Level Gauges & Sight Glasses — Saudi Arabia

Level Gauges & Sight Glasses Supplier Saudi Arabia — Magnetic Indicators, Reflex Gauges & Displacer Transmitters In Stock

Gulf Union Ozone supplies a comprehensive range of liquid level measurement and visual inspection instruments for process vessels, storage tanks, and pipelines across Saudi Arabia oil & gas, petrochemical, refinery, water treatment, and chemical plant facilities. Our portfolio covers magnetic level indicators (MLI) for long-range remote-readable level measurement, reflex level gauges (ASME B16.34 Class 150 to Class 2500 rated), transparent bi-colour level gauges for steam and phase-boundary service, sight glass windows and sight flow indicators, float level switches for high/low alarm duty, and displacer-type level transmitters for continuous 4-20 mA HART level output. All instruments available in SS 316/316L bodies, NACE MR0175 compliant trim, borosilicate and boro-aluminosilicate glass, and PTFE gaskets. ISO 9001:2015 certified (CR 4030570569). Same-day dispatch from our Jeddah warehouse.

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Level gauges and sight glasses — magnetic level indicators, reflex gauges, transparent gauges and displacer transmitters stocked in Jeddah Saudi Arabia — Gulf Union Ozone
StandardsASME B16.34 · PED · NACE MR0175 · API 650/620
MaterialsSS 316/316L Bodies · Borosilicate Glass · PTFE Gaskets
RangeClass 150–Class 2500 / DN 15–DN 50 Process Connection / Range up to 6m
DispatchSame-day from Jeddah
QualityISO 9001:2015
Level Gauge & Sight Glass Categories

Product Types in Stock

Gulf Union Ozone carries six level measurement and visual inspection product families to internationally recognised ASME, NACE, API, and PED standards, with full documentation for Saudi Arabia process, storage, and utility applications.

Type 01

Magnetic Level Indicators (MLI)

Magnetic level indicators — the preferred level gauge for large vessels, storage tanks, and hazardous fluids in Saudi Arabia oil & gas and petrochemical plants — provide continuous visual level reading without a glass window in the process wetted path. A magnetic float inside a SS 316L side-tube follows the liquid level, flipping bi-colour indicator flags (red/white or yellow/black) on the external indicator column. Process body in SS 316/316L (standard), duplex SS, or Alloy 20 for corrosive service; NACE MR0175 trim available. Level ranges from 300mm to 6,000mm in a single unit; external reed switch transmitters (4-20 mA) for remote DCS level input; magnetic alarm switches for high/low level shutdown. Process connection to ASME B16.5 Class 150 to Class 1500 flanged or NPT screwed. Design pressure to 250 bar; design temperature -196°C to +400°C. ATEX II 1G (Zone 0 float zone) certification available for volatile hydrocarbon service.

Type 02

Reflex Level Gauges

Reflex level gauges for direct visual liquid level reading on process vessels and pressure equipment in Saudi Arabia — the standard type for clean, colourless, single-phase liquids where the refraction contrast between liquid and vapour phases gives a clear dark/bright indication. SS 316L or CS body; borosilicate glass reflex glass to DIN 7081; toughened mica shields for corrosive or crystallising liquids. Process connection to ASME B16.34 flanged body (Class 150, Class 300, Class 600, Class 900, and Class 1500) or screwed NPT ½" to ¾". Single-section gauges from 180mm to 1,350mm visible length; multi-section gauges up to 3,000mm with offset connections. Upper and lower gauge valves in SS 316 (Class 800 or Class 1500 forged) with ball check valve for automatic shut-off on glass breakage. NACE MR0175 version with controlled hardness body and trim for sour H2S service in Saudi Arabia refineries and amine plants. PED 2014/68/EU compliant; 3.1 MTC for body material.

