Temperature Sensors & Thermowells — Saudi Arabia

Temperature Sensors & Thermowells Supplier Saudi Arabia — PT100 RTDs, Thermocouples & Thermowells In Stock

Gulf Union Ozone supplies a comprehensive range of industrial temperature measurement instruments and thermowell assemblies for oil & gas, petrochemical, refinery, power generation, water treatment, and chemical plants across Saudi Arabia. Our portfolio covers PT100 RTDs (Class A and B to IEC 60751), mineral insulated thermocouples in Types K, J, T, E, N, R, S, and B, bar stock and fabricated thermowells to ASME PTC 19.3 TW with wake frequency calculation documentation, lagging-extension thermowell assemblies for insulated piping, bimetal dial thermometers (DIN 43763), and two-wire and four-wire temperature transmitters (HART / PROFIBUS PA / FF H1). Construction materials: SS 316/316L, Inconel 600/625, and Hastelloy C276 thermowells with mineral insulation (MI) cable. ATEX Zone 1/Zone 2 certified instruments available. ISO 9001:2015 certified (CR 4030570569). Same-day dispatch from our Jeddah warehouse.

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Temperature sensors and thermowells — PT100 RTDs, thermocouples, bar stock Inconel thermowells and temperature transmitters stocked in Jeddah Saudi Arabia — Gulf Union Ozone
StandardsIEC 60751 · ANSI/ISA-12 · ASME PTC 19.3 TW · DIN 43763
MaterialsSS 316/316L · Inconel 600/625 · Hastelloy C276 · Mineral Insulation
Range-200°C to +1700°C / ¼" to 2" Process Connection / ASME Class 150–2500
DispatchSame-day from Jeddah
QualityISO 9001:2015
Temperature Sensor & Thermowell Categories

Product Types in Stock

Gulf Union Ozone carries six temperature measurement and thermowell product families to internationally recognised IEC, ASME, DIN, and ANSI/ISA standards, with full calibration documentation and material traceability for Saudi Arabia process and safety-critical applications.

Type 01

PT100 RTDs — Mineral Insulated (IEC 60751)

Resistance temperature detectors (RTDs) using platinum element with resistance 100 Ω at 0°C to IEC 60751 — the standard precision temperature sensor for process control in Saudi Arabia oil & gas, petrochemical, and pharmaceutical plants. Class A accuracy (±(0.15 + 0.002|T|)°C) and Class B accuracy (±(0.30 + 0.005|T|)°C) versions available. Two-wire, three-wire, and four-wire connection configurations for elimination of lead resistance errors. Mineral insulated (MI) cable construction: platinum element in MgO powder insulation, SS 316L or Inconel 600 outer sheath, 3mm to 8mm OD. Measurement range -200°C to +850°C. Simplex (single element) and duplex (dual element for redundancy or comparison) assemblies. Connection head in aluminium alloy (IP65/IP67), stainless steel, or Ex d (ATEX Zone 1/2 flameproof) for hazardous area installations. Calibration certificate traceable to NIST/PTB supplied with every unit. HART-capable temperature transmitter head-mount option available (DIN B style head). Compliant with Saudi Aramco instrument standard SAES-J-002 for RTD selection.

Type 02

Thermocouples — Base Metal (Types K, J, T, E, N)

Mineral insulated base metal thermocouples for industrial temperature measurement in Saudi Arabia process plants. Type K (NiCr/NiAl, -200°C to +1200°C) — the most common thermocouple in oil & gas for process vessels, heat exchangers, and pipelines; Type J (Fe/Cu-Ni, -40°C to +750°C) for general industrial use and heat treatment furnaces; Type T (Cu/Cu-Ni, -200°C to +350°C) for cryogenic and food/pharmaceutical refrigeration applications; Type E (NiCr/Cu-Ni, -200°C to +900°C) for highest EMF output per degree, suitable for low-temperature differential measurement; Type N (NiCrSi/NiSi, 0°C to +1300°C) for high-stability applications in fired heater tubes where Type K suffers drift. Mineral insulated (MI) cable: MgO insulation, 1mm to 12mm OD, SS 316L / Inconel 600 sheath. Class 1 and Class 2 tolerance to IEC 60584-2. Simplex and duplex configurations. Connection head options: aluminium alloy DIN B head, stainless steel, Ex d ATEX (IIB or IIC) Zone 1/2. Calibration certificate traceable to NIST/PTB included.

