gage, transmitter, etc.) for flow measurement and indication purposes. It has been developed with a honeycomb airflow straightening section for use in duct systems having highly turbulent conditions at the point of measurement.

FEATURES/BENEFITS• Honeycomb airflow straightening section with 1/2 opening by 3˝depth• Low signal-to-noise ratio• Factory mounted and pre-piped in a flanged duct section (casing)• Standard construction includes galvanized casing and 6063-T5 anodized aluminum flow sensors• Standard airflow stations can be operated (in air) continuously in temperatures up to 350°F or intermittently in temperatures up to 400°F

APPLICATIONS• Building air intake and exhaust flow rate measurement• HVAC air flow measurement

SPECIFICATIONSAccuracy: Within 2% of actual flow when installed in accordance with published recommendations.K Factor: 0.97.Velocity Range: 100 to 10,000 FPM (0.51 to 51 m/s).Wetted Materials: Elements: 6063-T5 anodized aluminum; Casings: 16 ga G90 galvanized steel, 3003 aluminum air flow straightener.Temperature Limits: Galvanized casings and aluminum elements 350°F (177°C) continuous operation (in air), 400°F (204°C) intermittent operation (in air).Humidity Limits: All airflow stations 0 to 100% non condensing.Process Connections: 1/4˝ compression fittings.

Flow

Sen

sors

AIR

QU

ALI

TY

DIMENSIONS - CIRCULAR FLANGEStationSize “D”

Flange Thickness

FlangeSize “F”

CasingLength “L”

8˝ - 15˝16˝ - 44˝45˝ - 72˝73˝ & over

.064˝

.064˝

.188˝

.188˝

1˝1-1/2˝1-1/2˝2˝

8˝8˝10˝12˝

DIMENSIONS - OVAL FLANGE (OPTIONAL)StationWidth “W”

Flange Thickness

FlangeSize

*CasingLength “L”

Up to 44˝Over 44˝

.064˝

.188˝1-1/2˝1-1/2˝

8˝10˝

*All oval flow stations without flange have a casing length of 8˝.

DIMENSIONS - RECTANGULAR FLANGEStation Size“H” or “W”

FlangeSize “F”

8˝ - 72˝73˝ & Over

1-1/2˝2˝

––STRA

CONFIGURATIONR – RectangularO – Oval

HEIGHT (IN) x WIDTH (IN)*

x

OPTIONIM – Internal pressure connectionsF – Flange for oval mount station

STRA–C

DIAMETER (IN)*

Rectangular or Oval ModelsCircular Models

SERIES STRA®

Note: When ordering rectangular or oval flow stations, pressure taps will always be located on the longer of the two dimensions.

*Metric dimensions available upon request.

223

Flow S

ensorsA

IR Q

UA

LITY

DUCT MOUNTED AIRFLOW MEASUREMENT STATIONIntegral Flow Straightener, Ideal for Turbulent Measuring Conditions

SERIES STRA®

DWYER INSTRUMENTS, INC. | www.dwyer-inst.com

MODEL CHART - SERIES STRA RECTANGULAR OR OVALSize 8˝ 10˝ 12˝ 14˝ 16˝ 18˝ 20˝ 22˝ 24˝ 26˝ 28˝ 30˝ 32˝ 34˝ 36˝8˝10˝12˝14˝16˝18˝20˝22˝24˝26˝28˝30˝32˝34˝36˝

$318.00--------------

$325.00333.00

-------------

$333.00339.00492.00

------------

$339.00347.00501.00510.00

-----------

$346.00356.00508.00516.00528.00

----------

$353.00360.00514.00525.00537.00547.00

---------

$358.00368.00521.00534.00544.00555.00568.00

--------

$365.00376.00528.00540.00553.00564.00578.00589.00

-------

$374.00382.00547.00557.00568.00578.00589.00600.00744.00

------

$378.00388.00553.00564.00578.00589.00600.00613.00755.00770.00

-----

$386.00397.00562.00575.00588.00598.00610.00623.00764.00783.00796.00

----

$391.00404.00570.00583.00596.00615.00621.00636.00774.00793.00809.00825.00

---

$397.00409.00579.00592.00606.00621.00633.00646.00788.00807.00819.00837.00854.00

--

$404.00419.00588.00602.00616.00631.00646.00657.00798.00817.00833.00850.00865.00882.00

-

$409.00424.00596.00610.00626.00638.00655.00670.00809.00830.00846.00862.00880.00897.00915.00

Note: When ordering rectangular or oval flow stations, pressure taps will always be located on the longer of the two dimensions.