Type 03

Transparent (Bi-Colour) Level Gauges

Transparent level gauges (also called bi-colour gauges) for steam boiler drum level, phase-boundary level, and applications where both fluid and vapour must be visible simultaneously — mandatory on steam boilers and critical vessels in Saudi Arabia utility and power plants. Two glass panels (front and rear) with illuminator lamp — steam phase appears red, water phase appears green (bi-colour effect), giving an unambiguous level reading even at pressure. Borosilicate glass to DIN 7081 (standard) or boro-aluminosilicate glass for higher temperature duty up to 400°C. SS 316L body, PTFE gaskets, and ball check valve gauge valves as standard. ASME B16.34 Class 600 to Class 1500 flanged process connections. Double-block-and-bleed valve arrangement available for on-line maintenance. Mica protectors for acidic or high-alkali liquids. Illuminator options: 24 VDC, 110 VAC, 230 VAC, and ATEX-certified for Zone 1 installations. Used widely on HRSG boiler drums, steam drum level gauges, and crude heater pass inlet vessels in Saudi Aramco facilities.

Type 04

Sight Glasses & Sight Flow Indicators

Sight glass windows (bull's-eye and tubular types) and sight flow indicators for visual inspection of fluid flow and condition in process pipelines and vessels across Saudi Arabia. Bull's-eye sight glasses: borosilicate glass lens in SS 316L body, screwed or flanged connection from DN 15 to DN 200; rated to ASME B16.34 Class 150 to Class 1500. Tubular sight glasses: clear borosilicate or quartz glass tube in SS 316L end blocks for full-bore flow visibility; screwed DN 15 to DN 50; rated to 10 bar. Sight flow indicators with flow indicator device: paddle-type (flow/no-flow indication), ball-type (turbulent flow), and drip-type (for low flow lubrication and chemical injection lines). All with borosilicate glass windows; SS 316L and carbon steel body options; PTFE gaskets. Used in chemical injection lines, lube oil systems, cooling water circuits, and process sample points throughout Saudi Arabia oil & gas plants. WELD-END and socket-weld connections available for high-pressure service.

Type 05

Float Level Switches

Float level switches for high-level alarm, low-level alarm, pump start/stop, and ESD (emergency shutdown) duty on process vessels, sumps, separator drums, and storage tanks in Saudi Arabia. Side-mounted and top-mounted float switch configurations in SS 316L body with ASME B16.34 Class 150 or Class 300 flanged connection or NPT screwed connection. Magnetic reed switch actuation — SS 316L float buoy with internal permanent magnet; dry-contact SPDT or DPDT reed switch rated 5A 230 VAC. Multi-point float switch assemblies for simultaneous high-high, high, low, and low-low alarms on a single top-entry mounting flange. ATEX II 1G (for Zone 0 internal — classified area inside vessel) and ATEX II 2G (Zone 1 external) certification available for hydrocarbons and other flammable liquids in Saudi Arabia oil & gas and petrochemical storage. NACE MR0175 body and trim for sour service. SIL 2 capable (with proof-test interval documentation) for safety-instrumented system (SIS) duty on critical vessels.

Type 06

Displacer Level Transmitters

Displacer-type (buoyancy) level transmitters for continuous liquid level and liquid-liquid interface measurement with 4-20 mA HART output — widely used in Saudi Arabia process vessels, separator drums, and storage tanks where high accuracy and regulatory compliance (SIL 2) are required. A suspended displacer element (SS 316L or Hastelloy C276) experiences buoyancy force proportional to submersion depth, converting directly to a calibrated 4-20 mA level signal via a torsion tube and electronic transmitter. Ranges from 300mm to 3,600mm; process connection ASME B16.34 Class 150 to Class 1500 flanged (top or side entry). Dual-compartment housing: intrinsically safe (Ex ia) or flameproof (Ex d IIB T6) to ATEX / IECEx for Zone 1 installations. HART, PROFIBUS PA, and FOUNDATION Fieldbus (FF H1) communication options. LCD local indicator with backlight and HART communicator access port. SIL 2 certified (TÜV) for safety-instrumented system (SIS) applications on separator level control and ESD in Saudi Aramco-standard facilities. Calibration traceable to NIST/PTB with 3.1 MTC and calibration certificate supplied.

Product Catalog

Complete Level Gauges & Sight Glasses Range — 27+ Products

All level instruments supplied with calibration certificate, material test reports (EN 10204 3.1 MTC), and pressure test certificate. NACE MR0175 hardness test reports included where applicable. ISO 9001:2015 QMS (CR 4030570569).