Type 03

Thermocouples — Noble Metal (Types R, S, B)

Mineral insulated noble metal thermocouples for very high-temperature applications in Saudi Arabia refineries, fired heaters, steam reformers, and cement and glass plants. Type R (Pt-13%Rh/Pt, 0°C to +1600°C) for precise temperature measurement on fired heater radiant sections, steam superheaters, and catalytic reformer reactors; Type S (Pt-10%Rh/Pt, 0°C to +1600°C) as an ITS-90 calibration reference and high-temperature furnace measurement standard; Type B (Pt-30%Rh/Pt-6%Rh, +200°C to +1700°C) for highest temperature applications — glass furnace crowns, ceramic kilns, and ultra-high-temperature reactors where Types R and S approach their limits. Platinum/rhodium thermoelements in ceramic (Al₂O₃/mullite) or impervious mineral insulation tubes; SS 316L or Inconel 600 metallic protection tube; ceramic protection tubes (Pythagoras C530, Al₂O₃) for oxidising atmospheres above 1000°C. Class 1 and Class 2 tolerance to IEC 60584-2. Calibration certificate included; optional UKAS/PTB accredited calibration on request.

Type 04

Thermowells — Bar Stock, Fabricated & Lagging-Extension

Thermowells for protecting temperature sensors from process fluid pressure, flow velocity, and corrosion in Saudi Arabia process pipelines and vessels. Bar stock thermowells (machined solid from bar) in SS 316/316L, Inconel 600/625, Hastelloy C276, and duplex SS — providing superior strength compared to fabricated thermowells, mandatory per Saudi Aramco standard for velocities above 1 m/s. Straight-bore, tapered, and stepped-bore thermowell profiles engineered to ASME PTC 19.3 TW-2016 wake frequency calculation — DF ratio less than 0.8 verified, calculation document supplied. Process connections: threaded (½" NPT, ¾" NPT, 1" NPT), socket-weld, and flanged to ASME B16.34 Class 150 to Class 2500. Lagging-extension thermowells (extended neck to compensate for pipe insulation thickness 50mm to 300mm) in all materials. Fabricated thermowells for larger process connections and vessel nozzles. Van Stone (lap-joint) thermowell flange option for easy rotation without process isolation. ASME PTC 19.3 TW calculation documentation included with every thermowell quotation for engineered applications. EN 10204 3.1 MTC for all materials.

Type 05

Bimetal Thermometers (DIN 43763)

Bimetal dial thermometers for local temperature indication on process vessels, pipelines, heat exchangers, pump casings, and utility equipment in Saudi Arabia — no electrical power required. Bimetal coil element drives a pointer directly, giving a robust mechanical temperature indication. Standard range -40°C to +550°C; case diameter 100mm and 160mm (standard) and 50mm (compact); accuracy Class 1 or Class 2 to EN 13190. Back connection and lower (bottom) connection versions for different installation orientations. Adjustable angle (0°–270°) and fixed-angle stem orientations. SS 316L stem (protection tube) as standard; Hastelloy C276 stem for corrosive applications; Monel 400 for hydrofluoric acid service. Glycerine-filled case for vibrating equipment (pump discharge temperature gauges, compressor discharge). Process connection: ½" NPT or ¼" NPT male thread; flanged versions to ASME B16.34 Class 150 for closed process connection. Dual-scale (°C/°F) available. Window: safety glass or laminated safety glass. Ex-proof version (ATEX Ex d) available for Zone 1 hazardous area. EN 10204 2.2 inspection note included; 3.1 MTC on request.

Type 06

Temperature Transmitters (HART / PROFIBUS / FF H1)

Two-wire 4-20 mA temperature transmitters with HART 7, PROFIBUS PA, or FOUNDATION Fieldbus H1 digital communication for integration with Saudi Arabia plant DCS and SCADA systems. Head-mount transmitters (DIN B style) for installation inside RTD or thermocouple connection head — inputs: Pt100 RTD (2/3/4-wire), any thermocouple type (K/J/T/E/N/R/S/B), mV direct input, and resistance input. DIN rail-mount transmitters for marshalling cabinet or junction box installation. Accuracy ±0.1°C or 0.05% of span. Self-diagnostics with NAMUR NE 43 / NE 107 fault state signalling (3.6 mA or 22 mA upscale/downscale). SIL 2 certified (TÜV) transmitters for safety-instrumented systems (SIS) to IEC 61511 on trip duty. ATEX II 2G Ex ia IIB T6 Gb and Ex d IIB T6 Gb variants for Zone 1 hazardous area installations. LCD display (optional) with backlight and local temperature readout. Sensor drift and sensor-to-sensor comparison (duplex) monitoring. Conformal coating for marine and coastal Saudi Arabia environments. Configuration via HART handheld communicator or EDDL/FDT/DTM software. Full commissioning documentation with calibration certificate.