MODEL CHART - SERIES STRA RECTANGULAR OR OVALSize 40˝ 44˝ 48˝ 52˝ 56˝ 60˝ 66˝ 72˝ 78˝ 84˝ 90˝ 96˝ 102˝ 108˝ 114˝ 120˝8˝10˝12˝14˝16˝18˝20˝22˝24˝26˝28˝30˝32˝34˝36˝40˝44˝48˝52˝56˝60˝66˝72˝78˝84˝90˝96˝102˝108˝114˝120˝

$461.00473.00701.00718.00732.00748.00764.00783.00953.00973.00992.00

1012.001031.001052.001073.001307.00

---------------

$473.00492.00724.00742.00757.00774.00793.00809.00973.00996.00

1016.001037.001060.001082.001104.001340.001397.00

--------------

$492.00510.00746.00764.00783.00800.00819.00837.00993.00

1019.001042.001067.001089.001114.001137.001378.001434.001493.00

-------------

$508.00525.00770.00790.00809.00830.00850.00868.00

1016.001044.001069.001093.001118.001143.001170.001411.001473.001536.001599.00

------------

$521.00541.00791.00813.00833.00856.00877.00897.00

1039.001069.001096.001123.001146.001174.001201.001446.001511.001574.001643.001705.00

-----------

$538.00559.00815.00837.00860.00880.00904.00925.00

1062.001093.001123.001151.001177.001204.001233.001482.001551.001615.001686.001751.001819.00

----------

$559.00583.00850.00874.00897.00921.00945.00971.00

1216.001248.001277.001305.001332.001358.001384.001649.001703.001757.001811.001866.001920.002206.00

---------

$583.00607.00882.00907.00935.00962.00989.00

1016.001250.001288.001320.001352.001384.001418.001450.001727.001786.001843.001903.001964.002022.002287.002406.00

--------

$613.00638.00923.00949.00978.00

1007.001037.001069.001290.001328.001364.001397.001433.001469.001502.001811.001875.001936.002001.002065.002128.002375.002498.002629.00

-------

$636.00665.00955.00986.00

1016.001048.001081.001115.001325.001365.001403.001441.001476.001512.001551.001873.001959.002024.002096.002160.002225.002453.002585.002723.002854.00

------

$657.00689.00991.00

1021.001054.001092.001127.001159.001359.001403.001443.001482.001522.001559.001599.001925.002020.002112.002187.002257.002327.002533.002672.002817.002955.003092.00

-----

$681.00713.00

1023.001059.001096.001133.001170.001205.001396.001443.001482.001524.001565.001605.001649.001978.002074.002173.002273.002353.002427.002613.002759.002909.003054.003198.003345.00

----

$705.00742.00

1059.001098.001135.001174.001216.001251.001493.001516.001641.001680.001719.001760.001796.002130.002208.002287.002373.002449.002529.002895.003014.003136.003254.003371.003492.003864.00

---

$728.00748.00

1092.001135.001175.001216.001260.001301.001585.001638.001683.001729.001773.001823.001866.002208.002291.002375.002464.002552.002628.002982.003131.003263.003388.003513.003635.003983.004149.00

--

$729.00751.00

1128.001173.001216.001260.001303.001347.001619.001674.001723.001771.001819.001869.001917.002287.002375.002461.002554.002640.002728.003062.003234.003390.003521.003650.003781.004102.004273.004444.00

-

$774.00774.00

1164.001210.001255.001301.001347.001391.001656.001711.001763.001814.001864.001917.001965.002368.002458.002550.002648.002738.002830.003143.003320.003500.003652.003788.003927.004220.004397.004575.004753.00

Note: When ordering rectangular or oval flow stations, pressure taps will always be located on the longer of the two dimensions.

MODEL CHART - SERIES STRA CIRCULARSize 8˝ 10˝ 12˝ 14˝ 16˝ 18˝ 20˝ 22˝ 24˝ 26˝ 28˝ 32˝ 36˝ 40˝

$389.00 $415.00 $538.00 $563.00 $607.00 $641.00 $675.00 $712.00 $753.00 $798.00 $840.00 $935.00 $1035.00 $1245.00Size 44˝ 48˝ 54˝ 60˝ 66˝ 72˝ 78˝ 84˝ 90˝ 96˝ 102˝ 108˝ 114˝ 120˝

$1368.00 $1959.00 $2105.00 $2259.00 $2421.00 $2595.00 $3244.00 $3424.00 $3781.00 $3986.00 $4202.00 $4425.00 $4655.00 $4896.00Note: All pricing is Schedule b. b Items are subject to Schedule B discounts.

OPTIONSTo order add suffix: Description Price-IM-F

Internal pressure connections (rectangular stations only)Flange (oval stations only)

+$107.00Multiply price by 1.5