FS10i Natural Gas Flow Meter

The FS10i is a compact, economical solution to natural gas flow metering. Utilizing application proven thermal mass flow technology, the FS10i provides a highly accurate and repeatable linearized 4-20 mA output of flow rate. It was the first thermal flow meter, and is currently the only one, to comply with SIL 2.  Additionally, for applications benefiting from a high or low flow alarm point, the FS10i includes a user programmable 1A SPDT relay output.
 

FS10i Flow Meter Features

  • Direct Mass Flow Measurement
  • Ultra Reliable, No Moving Parts Design
  • User-Programmable 4-20 mA Output and Relay Trip Point
  • Easy Set-Up Via Serial I/O to PC Interface
  • 10 LED Display Array
  • Easy M12 or Cable Gland Connection With Electronics
  • SIL 2 Compliance Rating
  • Optional Div 2 / Zone 2+Zone 22 Approvals

Applications

  • Sub-metering
  • Furnace fuel lines
  • Gas-fired ovens and heaters
  • Gas engine fuel feed
  • Kilns and calciners
  • Boilers

Specifications

Instrument

  • Measuring Principal: Thermal dispersion
  • Fluid Type: Natural gas
  • Range
In-line
   1 ″:    1 SCFM to 50 SCFM [1,6 NCMH to 80 NCMH]

   2 ″:    2 SCFM to 200 SCFM [3,2 NCMH to 320 NCMH]     
Insertion
   Ordering Block 3, Code 3:    1.25 SFPS to 125 SFPS [0,4 NMPS to 38 NMPS]
   Ordering Block 3, Code 4:    4 SFPS to 400 SFPS [1,2 NMPS to 122 NMPS]
 

  • Accuracy:    ± 1.5 % rdg, ± 0.5 % FS
  • Temperature Compensation:   30 °F to 180 °F [-1 °C to 82 °C]
  • Pressure Service: 10 to 50 psi(a) [0,7 to 3,5 bar(a)]
  • Process Connections
         In-line:         1 ″ or 2 ″ pipe tee, FNPT threads
         Insertion:    1/2 ″ MNPT compression fitting with either Teflon or metal ferrule
  • Repeatability: ± 0.5 % of reading
  • Response Time: 4 sec. (1 time constant)
  • Temperature Coefficient For temperatures > ± 30 °F [± 16 °C] 
Maximum ± 0.025 % of reading / °F up to 250 °F [± 0,05 % of reading / °C up to 121 °C]


Flow Element 

  • Materials of Construction (Wetted Parts)
In-line:    316 stainless steel pipe tee; 316L stainless steel flow element with Hastelloy C-22 thermowells
Insertion:    316L stainless steel with Hastelloy-C22 thermowells
  • Operating Temperature:   -40 °F to 250 °F [-40 °C to 121 °C
                                                  Teflon ferrule maximum temperature is 200 °F [93 °C]
  • Operating Pressure
     In-line:          225 psi [15.5 bar]
     Insertion:      500 psi [34 bar]
Teflon ferrule maximum pressure is 150 psig [10 bar(g)]
  • Insertion “U” lengths
   6 ″ [152 mm] with variable insertion depth, 1/2 ″ MNPT compression fitting                                           with Teflon or metal ferrule
   12 ″ [305 mm] with variable insertion depth, 1/2 ″ MNPT compression fitting                                           with Teflon or metal ferrule


Electronics

  • Display
10 segment LED array, sequential lighting related to flow rate and flashing when trip point exceeded
  • Output Signals 
Analog:    4-20 mA *
Relay:    SPDT, 1A @ 24 Vdc, 120 Vac  (ATEX: DC only)
Serial:    RS232C I/O
*    500 ohm maximum load; user scalable, general purpose, uncalibrated output proportional to flow rate for trend monitoring or assignable to temperature; fault indication per NAMUR NE43 guidelines, user-selectable for high (> 21.0 mA) or low (< 3.6 mA) default
  • Instrument Set-up:
Free FCI set-up and configuration software utility program and 3-wire-to-DB9 RS232 dongle are supplied for interface of the FS10i to user's PC. This interface is required to set the 4-20 mA output for the specific line size, flow range, and engineering units, as well as alarm trip point, hysteresis, and trip time delay.
  • Trip Point Hysteresis Control: 0-100% of span
  • Trip Point Time Delay: user settable for 0-65,000 seconds
  • Input Power: 24 Vdc (21.5 Vdc to 30 Vdc); 2.5 watts maximum
  • Operating Temperature: -40 °C to 160 °F [-40 °C to 71 °C]


Enclosure / Housing    

  • Material: stainless steel body; aluminum end-cap/top with polyester overlay and clear, silicone sheath impact guard
  • Protection Ratings
Non-Ex installations:    IP65, IP66, IP67
FM, FMc approved:    NEMA 4X
ATEX, IECEx approved:    IP64 
  • Agency Approvals
FM , FMc             Nonincendive, Class I Division 2 Groups A, B, C, D;
                            Class II, Division 2 Groups E, F, G; Class III, 
                            T4@Ta=71°C, Type 4X

ATEX , IECEx      Nonincendive for gas and dust, Zone 2/Zone 22
                            II 3 G Ex nA IIC T4 Gc, -40°C ≤ Ta ≤ +71°C
                            II 3 D Ex tc IIIC T81 °C Dc, -40°C ≤ Ta ≤ +71°C
                            IP64
Others:               EAC/TR CU

Ingress Protection:     IP65, IP66, IP67 in non-hazardous locations
CE Marking, CRN, complies with Canadian Electrical code requirements of ANSI / ISA 12.27.01-2011 as a single seal device
  • IEC 61508 (SIL):    SIL 2 Compliant with Hardware Fault Tolerance (HFT) of 0; Safe Failure Fraction (SFF) 90% 
  • Warranty: 1 Year

Documents/Downloads

Certification/Approvals

CE FM ATEX IECEx  
 

  • FM , FMc               Nonincendive, Class I Division 2 Groups A, B, C, D;
                                  Class II, Division 2 Groups E, F, G; Class III,
                                  T4@Ta=71°C, Type 4X
  • ATEX , IECEx        Nonincendive for gas and dust, Zone 2
                                   II 3 G Ex nA IIC T4 Gc, -40°C ≤ Ta ≤ +71°C
                                   II 3 D Ex tc IIIC T81 °C Dc, -40°C ≤ Ta ≤ +71°C, IP64
  • EAC/TR CU
  • Ingress Protection     IP65, IP66, IP67 in non-hazardous locations
  • CE Marking, CRN, complies with Canadian Electrical code requirements of ANSI / ISA 12.27.01-2011 as a single seal device
  • IEC 61508 (SIL)    SIL 2 Compliant; Safe Failure Fraction (SFF) 90%