Instrumentation & Gauges — Saudi Arabia

Instrumentation & Gauges Supplier Saudi Arabia — Pressure, Temperature & Level Instruments In Stock

Gulf Union Ozone stocks a comprehensive range of process instrumentation and gauges for oil & gas, petrochemical, water treatment, and general industrial applications across Saudi Arabia. Our instrumentation range covers pressure gauges (dry and glycerine-filled Bourdon tube, ASME B40.100), diaphragm seals (SS 316 / Hastelloy), temperature instruments (bimetallic thermometers, thermocouple assemblies Type J/K/E, RTD Pt100 assemblies, thermowells), level gauges and switches (magnetic, sight glass, ultrasonic), pressure transmitters and switches (4-20mA HART, ATEX), flow meters (rotameter, oval gear, turbine, vortex), and instrument fittings and manifolds. Accuracy ±0.5% to ±0.1% FS. ISO 9001:2015 certified (CR 4030570569). Full calibration certificates and ATEX documentation. Same-day dispatch from our Jeddah warehouse.

Submit RFQ
Process instrumentation and gauges — pressure gauges, temperature instruments and flow meters stocked in Jeddah Saudi Arabia — Gulf Union Ozone
StandardsASME B40.100 · IEC 60529 · ATEX
TypesPressure · Temp · Level · Flow
Accuracy±0.5% to ±0.1% FS
DispatchSame-day from Jeddah
QualityISO 9001:2015
Instrumentation & Gauges Categories

Product Types in Stock

Gulf Union Ozone carries six core categories of process instrumentation and gauges covering pressure, temperature, level, flow, transmission, and instrument accessories for Saudi Arabia oil & gas, petrochemical, and process industry sites. All instruments supplied with calibration certificates and compliance documentation.

Type 01

Pressure Gauges & Diaphragm Seals

Bourdon tube pressure gauges in dry and glycerine-filled configurations to ASME B40.100 and EN 837-1. Case diameters 63mm, 100mm, and 160mm in SS 316 or brass. Glycerine-filled gauges for pulsating or vibrating service in pumps, compressors, and hydraulic systems. Differential pressure gauges for filter monitoring, level indication across vessels, and Pitot tube flow measurement. ATEX-certified gauges with non-sparking materials for Zone 1 and Zone 2 hazardous areas in Saudi Arabia refineries and gas plants. Diaphragm seals in SS 316, Hastelloy C-276, and PVDF diaphragm materials for viscous, corrosive, and slurry process media — available with flanged (DN25 to DN100), threaded (1/2" to 2" NPT/BSP), and sanitary connections. Fill fluids matched to process temperature from -20°C to +300°C.

Type 02

Temperature Instruments

Bimetallic thermometers with dial diameters 63mm, 100mm, and 160mm, stem lengths 100–500mm, adjustable angle connection, and ranges -40°C to +400°C — for pipeline, vessel, and duct temperature indication without power supply. Thermocouple assemblies in Type J (iron-constantan, -40°C to +750°C), Type K (chromel-alumel, -40°C to +1,260°C), and Type E for cryogenic-to-high-temperature service — supplied with terminal head, SS 316 sheath, and process connection. RTD assemblies with Pt100 sensing element (Class A, ±0.15°C at 0°C) for precision temperature measurement in process control loops. Thermowells in SS 316 and Hastelloy C-276 in lagged, tapered, and straight bore styles — standard insertion lengths 100mm to 315mm with 1/2" NPT and flanged process connections to ASME 150# through 1500#. All thermocouple and RTD assemblies available with transmitter heads for 4-20mA output.

Type 03

Level Gauges & Switches

Magnetic level gauges (MLG) with external float-and-magnet principle for visual level indication on tanks, separators, and pressure vessels at pressures up to 40 bar and temperatures to +250°C — no moving parts inside vessel, intrinsically safe for hazardous service. Borosilicate sight glasses (gauge glasses) in flat-glass and tubular styles with reflex and transparent illumination for direct visual level reading. Float switches for high-level, low-level, and pump-control duty — SS 316 float, SPDT or DPDT switching — in tank side-mount and top-mount configurations. Displacer-type level switches for interface and density measurement in separator and desalter vessels. Ultrasonic level transmitters (non-contact) for open tanks and sumps with 4-20mA HART output, measuring range up to 10m, IP67, suitable for corrosive vapour environments. Guided-wave radar (GWR) transmitters for interface level and high-accuracy tank gauging on oil-water separators.

