As Nesteknik, our mission is to develop sustainable and efficient technologies with innovative engineering solutions.
Contact Us Nesteknik Kimya San. ve Tic. Ltd. Şti.Media Compatibility:
Biogas
Digester Gas
Methane
Methane Composition Gases
Natural Gas
Air
Compressed Air
Nitrogen
| ST51 | ST51A | |
| Dual 4-20 mA outputs | ■ | ■ |
| 4-20 mA per NAMUR NE43 | ■ | ■ |
| HART or Modbus I/O | ■ | |
| 500 Hz pulse output | ■ | ■ |
| Process operating temperature | To 250°F [to 121°C] | To 350°F [to 177°C] |
| Maximum remote distance | 50' [15 m] | 100' [30 m] |
| SIL compliance rating | ■ | |
| WarrantyStandard | 1 year | 2 years |
Agency Approvals:
| FM, FMc: | Class I, Division 1, Groups B, C, D; T4 Ta = +60°C; Type 4X, IP66 Class II/III, Division 1, Groups E, F, G; T4 Ta = +60°C; Type 4X, IP66 Model ST51 also includes: Nonincendive for Class I, Division 2, Groups A, B, C, D; T4 Ta = +60°C; Type 4X, IP66 |
| ATEX: | Zone 1, Zone 21 II 2 G Ex db IIC T6...T1 Gb II 2 D Ex tb IIIC T85°C... T300°C Db; IP66/IP67 Ta = -40°C to +65°C |
IECEx: (EQM/ECAS) | Ex db IIC T6...T1 Gb; Ex tb IIIC T85°C...T300°C Db; IP66/IP67 Ta=-40°C to +65°C |
| Other: | EAC (TRCU) Russia, Kazakh MPA (Kazakhstan), NEPSI, CE Marking, CRN |
| SIL (ST51A): | SIL 1 compliant; Safe Failure Fraction (SFF) 78.5% to 81.1% |
Pipe/Line Size Compatibility: 2 1/2" to 24" [64 mm to 610 mm]
Flow Rate: 0.3 SFPS to 400 SFPS [0,08 MPS to 122 MPS]
Accuracy: (at calibrated conditions)
Standard: ± 2% reading, ± 0.5% full scale
Optional: ± 1% reading, ± 0.5% full scale
Temperature Coefficient: (at calibrated conditions)
With optional extended temperature compensation; valid from 10% to 100% of full-scale calibration
Flow: Maximum ± 0.015% of reading/ºF up to 350ºF [±0.03% of reading/ºC up to 177ºC]
Repeatability: ± 0.5% reading
Temperature Compensation:
Standard: 40°F to 100°F [4°C to 38°C];
Optional: 0°F to 350°F [-18°C to 177°C]
Turndown Ratio: 3:1 to 100:1
Warranty:
ST51: 1 year
ST51A: 2 years
Flow Element
Installation: Insertion
Type: Thermal dispersion
Material of Construction: 316 stainless steel body with Hastelloy-C thermowell sensors, 316 stainless steel compression fitting with teflon or stainless steel ferrule, optional 316 stainless steel packing gland.
Pressure (Maximum Operating without Damage):
Stainless steel ferrule: 500 psig [34 bar(g)]
Teflon ferrule: 150 psig [10 bar(g)]
Packing gland: 500 psig [34 bar(g)]
Operating Temperature:
Stainless steel ferrule
ST51: 0°F to 250°F [-18°C to 121°C]
ST51A: 0°F to 350°F [-18°C to 177°C]
Teflon ferrule: 0°F to 200°F [-18°C to 93°C]
Process Connection:
Compression Fittings: 1/2 ″ MNPT or 3/4 ″ MNPT with stainless steel or Teflon ferrule
Retractable Packing Gland: Medium pressure 500 psig [34 bar(g)] with 1/2 ″ MNPT or
3/4 ″ MNPT, and either graphite or Teflon packing
Teflon packing is required if media is ozone, chlorine, or bromine
Insertion Length (Field Adjustable):
1" to 6" [25 mm to 152 mm]
1" to 12" [25 mm to 305 mm]
1" to 18" [25 mm to 457 mm]
Flow Transmitter
Enclosure:
Rating: NEMA 4X, IP66/IP67
Material:
Standard – Polyester powdered coated, ≤0.4% CU, low/no copper content*2 aluminum
(*2: Standard effective April 2023)
Optional – 316 stainless steel
Conduit/Cable Port: Dual 1/2″ NPT or M20x1.5
Operating Temperature: 0°F to 140°F [-18°C to 60°C]
Input Power:
DC: 18 Vdc to 36 Vdc (6 watts max.)
AC: 85 Vac to 265 Vac (12 watts max.; CE Marking approval from 100 Vac to 240 Vac)
Analog Output Signals: Dual 4-20 mA, user assignable to flow rate and/or temperature and a 0-500 Hz pulse output for total flow; output #1 has fault indication per NAMUR NE43 guidelines, user selectable for high (> 21.0 mA) or low (< 3.6 mA)
Bus Communications (ST51A):
HART: Version 7. FieldComm Group certified; available over output #1; DD file included.
Modbus: RS485 (RTU and ASCII). Standard MS (16 bit), Standard LS (16 bit) and Daniel extension (32 bit).
Communication Port: RS-232C
Digital Display (Optional): Two-line x 16 character LCD; displays measured value and engineering units; top line assigned to flow rate, second line user assignable to temperature reading, as flow totalizer or alternating; display can be rotated in 90° increments for optimum viewing orientation
Installation and Mounting: Integral with sensor element or remote mountable
up to 50′ [15 m] with Model ST51, and up to 100′ [30 m] with Model ST51A