In Summary

Gulf Union Ozone stocks four principal temperature sensing technologies for Saudi Arabia oil and gas and petrochemical service. Thermocouple assemblies in Types K, J, and E deliver fast response for gas service; RTD assemblies in Pt100 and Pt1000 provide high accuracy for process control. Bimetallic thermometers give local indication without electrical power; infrared sensors serve rotating equipment and high-radiation zones. Thermowell types cover bar stock (solid-drilled, highest strength), fabricated (welded, lower cost), and Van Stone (flanged, removable without shutdown). Process connections conform to ASME B16.5 flanges Class 150 through 1500 or NPT threaded; head connections meet IEC 60534. Temperature sensors are not SAEP-347 Annex 4 items; however, thermowell specifications are governed by SAES-J-601 and must be verified to ASME PTC 19.3 TW to prevent vortex-induced resonance failure. Materials range from 316/316L stainless for standard service to Inconel 600 for above 540°C and Hastelloy C-276 for chloride streams. NIST-traceable calibration certificates and IECEx/ATEX Zone 1 and Zone 2 ratings available from Jeddah stock.

Product Catalog

Complete Temperature Sensors & Thermowells Range — 28+ Products

All temperature instruments supplied with calibration certificate (NIST/PTB traceable) and EN 10204 3.1 MTC for metallic parts. ASME PTC 19.3 TW wake frequency calculation documentation included for engineered thermowells. ISO 9001:2015 QMS (CR 4030570569).

