ST100A Mass Gas Flow Meters

Specifications

• Measuring Capability

ST1XXA Models: Flow rate, total flow and temperature 
STP1XXA Models: Flow rate, total flow, temperature and pressure

• Basic Styles

ST100A: Insertion, single-point
ST100AL: In-line (spool piece), single-point
ST102AA: Insertion, dual-element averaging system
ST110A: Insertion, single-point with VeriCal™ capability
ST112AA: Insertion, dual-element averaging system with VeriCal™ capability
STP100A: Insertion, single-point with pressure measurement
STP110A: Insertion, single-point with pressure measurement and VeriCal™ capability
 

• Flow Measurement Range

Insertion Style: 0.25 SFPS to 1000 SFPS [0,07 NMPS to 305 NMPS]
ST100AL In-line: 0.0062 SCFM to 838 SCFM [0.01 Nm3/h to 1425 Nm3/h]
Air at standard conditions; 70°F psia and 14.7 psia [0°C and 1,01325 bar (a)]

• Temperature Measurement Range

Up to 850°F [454°C] commensurate with element; see Operating Temperature in Flow Element specification

• Pressure Measurement Range (STP Models)

Available Ranges:
0 psig to 50 psig [0 bar (g) to 3,4 bar (g)]
0 psig to 160 psig [0 bar (g) to 11 bar (g)]
0 psig to 500 psig [0 bar (g) to 34 bar (g)
0 psig to 1000 psig 0 bar (g) to 70 bar (g)]

• Media: all gases that are compatible with the flow element materials

• Accuracy:

Flow: ± 0.75% reading, ± 0.5% full scale
Temperature: ± 2 °F [± 1,1 °C] (display only, flow rate must be greater than 5 AFPS [1,5 m/sec])
Pressure (STP Models): ± 1.0% of span

• Temperature Coefficient

With optional temperature compensation; valid from 10% to 100% of full scale calibration
Flow: Maximum ± 0.015% of reading / °F up to 850°F [± 0.03% of reading / °C up to 454°C]

• Repeatability

Flow: ± 0.5% reading
Temperature: ± 1 °F [± 1°C] (flow rate must be greater than 5 AFPS [1,5 NMPS])
Pressure (STP Models): ≤ 0.1% of span

• Response Time (Flow):  1 sec. to 63% of final value (1 step change) typical with -FP or -FPC type flow element and AST electronics.

• Turndown Ratio

Normally factory set and field adjustable from 2:1 to 100:1 within calibrated flow range; up to 1000:1 possible with factory evaluation of application

• Temperature Compensation

Standard: ± 30°F [± 16°C]
Optional: ± 100°F [± 55°C]

• Calibration: Performed on flow stands using equipment traceable to NIST and ISO/IEC 17025

• Agency Approvals:

Ex-rated pressure transducer STP models:
 

Flow Element

• Material of Construction

All-welded 316L stainless steel; optional Hastelloy-C276

• Operating Pressure

  Insertion Types
  ST Models
  Metal ferrule: 1000 psig [70 bar (g)]
  Teflon ferrule: 150 psig [10 bar (g)] (200°F [93°C] maximum)
  Fixed Connection NPT: 1000 psig [70 bar (g)]
  Fixed Connection Flanged: per flange rating
  STP Models: per above or pressure sensor rating, whichever is less 
  Inline Type (Model ST100AL): 1000 psig [70 bar (g)]

• Operating Temperature (Process)

ST100A, ST102AA Insertion Style
All Flow Elements (– FPC, – FP and – S):
-40°F to 350°F [-40°C to 177°C]
-40°F to 500°F [-40°C to 260°C]
-40°F to 850°F [-40°C to 454°C]
ST110A, ST112AA Insertion Style
– FP Style Flow Element:
-40°F to 350°F [-40°C to 177°C]
-40°F to 500°F [-40°C to 260°C]
STP Series Insertion Style
– FP Style Flow Element:
Standard Pressure Sensor: -32°F to 176°F [0°C to 80°C]
Ex-rated Pressure Sensor: -22°F to 212°F [-30°C to 100°C]
ST100AL In-line Style
– FP and – S Style Flow Element:
-40°F to 250°F [-40°C to 121°C]

• Process Connection:

Compression Fittings Models ST100A and ST102AA only
3/4" or 1" MNPT, stainless steel with adjustable Teflon ferrule or metal ferrule; or flanged tapped and threaded for 3/4" fitting, ANSI or DIN flanges.
Compression fittings not available with 850°F [454°C] temperature versions of ST100A or ST102AA
Low pressure 50 psig [3,5 bar (g)] or medium pressure 500 psig [34 bar (g)] with graphite or Teflon packing material; 1 1/4" MNPT or ANSI or DIN flange
Teflon packing required when process media is ozone, chlorine or bromine.
Remote configuration required with medium pressure packing gland.
Fixed Fittings / All Welded
1" male NPT or ANSI or DIN flange
Insertion Length:
Field adjustable lengths:
1" to 6" [25 mm to 152 mm]
1" to 12" [25 mm to 305 mm]
1" to 21" [25 mm to 533 mm]
1" to 36" [25 mm to 914 mm]
1" to 60" [25 mm to 1524 mm]
Fixed lengths: from 2.6" to 60" [66 mm to 1524 mm]