Type 04

Pressure Transmitters & Switches

Smart pressure transmitters with 4-20mA HART protocol output, SS 316L wetted parts, measuring ranges -1 to +400 bar, accuracy ±0.1% span, and LCD local indicator — for integration into DCS, SCADA, and PLC systems in Saudi Arabia process plant. Differential pressure transmitters for flow measurement, filter monitoring, and level sensing across process vessels. ATEX-certified Ex ia IIC intrinsically safe transmitters for Zone 0, Zone 1, and Zone 2 hazardous locations in gas processing, refining, and chemical plant. Pneumatic pressure switches (electromechanical) with adjustable set point, SS 316 wetted parts, and SPDT output for pump protection, compressor staging, and relief valve monitoring. High-pressure transducers for hydraulic test bench and sub-sea applications up to 1,400 bar. Gauge pressure, absolute pressure, and differential pressure versions stocked.

Type 05

Flow Measurement

Variable area flowmeters (rotameters) in borosilicate glass tube and armoured metal tube versions for flow measurement of gases and liquids in process plant utility lines — flow ranges from 0.5 L/h to 15,000 L/h liquid. Oval gear positive displacement flow meters in SS 316 and cast iron for high-viscosity fluid measurement (oils, glycol, resins) with accuracy ±0.5%, pulse and 4-20mA outputs. Turbine flow meters for low-viscosity liquid and gas measurement with high accuracy ±0.25%, SS 316 body, and frequency output — suitable for custody transfer and batch dosing applications. Vortex flow meters for steam, gas, and liquid in one device, 4-20mA HART output, flange connection DN25 to DN100, suitable for steam metering in Saudi Arabia utility systems. Ultrasonic clamp-on flow meters for non-invasive flow measurement on existing pipework without process shutdown — ideal for KSA plant maintenance and commissioning checks.

Type 06

Instrument Fittings & Accessories

Impulse tubing in SS 316 seamless to ASTM A269 — 6mm, 8mm, 10mm, and 12mm OD in coil and straight lengths for connecting instruments to process tapping points. Instrument needle valves in SS 316 with 1/4" and 1/2" NPT connections and rated to 413 bar — for process isolation at instrument root valves. Two-valve manifolds (block-and-bleed) for pressure transmitter isolation and equalisation. Three-valve manifolds for differential pressure transmitter calibration, isolation, and equalising valve in a single compact body. Five-valve manifolds for DP transmitter with additional instrument drain and vent valves. Instrument ball valves in SS 316 (miniature and full-bore) for general instrument isolation duty. Gauge cocks (instrument isolation valves) in SS 316 for pressure gauge isolation. Compression fittings and tube fittings in SS 316 (Swagelok-compatible type) in 6mm, 8mm, 10mm, and 12mm sizes.

In Summary

Instrumentation gauges are critical measurement devices at Saudi Aramco, SABIC, and SWCC facilities — pressure gauges on process lines and utilities, temperature gauges on heat exchanger inlet/outlet nozzles, and differential pressure gauges across filter elements and orifice plates. Gulf Union Ozone supplies Bourdon-tube pressure gauges to EN 837-1 in 40 mm, 63 mm, 100 mm, and 160 mm dial sizes for process, utility, and hydraulic applications; bimetal thermometers to EN 13190 in 63 mm and 100 mm dials with adjustable angle connection for field-readable installation; and differential pressure gauges with diaphragm seals for viscous, corrosive, or solid-bearing process fluids. Gauge materials — 316L stainless steel wetted parts with phenolic, aluminium, or stainless steel case for outdoor coastal service around Jubail and Jeddah. ATEX Zone 1 certified gauge versions for hazardous area installation in oil and gas gathering stations.