Product Standard / Spec Material Size / Range Application
PT100 RTD — Simplex, Class A, 3-Wire, SS 316L Sheath IEC 60751 Class A / EN 60751 / NIST calibration SS 316L sheath; MgO insulation; Pt100 element; Al DIN B head Sheath Ø 6–8mm; insertion 50–500mm; -200°C to +600°C Process control — vessels, heat exchangers, pipelines, utility
PT100 RTD — Duplex, Class A/B, 4-Wire, SS 316L IEC 60751 Class A + Class B / NIST calibration SS 316L sheath; dual Pt100 elements (4-wire + 3-wire); IP67 head Sheath Ø 8–10mm; insertion 50–500mm; redundant signal Critical process loops — primary/backup control or SIS voting
PT100 RTD — ATEX Ex d IIB T6, Zone 1 IEC 60751 Class A / ATEX II 2G Ex d IIB T6 Gb / IECEx SS 316L sheath; Ex d flameproof CI connection head; IP66 Sheath Ø 6–8mm; Zone 1 IIB Group installation Zone 1 process temperature — Aramco, SABIC hazardous area duty
PT100 RTD — Inconel 600 Sheath (High-Temperature) IEC 60751 Class B / EN 10204 3.1 MTC — UNS N06600 Inconel 600 sheath; MgO insulation; Pt100 element Sheath Ø 6–10mm; to +850°C; high-temp process Reformer outlet, steam lines, fired heater outlet piping
Thermocouple — Type K, MI SS 316L, Simplex (Standard) IEC 60584-1 Class 2 / EN 60584 / NIST calibration SS 316L sheath; MgO insulation; NiCr/NiAl wires; Al DIN B head Sheath Ø 3–8mm; -200°C to +1200°C; simplex General process temperature — vessels, pipelines, exchangers
Thermocouple — Type K, MI Inconel 600, Duplex, ATEX Zone 1 IEC 60584 Class 1 / ATEX II 2G Ex d IIB T6 Gb / IECEx Inconel 600 sheath; dual NiCr/NiAl elements; Ex d head; IP66 Sheath Ø 6–10mm; Zone 1; -50°C to +1100°C High-temp Zone 1 — fired heater passes, reformer, Zone 1 furnace
Thermocouple — Type J, MI SS 316L (Industrial Furnace) IEC 60584-1 Class 2 / EN 60584 SS 316L sheath; MgO insulation; Fe/Cu-Ni wires; Al head Sheath Ø 3–8mm; -40°C to +750°C Heat treatment furnaces, stress-relief ovens, industrial kilns
Thermocouple — Type T, MI SS 316L (Cryogenic / Low-Temp) IEC 60584-1 Class 1 / EN 60584 / NIST calibration SS 316L sheath; Cu/Cu-Ni wires; MgO insulation; Al head Sheath Ø 3–6mm; -200°C to +350°C Cryogenic LNG, refrigeration, cold storage, pharmaceutical cold chain
Thermocouple — Type N, MI Inconel 600 (High-Stability) IEC 60584-1 Class 1 / EN 60584 / NIST calibration Inconel 600 sheath; NiCrSi/NiSi wires; duplex option Sheath Ø 4–10mm; 0°C to +1300°C; low drift Fired heater tube skin, reformer tube outlet — superior drift resistance to Type K
Thermocouple — Type R, Pt-13%Rh/Pt (High-Temperature) IEC 60584-1 Class 1 / ITS-90 / NIST calibration Al₂O₃ twin-bore protection tube; Pt-13%Rh/Pt wires OD 4–10mm tube; 0°C to +1600°C Fired heater radiant sections, steam superheaters, catalytic reformers
Thermocouple — Type S, Pt-10%Rh/Pt (Reference Grade) IEC 60584-1 Class 1 / ITS-90 reference standard Al₂O₃ or mullite protection tube; Pt-10%Rh/Pt wires; ITS-90 0°C to +1600°C; ultra-stable calibration reference grade High-precision furnace reference, glass and ceramics industry, calibration labs
Thermocouple — Type B, Pt-30%Rh/Pt-6%Rh (Ultra-High-Temp) IEC 60584-1 Class 2 / NIST calibration Al₂O₃ protection tube; Pt-30%Rh and Pt-6%Rh wires +200°C to +1700°C; highest-range noble metal TC Glass furnace crowns, ceramic kilns, platinum smelting, ultra-high-temp reactors
Bar Stock Thermowell — SS 316/316L, Tapered, ½" NPT ASME PTC 19.3 TW-2016 / EN 10204 3.1 MTC SS 316L bar stock; tapered OD profile; ½" NPT male thread Insertion 50–500mm; bore 6.35–11mm; up to Class 1500 Standard process pipelines — gas, liquid, steam — PTC 19.3 verified
Bar Stock Thermowell — SS 316L, Flanged (ASME B16.34 Class 150) ASME PTC 19.3 TW / ASME B16.34 Class 150 / EN 10204 3.1 MTC SS 316L bar stock; tapered; raised-face ASME B16.34 flange Insertion 75–600mm; ¾" to 2" NPS flanged; Class 150–1500 High-pressure process lines and vessel nozzle mounting