• ST100AL In-line Flow Tube

Flow element is threaded and keyed in an in-line flow tube, calibrated and supplied as a spool-piece; options include low flow injection tubes and built-in Vortab flow conditioners for optimum low flow rangeability and performance
Size: 1" diameter tubing; 1", 1 1/2" or 2" schedule 40 pipe
Length: 9 nominal diameters
Process Connections: Female NPT, MNPT, ANSI or DIN flanges, or butt weld prepared
Option: Flanges sized for flow tube

• Remote Transmitter Configurations:

Transmitter may be mounted remotely from flow element using interconnecting cable (up to 1000' [300 m])

• Additional Specifications on Pressure Sensor

Standard Sensor	PSI	Bar	PSI	Bar	PSI	Bar	PSI	Bar
Pressure range	50	3,4	160	11	500	34	1000	70
Over Pressure Safety	100	7	290	20	1000	70	1740	120
Burst Pressure	250	17,24	500	34	2500	172	7975	550
Wetted Materials
Connection	316L		316L		316L		316L
Pressure Sensor	PH 13-8 SS		316L		316L		316L

Ex-rated Sensor	PSI	Bar	PSI	Bar	PSI	Bar	PSI	Bar
Pressure range	50	3,4	160	11	500	34	1000	70
Over Pressure Safety	240	16,55	1160	80	1160	80	1740	120
Burst Pressure	290	20	1390	95,84	5800	400	7970	549,5
Wetted Materials
Connection	Stainless Steel		Stainless Steel		Stainless Steel		Stainless Steel
Pressure Sensor	Stainless Steel		Stainless Steel		SS and Elgiloy		SS and Elgiloy

Flow Transmitter

• Operating Temperature

-40°F to 150°F [-40°C to 65°C] (all except dual element models)
Dual-element Models: -40°F to 120°F [-40°C to 49°C]

• Input Power:

AC: 85 Vac to 265 Vac, 50 Hz to 60 Hz; single element; 10 watt; dual element: 13.1 watt maximum
DC: 24 Vdc ± 20%; single element; 9 watt; dual element: 13.2 watt maximum

• Outputs

Analog
Standard: Three (3) 4-20 mA*, 0-1kHz, or 0-10 kHz pulse/frequency 4-20 mA outputs are user assignable to flow rate, temperature and/or if so equipped, pressure; outputs are user programmable to full flow range or subsets of full flow range; pulse/frequency output is user selectable as pulse for external counter/flow totalizer, or as 0-1 kHz or 0-10 kHz frequency representing flow rate
* Outputs are isolated and have fault indication per NAMUR NE43 guidelines, user selectable for high (>21.0 mA) or low (<3.6 mA) 
Digital
Standard: HART (v7 compliant), Modbus 485,  USB, Ethernet (as service port)
Optional: Foundation fieldbus H1 or PROFIBUS PA
(* ST100A Series are certified by and registred with FieldComm Group (HART and Foundation fieldbus organizations)

• Auxiliary Inputs: Two 4-20 mA input channels; used for FCI administered special configurations to allow ST100A Series to accept inputs from external devices such as gas analyzers, gas composition or pressure sensors
• Enclosures:

Main Transmitter / Electronics:
NEMA 4X, IP67; polyester powder coated, ≤0.4% CU, low/no copper content*² aluminum or optional in stainless steel; 4 conduit ports threaded as 1/2" NPT or M20x1.5; 7.74" x 5.40 " x 5.00" [196,6 mm x 137,2 mm x 127 mm].                         (* standard effective April 2023)
Local Enclosure (Remote Configuration):
Model ST100AL, Models ST100A and ST102AA without packing gland option:
  NEMA 4X, IP67; polyester powder coated, ≤0.4% CU, low/no copper content*² aluminum; 2 conduit ports threaded as 1/2" NPT or M20x1.5; 3.75" x 4.00" x 3.24" [95 mm x 102 mm x 82 mm]
Models ST100A and ST102AA with packing gland option; ST110A, ST112AA and                      all STP Models:
  NEMA 4X, IP67; polyester powder coated, ≤0.4% CU, low/no copper content*² aluminum; 1 conduit port threaded as 1" NPT or M20x1.5; 5.40" x 4.82" [137.2 mm x 122 mm]

All models with stainless steel enclosure option:
NEMA 4X, IP67; stainless steel; 1 conduit port threaded as 1" NPT or M20x1.5; 5.40" x 4.82" [137.2 mm x 122 mm]
(*2:  Standard effective April 2023)
 

• Data Logger: User programmable for readings per time increment to a maximum of 1 reading/second; removable, circuit board-mountable 8GB micro-SD (secure digital) memory card supplied; stores approximately 80M readings in ASCII comma-separated format
• Readout/Display and Optical Touch Buttons (Optional):
  • Large 2" x 2" [50 mm x 50 mm] LCD; digital plus bar graph and engineering units
  • Digital displays of flow rate, total flow, temperature and pressure (with STP models); user selectable for engineering units
  • Analog bar graph of flow rate
  • Alarm status indication
  • User programmable 20 alphanumeric character field associated with each calibration group
  • Set-Up & Service mode displays text and service codes
  • Backlighted
  • Four (4) optical touch buttons for user programming of instrument set-up and service interrogation
  • Optical touch button activation through front window – no need to open enclosure to access or activate
  • Display is electronically rotatable in 90° increments to optimize viewing angle

Note: If readout/display not ordered, all user set-up and service diagnostics interrogation must be done via computer link to bus comm and/or USB port.