Product Catalog

Complete Instrumentation & Gauges Range — 28+ Products

All instruments supplied with calibration certificates, material test reports, and compliance documentation. ISO 9001:2015 QMS (CR 4030570569). Contact us for specific ranges, connections, and project quantities.

Product Standard / Spec Material / Output Range / Size Application
Pressure Gauge — Glycerine-Filled (100mm) ASME B40.100 Grade A; EN 837-1 SS 316 Bourdon tube, SS case 0–6, 0–16, 0–25, 0–40, 0–100, 0–400 bar Pumps, compressors, hydraulic lines — vibration and pulsation service
Pressure Gauge — Dry (63mm, Brass) ASME B40.100; EN 837-1 Brass Bourdon tube, ABS case 0–1 to 0–600 bar, 1/4" NPT lower mount General utility pressure indication — air, water, non-corrosive media
Differential Pressure Gauge (100mm) EN 837-3, ASME B40.100 SS 316 wetted parts, dual-port 0–0.6 to 0–25 bar DP, 1/2" NPT Filter monitoring, heat exchanger differential, Pitot flow measurement
Diaphragm Seal — Flanged, SS 316L Diaphragm ASME B16.5; EN 14516 SS 316L diaphragm, SS 316 body DN25 to DN100, ANSI 150# to 600# Viscous, slurry, and H₂S-containing process media — NACE MR0175
Diaphragm Seal — Threaded, Hastelloy C-276 EN 14516 Hastelloy C-276 diaphragm 1/2" to 2" NPT/BSP Strong acid, chloride, and corrosive chemical service
Bimetallic Thermometer (100mm Dial) EN 13190; ASTM E1 compatible SS 316 stem, adjustable angle -40°C to +400°C; stem 100–500mm Pipeline and vessel temperature indication without power supply
Thermocouple Assembly — Type K (SS 316 Sheath) IEC 60584-1 Class 1; ASTM E230 Chromel-alumel, SS 316 sheath, terminal head -40°C to +1,260°C; 6mm or 8mm OD Furnaces, heat treatment, process vessels — high-temp KSA plant
Thermocouple Assembly — Type J IEC 60584-1 Class 1 Iron-constantan, SS 316 sheath -40°C to +750°C Plastics processing, heat exchangers, general process temperature
RTD Assembly — Pt100 (Class A) IEC 60751 Class A; DIN 43760 Pt100 4-wire, SS 316 sheath, terminal head -200°C to +600°C; ±0.15°C accuracy at 0°C High-accuracy process temperature in DCS control loops
Thermowell — SS 316 Straight Bore, Threaded ASME B16.5; PTC 19.3 TW-2016 SS 316 bar stock, 6mm bore U-length 100 / 150 / 200 / 250 / 315mm; 1/2" NPT Standard process vessel and pipeline thermocouple/RTD protection
Thermowell — Hastelloy C-276 Flanged PTC 19.3 TW-2016; ASME B16.5 Hastelloy C-276 machined DN25–DN80 flange; U-length to 500mm Corrosive and H₂S-containing process streams — refinery and petrochemical
Magnetic Level Gauge (MLG) ASME Section VIII; API 2000 compatible SS 316 chamber, magnetic float Pressure up to 40 bar; temp to +250°C Separators, pressure vessels, storage tanks — hazardous service
Sight Glass — Reflex Borosilicate (DN15–DN50) DIN 7080; ASME B16.11 Borosilicate glass, CS or SS body PN16 / PN40; DN15 to DN50 Liquid level visual indication on tanks and vessels