Bar Stock Thermowell — Inconel 600, Tapered, ¾" NPT ASME PTC 19.3 TW / EN 10204 3.1 MTC — UNS N06600 Inconel 600 bar stock; tapered; ¾" NPT thread; heat-number traceability Insertion 100–600mm; bore 6.35–11mm; to +1100°C Fired heater passes, steam reformers, high-temp process lines
Bar Stock Thermowell — Inconel 625, Flanged (Offshore / Chloride) ASME PTC 19.3 TW / ASME B16.34 / EN 10204 3.1 MTC — UNS N06625 Inconel 625 bar stock; tapered; ASME B16.34 flange Insertion 100–600mm; flanged; superior pitting resistance Offshore, coastal KSA — chloride SCC resistance; seawater service
Bar Stock Thermowell — Hastelloy C276, Flanged (Severe Corrosion) ASME PTC 19.3 TW / ASME B16.34 / EN 10204 3.1 MTC — UNS N10276 Hastelloy C276 bar stock; tapered; ASME B16.34 flanged Insertion 100–500mm; to 350°C; HCl / H2SO4 / HF service Concentrated acid, wet chlorine, HF alkylation — severe corrosion duty
Lagging-Extension Thermowell — SS 316L (Insulated Piping) ASME PTC 19.3 TW / ASME B16.34 / EN 10204 3.1 MTC SS 316L; standard bore thermowell + extended lagging neck Lagging extension 50–300mm; insertion 100–600mm Insulated process lines — thermowell reaches through pipe insulation
Lagging-Extension Thermowell — Inconel 600, Flanged ASME PTC 19.3 TW / ASME B16.34 / EN 10204 3.1 MTC Inconel 600; lagging-extension neck; ASME flanged; tapered bore Lagging 50–300mm; high-temp insulated process line; to +1000°C High-temp insulated steam and process lines — reformers, fired heaters
Bimetal Thermometer — SS 316L Stem, 100mm Case (Lower Connection) EN 13190 Class 1 / DIN 43763 / ASME B40.3 SS 316L stem; SS 304 case; glycerine-filled; safety glass Case Ø 100mm; stem 100–400mm; ½" NPT; range -40°C to +400°C Local temperature indication — pipelines, pump casings, tanks
Bimetal Thermometer — Adjustable Angle, 160mm Case EN 13190 Class 1 / DIN 43763 SS 316L stem; SS 304 case; glycerine-filled; adjustable angle 0–270° Case Ø 160mm; stem 100–500mm; ½" NPT; -40°C to +550°C Process vessels, heat exchangers, compressor piping — easy reading angle
Bimetal Thermometer — ATEX Ex d, Zone 1 (100mm Case) EN 13190 / ATEX II 2G Ex d IIB T6 Gb / IECEx SS 316L stem; Ex d CI case; safety glass; glycerine-filled Case Ø 100mm; Zone 1; ½" NPT; -40°C to +400°C Zone 1 local temperature indication — oil & gas process and storage
Head-Mount Temperature Transmitter — HART 7, 4-20 mA (DIN B) HART 7 / IEC 61508 SIL 2 / CE / IP66 / NAMUR NE 43 Aluminium housing IP66; RTD/TC/mV universal input; two-wire 4-20 mA DIN B head-mount; accuracy ±0.1°C; Pt100, K, J, T, E, N, R, S, B DCS temperature loop — universal RTD/TC input, HART digital signal
Head-Mount Temperature Transmitter — ATEX Ex ia, Zone 1 (HART) ATEX II 2G Ex ia IIB T6 Gb / IECEx / HART 7 / SIL 2 Ex ia SS or CI head; intrinsically safe; Zener barrier required DIN B head-mount; Zone 1 IIB; RTD/TC universal input Zone 1 DCS temperature measurement — Aramco / SABIC hazardous area
Head-Mount Temperature Transmitter — PROFIBUS PA / FF H1 PROFIBUS PA / FF H1 / ATEX Ex ia IIB T6 / SIL 2 TÜV DIN B head; GSD/DD files supplied; bus-powered; IP66 housing DIN B head-mount; RTD/TC universal input; PROFIBUS or FF bus Fieldbus DCS integration — Saudi Aramco FOUNDATION Fieldbus standard
DIN Rail Temperature Transmitter — HART, 4-20 mA (Cabinet) HART 7 / IEC 61508 SIL 2 / CE / EN 60068 (vibration) DIN 35mm rail mount; polycarbonate housing; snap-fit; IP20 35mm DIN rail; 2-wire; 4-20 mA HART; 24 VDC supply Marshalling cabinet or junction box temperature conversion
Thermocouple Extension Cable — Type K, SS Braid (MI Equivalent) IEC 60584-3 / IEC 60332-1 — halogen-free NiCr/NiAl extension alloy conductors; SS braid; PTFE insulation 2-core and 4-core; OD 4–8mm; to 200°C cable temperature Type K thermocouple extension from head to junction box / transmitter
Mineral Insulated (MI) Thermocouple Cable — Type K / J / N (Bare) IEC 60584-1 / IEC 61515 — MI cable standard SS 316L or Inconel 600 sheath; MgO insulation; IEC-grade thermowire Sheath Ø 1.5–8mm; per metre or coil; grounded/ungrounded tip Custom sensor fabrication, skin temperature on vessels and exchanger shells
Why Us