Product Standard / Spec Material Size / Range Application
Magnetic Level Indicator (MLI) — SS 316L, Class 150 ASME B16.34 Class 150 / PED 2014/68/EU SS 316L body & float; borosilicate flag column; PTFE gaskets Range 300–6,000mm; process: flanged ¾" Class 150 Water, condensate, chemical, utility vessel level — general service
Magnetic Level Indicator (MLI) — SS 316L, Class 600 (Pressure Vessel) ASME B16.34 Class 600 / PED / EN 10204 3.1 MTC SS 316L body & float; bi-colour flag indicator; PTFE gaskets Range 300–4,500mm; up to 100 bar / 300°C High-pressure process vessels, separator drums, flash drums
Magnetic Level Indicator — NACE MR0175, Sour Service NACE MR0175 / ISO 15156 / ASME B16.34 Class 300–1500 SS 316L controlled hardness; duplex SS float option; PTFE gaskets Range 300–5,000mm; H2S-rated; HRC hardness report included Sour service — amine absorbers, sour water strippers, H2S vessels
MLI with Reed Switch Transmitter (4-20 mA Level Output) ASME B16.34 / ATEX II 2G Ex ia option / HART SS 316L MLI column; external reed switch transmitter array; IP67 Range 300–3,000mm; 4-20 mA HART output; ±5mm accuracy Remote DCS level reading — separator, KO drum, surge vessel
Reflex Level Gauge — SS 316L, Class 150 (Standard) ASME B16.34 Class 150 / PED 2014/68/EU / DIN 7081 glass SS 316L body; borosilicate reflex glass; ball-check gauge valves Visible length 180–1,350mm single section; Class 150 flanged Water, condensate, oils, chemicals — clean single-phase liquid
Reflex Level Gauge — SS 316L, Class 600 (Process Vessels) ASME B16.34 Class 600 / PED / EN 10204 3.1 MTC SS 316L body; borosilicate glass; forged SS Class 800 gauge valves Visible length 180–900mm; rated 100 bar / 200°C Medium-pressure process vessels — absorption columns, reboilers
Reflex Level Gauge — CS, Class 300 with Mica Shield ASME B16.34 Class 300 / PED / DIN 7081 glass Carbon steel body; borosilicate glass + mica shield; CS gauge valves Visible length 180–1,350mm; chemicals with HF / NaOH Caustic, acid, and crystallising liquids — mica protects glass face
Reflex Level Gauge — NACE MR0175, Class 900 Sour Service NACE MR0175 / ISO 15156 / ASME B16.34 Class 900 SS 316L controlled hardness body; PTFE gaskets; NACE gauge valves Visible length 180–900mm; up to 150 bar H2S service Sour service refinery and amine plant vessels — Saudi Aramco standard
Transparent (Bi-Colour) Level Gauge — SS 316L, Class 600 ASME B16.34 Class 600 / PED / DIN 7081 borosilicate glass SS 316L body; two borosilicate glass panels; LED illuminator Visible length 180–900mm; rated 100 bar / 300°C Steam boiler drum level, phase-boundary liquids, coloured fluids
Transparent Gauge — Boro-Aluminosilicate Glass (High-Temp) ASME B16.34 Class 600/900 / PED / DIN 7082 glass SS 316L body; boro-aluminosilicate (Pyrex-equivalent) glass; PTFE gasket Visible length 180–700mm; to 400°C continuous High-temperature steam boilers, heat transfer fluid, thermal oil systems
Bull's-Eye Sight Glass — SS 316L, DN 25 (Screwed) ASME B16.11 / DIN 11851 / BS EN 1825 option SS 316L body; borosilicate glass lens; Viton or PTFE gasket DN 15–DN 50; ½" to 2" NPT; MAWP 10–40 bar Pipeline flow inspection — chemical injection, lube oil, cooling water
Bull's-Eye Sight Glass — SS 316L, Flanged (Class 150–1500) ASME B16.34 Class 150–1500 / PED 2014/68/EU SS 316L or CS body; borosilicate glass; ASME RF or RTJ flange DN 25–DN 200; rated to Class 1500 / 250 bar High-pressure vessel inspection ports — separator drum, reactor, column
Tubular Sight Glass — Borosilicate Tube, Screwed (Low Pressure) CE / PED — borosilicate tube assembly Borosilicate glass tube; SS 316L or brass end blocks; PTFE seal Bore 10mm–50mm; length 100mm–600mm; up to 10 bar Low-pressure flow observation — water circuits, glycol loops, cooling