Float Switch — SS 316 Side-Mount IEC 60947-5-1; IP65 SS 316 float and stem, SPDT microswitch PN16; 1/2" NPT or flanged High/low level alarm and pump cut-in/cut-out on tanks
Ultrasonic Level Transmitter (Non-Contact) IEC 60529 IP67; CE marked PVDF transducer; 4-20mA HART output Range 0.25 to 10m; ±0.25% accuracy Open tanks, sumps, corrosive vapour environments — non-contact
Pressure Transmitter — Smart 4-20mA HART IEC 61508 SIL 2; NAMUR NE43 SS 316L wetted, LCD display; HART 7 -1 to +400 bar; ±0.1% span accuracy DCS and SCADA integration — oil, gas, and process plant in KSA
Pressure Transmitter — ATEX Ex ia IIC ATEX II 2G Ex ia IIC T4; IECEx SS 316L wetted; 4-20mA intrinsically safe Zone 1 / Zone 2; 0–400 bar Hazardous area gas processing, refinery, petrochemical plant
Differential Pressure Transmitter — HART IEC 61508 SIL 2; NAMUR NE43 SS 316L wetted; 4-20mA HART 7 0–1 mbar to 0–100 bar DP Flow measurement, filter DP, level on vessels with high-pressure legs
Pressure Switch — Electromechanical IEC 60947-5-1; IP65 SS 316 wetted; SPDT, 10A contact Adjustable 0.5 to 400 bar set point Pump protection, compressor staging, and relief valve monitoring
Variable Area Flowmeter (Rotameter) — Glass Tube ISO 4006; ISO 6817 Borosilicate glass tube, SS float 0.5–5 L/h to 100–1,000 L/h liquid Utility liquid and gas flow indication — non-corrosive media
Variable Area Flowmeter — Armoured Metal Tube ISO 4006; ASME B40.100 SS 316 body, magnetic follower; 4-20mA opt. PN40; up to 15,000 L/h liquid; up to +200°C High-pressure and high-temperature utility and process flow measurement
Oval Gear Flow Meter — SS 316 ISO 6817; CE marked SS 316 gears and body; pulse + 4-20mA ±0.5% accuracy; up to 300 cSt viscosity High-viscosity oil, glycol, and resin metering — batch and custody transfer
Vortex Flow Meter — DN25 to DN100 IEC 61508 SIL 2 option; NAMUR NE43 SS 316 body; 4-20mA HART output Gas, liquid, steam; ±0.75% accuracy Steam metering, gas flow in process plant, utility header measurement
Instrument Manifold — 3-Valve (DP Transmitter) IEC 61508; ASME B16.34 SS 316 body; 1/2" NPT; PN420 3-valve block, equalise, vent DP transmitter isolation, calibration, and equalising in process plant
Instrument Manifold — 5-Valve ASME B16.34; CE marked SS 316; 1/2" NPT; PN420 5-valve with drain and vent DP transmitter with additional drain/vent — refinery and gas plant service
Impulse Tubing — SS 316 Seamless ASTM A269; ISO 1127 SS 316 seamless; annealed 6mm / 8mm / 10mm / 12mm OD; coil or straight Instrument tapping lines connecting process to gauges and transmitters
SS 316 Compression Tube Fittings (Swagelok-type) ASTM A276 SS 316; ISO 8434-1 SS 316 body, ferrules, nut 6mm / 8mm / 10mm / 12mm; union, elbow, tee, reducer Instrument tubing connections — leak-free, re-assemblable
In Summary