Why Industrial Buyers in Saudi Arabia Choose Gulf Union Ozone for Temperature Sensors

⚡

Local Stock — Same-Day Dispatch

PT100 RTDs, Type K thermocouples, SS 316L thermowells, bimetal thermometers, and temperature transmitters stocked in Jeddah for same-day dispatch — keeping critical temperature loops live at Saudi Arabia process plants.

📄

ASME PTC 19.3 & ATEX Documentation

Wake frequency calculation (DF ratio) reports per ASME PTC 19.3 TW, ATEX DoC and IECEx certificates, EN 10204 3.1 MTCs, and NIST-traceable calibration certificates — complete for Saudi Aramco and EPC project requirements.

🎍

ISO 9001:2015 Certified Quality

Gulf Union Ozone is ISO 9001:2015 certified (CR 4030570569), Jeddah, Saudi Arabia — all temperature sensors and thermowells are inspected and documented under our certified quality management system.

🗺

Nationwide KSA Delivery

Temperature instruments delivered to all 18 Saudi regions — Jubail, Yanbu, Ras Tanura, Dammam, Riyadh, Jizan, and Tabuk. Urgent RTD and thermocouple replacements dispatched same-day from our Jeddah warehouse.

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Process filter housings, strainer baskets, and Y-strainers in SS 316L for process line protection and fluid conditioning in Saudi Arabia plants.
MRO

MRO Supplies

Instrument fittings, compression fittings, PTFE tape, thermocouple plugs and sockets, and general MRO consumables for instrumentation in Saudi Arabia.
Hardware

Fasteners

Stud bolts, hex bolts, nuts, and washers in ASTM A193 B7 and A194 2H for thermowell flange bolting and instrument connections in Saudi Arabia.
Frequently Asked Questions

Temperature Sensors & Thermowells in Saudi Arabia — Common Questions

What RTD and thermocouple types do you supply for oil & gas and petrochemical plants in Saudi Arabia?

Gulf Union Ozone supplies a complete range of temperature sensing instruments for Saudi Arabia oil & gas, petrochemical, refinery, power, and utility plants. Our range includes PT100 RTDs (Pt100 Ω at 0°C, Class A and Class B to IEC 60751) for precise temperature measurement from -200°C to +850°C; base metal thermocouples in Types K (NiCr/NiAl), J (Fe/Cu-Ni), T (Cu/Cu-Ni), E (NiCr/Cu-Ni), and N (NiCrSi/NiSi); and noble metal thermocouples in Types R (Pt-13%Rh/Pt), S (Pt-10%Rh/Pt), and B (Pt-30%Rh/Pt-6%Rh) for high-temperature furnace and fired heater applications. All sensors are available in SS 316/316L mineral insulated (MI) cable sheaths, Inconel 600 for high-temperature service, and Hastelloy C276 for corrosive or chloride-rich environments. Duplex (dual-element) RTD and thermocouple assemblies for redundancy are also available. All instruments are supplied with calibration certificates traceable to NIST/PTB.

Do your thermowells comply with ASME PTC 19.3 TW wake frequency calculations for Saudi Arabia process lines?

Yes. Gulf Union Ozone supplies thermowells designed and verified to ASME PTC 19.3 TW-2016 wake frequency calculation methodology — mandatory for thermowell installations on high-velocity process lines in Saudi Arabia oil & gas, refinery, and petrochemical plants. Wake frequency (Strouhal frequency) calculations consider process fluid velocity, density, viscosity, pipe diameter, thermowell geometry (tapered, straight, or stepped bore), insertion length, and natural frequency to verify structural integrity and avoid vortex-induced resonance failure. Calculation documentation (DF ratio report) is supplied with every engineered thermowell. Tapered and stepped-bore thermowell profiles are recommended for high-velocity and steam service where straight-bore thermowells would fail the PTC 19.3 check. Contact Gulf Union Ozone with pipe size, fluid data, velocity, and thermowell insertion length for a PTC 19.3 compliant thermowell selection.

Can you supply Inconel 600 and Hastelloy C276 thermowells for high-temperature and corrosive service in Saudi Arabia refineries?

Yes. Gulf Union Ozone supplies thermowells machined from solid bar stock in Inconel 600 (UNS N06600), Inconel 625 (UNS N06625), and Hastelloy C276 (UNS N10276) for high-temperature, corrosive, and aggressive process service in Saudi Arabia refineries and petrochemical plants. Inconel 600 thermowells are selected for furnace tubes, fired heater passes, and high-temperature reformer service (600°C to 1100°C). Inconel 625 provides superior chloride stress corrosion cracking resistance for offshore and coastal Saudi Arabia applications. Hastelloy C276 thermowells are specified for concentrated acids (HCl, H2SO4, HF), chlorinated hydrocarbons, and wet chlorine service where SS 316L would pit or stress corrode. All alloy thermowells are supplied with EN 10204 3.1 MTCs confirming UNS alloy composition, heat treatment, and mechanical properties. Lagging-extension versions (for insulated piping) are available in all alloys. Contact us with your process data sheet for material selection and ASME PTC 19.3 TW wake frequency verification.

