Series STRA Duct Mounted Airflow Measurement Station

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. Single or multiple airflow elements are factory mounted and pre-piped in a casing designed for flanged connection to the duct work. The Series STRA utilizes an airflow averaging element in a head-type device, generating a differential (velocity) pressure signal similar to the orifice, venturi, and other head producing primary elements. It has been developed with a honeycomb airflow straightening section for use in duct systems having highly turbulent conditions at the point of measurement. Strategically located sensing ports continually sample the total and static pressures when inserted normal to flow. Total pressures sensed by the upstream ports are continually averaged within the airflow element in an isolated chamber. The static sensing ports are averaged in a second isolation chamber. Multiple elements are joined together for connection to a differential measurement device (gage, transmitter, etc.) for flow measurement and indication purposes.

Models & Ordering

Build Your Custom Part. Use our Product Configurator

Specifications

Accuracy:
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.
Coatings:
Herewith VRL 500 phenolic coating Imron 333 polyurethane enamel.
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.

Features

  • Low signal-to-noise ratio.
  • Honeycomb airflow straightening section with 1/2" opening by 3" depth.
  • Multiple total and static pressure sensing ports along the length of the element.
  • Factory mounted and pre-piped in a flanged duct section (casing).
  • ±2% accuracy throughout velocity ranges of 100 fpm and over.
  • 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.
  • All airflow stations can be operated in humidity ranges of 0 to 100%.
  • Standard airflow stations have good salt air resistance and are suitable for most HVAC applications.
  • Great for use where turbulent conditions exist.

Options

  • IM - Internal Pressure Connections.
  • F - (Oval Stations Only).

Model Chart

Rectangular or Oval Models:
EXAMPLE STRA O 12 X16 IM Series STRA-R12X16-IM Duct Mounted Airflow Measurement Station, 12" x 16" oval duct, with internal pressure connections.
SERIES STRA         Duct Mounted Airflow Measurement Station
CONFIGURATION   O
R
      Oval
Rectangular
DUCT HEIGHT     8
10
12
14
15
16
18
20
22
24
26
28
30
32
34
36
37
40
44
48
52
56
60
66
72
78
84
90
96
102
108
114
120
200MM
250MM
300MM
350MM
400MM
425MM
450MM
500MM
550MM
565MM
600MM
615MM
700MM
765MM
1250MM
    8"
10"
12"
14"
15"
16"
18"
20"
22"
24"
26"
28"
30"
32"
34"
36"
37"
40"
44"
48"
52"
56"
60"
66"
72"
78"
84"
90"
96"
102"
108"
114"
120"
200MM
250MM
300MM
350MM
400MM
425MM
450MM
500MM
550MM
565MM
600MM
615MM
700MM
765MM
1250MM
DUCT WIDTH       X8
X10
X12
X14
X15
X16
X18
X20
X21
X22
X24
X26
X28
X30
X32
X34
X36
X39
X40
X42
X44
X48
X52
X56
X60
X63
X66
X72
X78
X84
X90
X96
X102
X108
X114
X120
X250MM
X400MM
X450MM
X500MM
X550MM
X600MM
X615MM
X675MM
X750MM
X770MM
X900MM
X950MM
X955MM
X1000MM
X1100MM
X1200MM
X1380MM
X1470MM
X2400MM
  8"
10"
12"
14"
15"
16"
18"
20"
21"
22"
24"
26"
28"
30"
32"
34"
35"
36"
39"
40"
42"
44"
48"
52"
56"
60"
63"
66"
72"
78"
84"
90"
96"
102"
108"
114"
120"
250MM
400MM
450MM
500MM
550MM
600MM
615MM
675MM
750MM
770MM
900MM
950MM
955MM
1000MM
1100MM
1200MM
1380MM
1470MM
2400MM
OPTIONS         F
IM
1-1/2" Flange for Oval Mount Station Only
Internal Pressure Connections


Circular Models:

EXAMPLE STRA C 12 Series STRA-C12 Duct Mounted Airflow Measurement Station, 12" diameter duct.
SERIES STRA     Duct Mounted Airflow Measurement Station
CONFIGURATION   C   Circular
DUCT DIAMETER     8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
40
44
48
54
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"
54"
56"
60"
66"
72"
78"
84"
90"
96"
102"
108"
114"
120"

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