Saudi Aramco instrumentation selection standards SAES-J-002 (instrument selection) and SAES-J-003 (instrument installation) govern gauge specification at Saudi Aramco-operated facilities. Under SAES-J-002, process pressure gauges on hydrocarbon service must have 316 stainless steel Bourdon tube, 100 mm minimum dial, and blow-out back protection per EN 837-1 safety requirements. Gulf Union Ozone supplies gauges cross-referenced to Saudi Aramco Material Master numbers for direct Aramco PR (Purchase Requisition) processing. All gauges supplied for Saudi Aramco Goods Receipt include the manufacturer's EN 10204 2.1 Declaration of Conformity and, on request, EN 10204 3.1 MTC for pressure-retaining components. Calibration certificates traceable to SASO-approved national standards are issued with every gauge delivery — mandatory for Saudi Aramco inspection on safety-critical instrument loops at SAEP-347 facilities. Gauge syphons, snubbers, and isolation ball valves to complete the instrument connection assembly are stocked alongside gauges.

Why Us

Why Industrial Buyers in Saudi Arabia Choose Gulf Union Ozone for Instrumentation & Gauges

⚡

Local Stock — Same-Day Dispatch

Full instrumentation range stocked in Jeddah — pressure gauges, thermocouples, RTDs, transmitters, and manifolds shipped same-day to any KSA site. No waiting on long-lead import instruments during a plant shutdown.

📄

Calibration & ATEX Documentation Ready

Every instrument ships with calibration certificates, material test reports, and where applicable ATEX EC-type examination certificates — documents required by Saudi Aramco and SABIC instrument inspection gates.

🎍

ISO 9001:2015 Certified Quality

Gulf Union Ozone is ISO 9001:2015 certified (CR 4030570569), Jeddah, Saudi Arabia — giving instrument engineers and procurement teams confidence in product traceability on every order.

🗺

Nationwide KSA Delivery

Delivery to all 18 Saudi regions — Jubail, Yanbu, Dammam, Riyadh, Jizan, Tabuk, Ras Tanura, and beyond. Project instrument packages and bulk spares orders fulfilled with consistent lot traceability.

In Summary

Digital pressure gauges with 4–20 mA output and HART protocol are increasingly specified at new NEOM, Red Sea Project, and SABIC capital projects replacing traditional Bourdon-tube gauges on PLC/DCS-interfaced measurement loops. Gulf Union Ozone supplies digital process gauges with stainless steel sensing diaphragm, ±0.1% accuracy, and LCD display for field indication plus analog output — meeting Saudi Aramco SAES-J-002 requirements for digital instrumentation. Diaphragm-sealed gauge assemblies for viscous, crystallising, or corrosive process fluids are assembled by Gulf Union Ozone with gauge, diaphragm seal, and capillary tube as a factory-assembled and factory-calibrated unit — critical for accuracy on high-viscosity polymer and slurry applications at SABIC Jubail and Al Jubail Industrial City. Gauge calibration and certification services for existing plant gauges during turnaround are offered through our Jeddah instrument workshop using deadweight testers and digital reference standards.

Related Products

Also Stocked at Gulf Union Ozone

Piping

Valves

Gate, globe, ball, butterfly, check, and needle valves in CS, SS 316, and Hastelloy for KSA oil, gas, and process plant piping systems.
Automation

Pneumatic Systems

Pneumatic cylinders, FRL units, solenoid valves, air preparation equipment, and tubing for industrial automation in Saudi Arabia.
Control

Control Valves & Actuators

Pneumatic and electric actuated control valves, positioners, and valve accessories for process control in KSA oil and gas facilities.
Measurement

Flow Meters & Level

Electromagnetic, Coriolis, turbine, and ultrasonic flow meters plus level transmitters for custody transfer and process measurement in KSA.
In Summary

Gulf Union Ozone instrumentation gauge supply delivers across Saudi Arabia from the Jeddah warehouse: standard pressure gauges, thermometers, and differential pressure gauges in common ranges are available same-day in Jeddah, 48–72 hours to Jubail and Dammam, 72 hours to Al Khobar and Yanbu, and 72–96 hours to Riyadh. Emergency gauge replacement during Saudi Aramco and SABIC shutdown periods is supported with bonded warehouse stock of the most common EN 837-1 gauge models in stainless steel for process service and glycerine-filled versions for pulsating or vibrating service. Instrument hook-up components — gauge isolation valves (1/2-inch NPT or SW), gauge cocks (equalising type for DP gauges), and capillary assemblies — are sourced alongside the gauges for a complete instrument station supply from a single Gulf Union Ozone purchase order. All gauges are delivered with calibration certificate and EN 10204 2.1 declaration of conformity.

Get a Quote

Request an Instrumentation & Gauges Quotation

To get a fast quotation, share: instrument type (pressure gauge / thermocouple / RTD / transmitter / flow meter), process conditions (fluid, pressure, temperature), connection type (NPT / flanged / compression), materials required (SS 316 / Hastelloy / ATEX), quantity per line item, and delivery location in Saudi Arabia. Project quantities welcome.

Email Inquiry Submit RFQ Form

CR 4030570569 | ISO 9001:2015 | Jeddah, Saudi Arabia

Inventory updated: August 2026