In Summary

Thermowell design for Saudi Aramco process plants must satisfy ASME PTC 19.3 TW-2016 (thermowell mechanical and vibration analysis standard) for all process fluid applications above 1 m/s velocity. Gulf Union Ozone supplies thermowells with ASME PTC 19.3 TW wake frequency calculation documentation — confirming that the thermowell natural frequency exceeds the vortex-shedding frequency at maximum process velocity. Stepped-shank, straight-shank, and tapered-shank thermowell bore profiles are available; threaded, socket-weld, and flanged process connections in 316L stainless steel and duplex 2205 for sour-service applications. Lagging extensions of 100 mm, 150 mm, and 200 mm for insulated pipelines. Thermowell material certification per EN 10204 3.1 for bar stock (316L, duplex 2205) and flange forgings (SA-182 F316L) for Saudi Aramco goods receipt.

Get a Quote

Request a Temperature Sensors & Thermowells Quotation

To get a fast quotation, provide: instrument type (RTD / thermocouple type / thermowell / bimetal thermometer / transmitter), process fluid and operating conditions (temperature, pressure, velocity for thermowell), insertion length, process connection (NPT size or ASME B16.34 class and flange size), material (SS 316L / Inconel 600 / Hastelloy C276), accuracy class, ATEX zone (safe area / Zone 1 / Zone 2), transmitter output (HART / FF H1 / PROFIBUS PA), and delivery location in Saudi Arabia.

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Recent Deliveries

  • • Thermocouple assemblies with SS 316L thermowells (ASME B16.5 Class 300) for a fired heater at a Ras Tanura refinery, 2025
  • • RTD assemblies for heat exchanger temperature monitoring at a petrochemical plant in Jubail, 2025
  • • Thermowells (Wake Frequency Calculation, ASME PTC 19.3 TW) for high-flow steam service at a Jeddah power station, 2025

CR 4030570569 | ISO 9001:2015 | Jeddah, Saudi Arabia  —  Saudi Aramco vendor compliance · SAEP-347 credentials

Technical content reviewed by Gulf Union Ozone’s Engineering Team, Jeddah — 2026

Inventory updated: August 2026

In Summary

Gulf Union Ozone temperature sensor and thermowell supply delivers across Saudi Arabia from the Jeddah instrument warehouse: standard Pt100 RTD assemblies, thermocouple assemblies (Type K, Type E, Type J), and 316L stainless steel thermowells in common immersion lengths are stocked for same-day collection in Jeddah, 48–72 hours to Jubail and Dammam, 72–96 hours to Riyadh. Emergency temperature sensor replacement during Saudi Aramco and SABIC plant shutdowns is supported with a next-day bonded-stock service from Jeddah. All temperature sensors and thermowells are supplied with: calibration certificate traceable to SASO national standards; material certificate per EN 10204 2.1 or 3.1; connection head approval (ATEX certificate for Ex d or Ex i versions); and dimensional inspection record. Transmitter heads, terminal blocks, and cable glands for complete temperature measurement point assembly are sourced alongside sensors and thermowells.

In Summary

Mineral-insulated (MI) thermocouples for high-temperature applications in Saudi Aramco fired heaters, reformers, and FCC reactors are supplied by Gulf Union Ozone with magnesium oxide (MgO) compacted insulation and Inconel 600 or 310SS sheaths rated to 1,200°C. Multi-point averaging thermocouples for reactor bed temperature profiling — with individual junction outputs or averaged millivolt signal — are sourced for Saudi Aramco catalytic reformer and hydrotreater units. Skin thermocouples for surface temperature measurement on Saudi Aramco pressure vessel walls and heat exchanger shells are supplied with weld-pad and spring-clip attachments for non-invasive installation. ATEX Zone 1 rated thermocouple head assemblies with Ex-d (flameproof) or Ex-e (increased safety) terminal boxes are standard for Saudi Aramco hazardous-area classified process areas. All temperature sensors are supplied with calibration certificates traceable to SASO national standards, IEC 60584 thermocouple tolerance class, and Pt100 IEC 60751 compliance certificates.