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ST51/ST51A Mass Flow Meter
Brand: Fluid Components International LLC (FCI)/ST51-ST51A-Mass-Flow-Meter/002_FCI_ST51-ST51A_Mass_Flow_Meter.png)
The ST51 Series Flow Meter is an accurate, easy to install, no moving parts solution for measuring and controlling biogases, digester gases, methane and natural gas flow.
ST51 utilizes FCI proven thermal dispersion technology to provide direct mass flow measurement resulting in higher performance than orifice plates, DP, Vortex shedding and other thermal devices. The ST51 Series installs in line sizes ranging from 2" to 24" (51 to 610 mm) with 1/2" or 3/4" NPT.
The ST51 uses precision, lithography structured platinum RTD sensors embedded in FCI’s equal mass small diameter thermowells. Combined with microprocessor electronics and precision calibration, the ST51 achieves excellent accuracy, fast response and virtually maintenance free operation.
Features- Triple outputs - Dual 4-20 mA Analog, pulse for totalizer
- HART I/O (Model ST51A)
- No moving parts, non-clogging
- Dual line, rate and totalizer, digital display
- Small, compact design
- Easy to install
- Hazardous location approved
- Integral and remote mount
- SIL compliant
Specifications
Accuracy
- ± 1 % of Reading, ± 0.5 % of Full Scale
- ± 2 % of Reading, ± 0.5 % of Full Scale
Applications
- Biogas Production & Recovery: Anaerobic Digester Processes, On-Farm Systems, Fermentation Systems
- Coal Mine & Coal Bed Methane Recovery
- Co-Gen Power Systems
- Landfill Gas Recovery Systems
- Wastewater Treatment Plant Digester Systems
Approvals & Certifications
- SIL 1 Compliant, Safe Failure Fraction (SFF) 78.5 % to 81.1 % for ST51A
- ISO 9001
- AS 9100
- ATEX: Zone 1, Zone 21, II 2 G Ex db IIC T6 to T1 Gb, II 2 D Ex Tb IIIC T85° C to T300° C Db, IP66/IP67, Ta = -40° to 65° C
- CE
- CRN
- CSA: Non-Incendive Class I, Div. 2, Groups A, B, C, D, T4 Ta = 60° C Indoor Hazardous (Classified) Locations
- EAC TR CU Russia
- FM, FMc: Class I, Div. 1, Groups B, C, D, T4 Ta = 60° C, Class II/III, Div. 1, Groups E, F, G, T4 Ta = 60° C, Typical 4X/IP66, Class I, Div. 2, Grade A, B, C, D, T4 Ta = 60° C
- IECEX: Zone 1, Zone 21, II 2 G Ex db IIC T6 to T1 Gb, II 2 D Ex Tb IIIC T85° to T300° C Db, IP66/IP67, Ta = -40° to 65° C
Cable Length
- 1 to 100 feet (30 metres) for ST51A
- 1 to 50 feet (0.3 to 15 metres) for ST51
Communication
- HART (Version 7), FieldComm Group Certified for ST51A
- RS-232C
Compensated Temperature
- -18° to 121° C (0° to 250° F)
Conduit Connection
- 1/2” NPT Female
- M20 x 1.5 Female
Display
- Two-Line x 16-Character LCD: Digital Display
Enclosure, Body Material
- 316 Stainless Steel
- Aluminum
Environmental Protection
- IP66
- IP67
- NEMA 4X
Flow Rate
- 0.3 to 400 sfps (0.08 to 122 mps)
Frequency
- Output Signal: 0 to 500 Hz Pulse for Total Flow
Input Power
- AC: 85-265 Vdc (12 W, Max.
- CE Marking Approval: 100-240 Vac
- DC: 18-36 Vdc (6 W, Max.
Insertion 'U' Length
- Field Adjustable Length: 1” to 18” (25 to 457 mm)
Materials of Construction
- Compression Fitting: 316 Stainless Steel
- Ferrule: Stainless Steel
- Ferrule: Teflon
Media
- Air: Compressed Air, Nitrogen
- Gas: Biogas, Digester Gas, Methane, Natural Gas
Mounting
- Integral with Sensor Element
- Remote Mounting
Mounting Position
- Horizontal Top or Side Mount
- Vertical Side Mount
NPT Connection
- 1/2” NPT Male
- 3/4” NPT Male
Operating Pressure
- psig: 150 (kPa: 1,030, bar: 10) - Max.
- psig: 500 (kPa: 3,400, bar: 34) - Max.
Operating Temperature
- Stainless Steel Ferrule: -18° to 121° C (0° to 250° F) - Max.
- Stainless Steel Ferrule: -18° to 177° C (0° to 350° F) - Max.
- Teflon Ferrule: -18° to 93° C (0° to 200° F) - Max.
- Transmitter: -18° to 60° C (0° to 140° F)
Output
- Dual 4-20 mA Analog Output
Output Function
- Fault Indication Per NAMUR NE43 Guidelines, User Selectable for High (> 21.0 mA) or Low (21.0 mA) or Low (21.0 mA) or Low (21.0 mA) or Low (21.0 mA) or Low (21.0 mA) or Low (21.0 mA) or Low (21.0 mA) or Low (< 3.6 mA) for ST51A
Pipe Size
- 2” to 24” (51 to 610 mm)
Principle of Operation
- Thermal, Calorimetric
Repeatability
- ± 0.5 % of Reading
Sensor, Probe Material
- 316 Stainless Steel
- Thermowell Sensor: Hastelloy C
Sensor, Probe Type
- Platinum RTD
Temperature Coefficient
- Flow: ± 0.015 % of Reading/°F up to 350° F (± 0.03 % of Rreading/°C up to 177° C)
Turndown
- 3:1 to 100:1
- Wastewater Treatment Plant Digester Systems
- Biogas Production and Recovery
- Anaerobic Digester Processes
- On-Farm Systems
- Fermentation Systems
- Landfill Gas Recovery Systems
- Co-Gen Power Systems
- Coal Mine and Coal Bed Methane Recovery
