ST80/ST80L Mass Flow Meters

• Direct mass flow measuring
• Flow rate, totalized flow, temperature
• No moving parts, virtually no maintenance
• Patented AST™ thermal measuring mode
• Process temperatures up to 850°F [454°C]
• Analog outputs and bus communications
• Global agency approvals for hazardous Ex installations
• SIL 1 compliant
• Graphical multivariable LCD readout
• 3-point in-situ calibration drift check
• Exclusive wet gas/rain shield sensor option
• Integral or remote mounting
• Aluminum or stainless steel enclosures

• Measuring Capability: Flow rate, total flow and temperature
• Basic Styles

ST80: Insertion, single-point  (for pipe diameters > 2 inches [51 mm])
ST80L: In-line (spool piece), single-point  (for pipe diameters 1 inch to 2 inches [25 mm to 51 mm])

• Flow Measurement Range

Insertion Style: 0.25 SFPS to 1000 SFPS [0,07 NMPS to 305 NMPS]
ST80L 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

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

• Accuracy:

Flow: ± 1.0% 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])

• 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])

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

• Turndown Ratio

Normally factory set and field adjustable from 2:1 to 100:1 within calibrated flow range.

• 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:

* Available in standard and elevated T-ratings

• SIL/IEC 61508: SIL 1 compliant, SFF 71.1% to 79.1%
• Other: Follows best practices and guidelines as set forth in ISO 14511; Complies with ISO 14164

Flow Element

• Material of Construction

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

• Operating Pressure

Model ST80 (Insertion style)
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
Model ST80L (inline style): 1000 psig [70 bar (g)]

• Operating Temperature (Process)

Model ST80 (Insertion style)
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]
Wet gas/rain flow element: -40°F to 350°F [-40°C to 177°C]

Model ST80L (In-line Style): -40°F to 257°F [-40°C to 125°C]

Process Connections:
Compression Fittings Model ST80
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.
Retractable Packing Glands
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: (probe is etched with depth ruler in both inches and mm)
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]

• Model ST80L 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; 1″ schedule 80 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])
Flow Transmitter

• Operating Temperature

-40°F to 150°F [-40°C to 65°C]

• Input Power:

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

• Outputs (Standard, Included)

Analog: Two (2) 4-20 mA* user assignable to flow rate or temperature. Outputs are user programmable to full flow range or subsets of full flow range.
* 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 RS-485 and USB Serial I/O.
  Optional: (Can be added to above) Foundation Fieldbus H1, PROFIBUS-PA, or PROFIBUS-DP
 (Note: Only one bus comm, HART, Modbus, Fieldbus or PROFIBUS can be active at same time)
 

• Enclosures:

Main Transmitter / Electronics:
NEMA 4X, IP66/67; polyester powder coated, ≤0.4% CU, low/no copper content* 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 ST80 without packing gland option and Model ST80L
  NEMA 4X, IP67; polyester powder coated aluminum or stainless steel; 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 ST80 with packing gland option:
  NEMA 4X, IP67; polyester powder coated aluminum or stainless steel; 1 conduit port threaded as 1″ NPT or M20x1.5; 5.40″ x 4.82″ [137.2 mm x 122 mm]
 

• Readout/Display (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
  • Display is electronically rotatable in 90° increments to optimize viewing angle
• Touch Button/Keypad (Optional)
  • Four (4) optical touch buttons
  • For user programming of instrument set-up and service interrogation
  • Activation through front window – no need to open enclosure to access or activate
  • Set and adjust the meter or interrogate diagnostics in-situ, even in Hazardous Ex (Div.1/Zone1) installation.

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