Sight Flow Indicator — Paddle Type, SS 316L (Flow/No-Flow) ASME B16.11 / CE — screwed or wafer-flanged SS 316L body; borosilicate glass; SS paddle indicator; PTFE seal DN 15–DN 100; ½" to 4"; MAWP 10–40 bar Flow/no-flow confirmation — coolant, lube oil, chemical dosing lines
Sight Flow Indicator — Ball Type, SS 316L (Turbulent Flow) ASME B16.11 / CE / PED SS 316L body; borosilicate glass; SS or PTFE spinning ball; Viton seal DN 15–DN 80; MAWP up to 16 bar Verification of turbulent / circulating flow in lube and utility systems
Float Level Switch — Side-Entry, SS 316L (SPDT Reed Switch) ASME B16.34 Class 150 / IEC 60947-5-2 / CE SS 316L body & float; Viton seal; SPDT dry contact reed switch Setpoint adjustable 100–1,500mm from process nozzle; Class 150 High/low level alarm and pump start/stop — sumps, tanks, vessels
Float Level Switch — Top-Entry, Multi-Point (4 Setpoints) ASME B16.5 Class 150 / IEC 60947 / CE SS 316L stem & float; 4× SPDT reed switches on guide rod 4 setpoints in one body; range 300–3,000mm; top-flanged HH / H / L / LL level alarm on separator drums and process vessels
Float Level Switch — ATEX II 1G Zone 0 (Internal Classification) ATEX II 1G Ex ia IIA T4 Ga / IECEx / ASME B16.34 SS 316L float & stem; intrinsically safe reed switch; Ex ia terminal Range 100–2,000mm; Zone 0 inside hydrocarbon storage vessels Zone 0 — inside oil & gas storage tanks, floating roof tanks, API 650
Float Level Switch — NACE MR0175, Sour Service NACE MR0175 / ISO 15156 / ASME B16.34 Class 300 SS 316L NACE-compliant body & float; PTFE seal; hardness report Range 200–2,000mm; H2S-rated Class 300 flanged Sour water knockout drums, amine system vessels, acid gas separators
Displacer Level Transmitter — SS 316L, HART 4-20 mA ASME B16.34 Class 150/300 / HART 7 / CE / IEC 61508 SIL 2 SS 316L displacer & torque tube; dual-compartment housing; IP66 Range 300–3,600mm; accuracy ±2mm; HART output Continuous level measurement — process vessels, separator drums, columns
Displacer Transmitter — ATEX Ex ia, Zone 1 (FF / PROFIBUS PA) ATEX II 2G Ex ia IIB T6 Gb / IECEx / HART / FF H1 SS 316L displacer; Ex ia housing; intrinsically safe barrier required Range 300–3,000mm; Zone 1; FF H1 or PROFIBUS PA Zone 1 process vessels — DCS fieldbus integration, Saudi Aramco DCS
Displacer Transmitter — Interface Measurement (Oil/Water) ASME B16.34 / ATEX option / HART / SIL 2 SS 316L or Hastelloy C276 displacer; PTFE coated option Interface span 300–3,000mm; density difference >100 kg/m³ Oil-water interface in three-phase separators and boot level in distillate drums
Reflex Gauge Glass — Replacement (DIN 7081 Borosilicate) DIN 7081 / BS EN 5167 — reflex glass replacement Borosilicate reflex glass; fire-polished edges; traceable batch Length 147–320mm; width 26–38mm (standard DIN widths) On-site glass replacement for reflex level gauges — all brands
Transparent Gauge Glass — Replacement (DIN 7081 Borosilicate) DIN 7081 / DIN 7082 — transparent glass replacement Borosilicate flat glass; ground and polished faces; batch traceability Width 20–50mm; length 150–500mm; standard DIN sizes stocked Replacement glass for transparent/bi-colour level gauges — all brands
Level Gauge Valve — Forged SS 316L, Class 800 (Ball Check) ASME B16.34 Class 800 / API 602 / BS 5352 Forged SS 316L body; ball check; ½" screwed connection; PTFE packing ½" connection; rated 138 bar; Class 800 forged Upper and lower gauge isolation valves with auto ball-check safety
Level Gauge Gasket Kit — PTFE (Replacement Set) OEM-matched — DIN 7081 glass section gasket sets PTFE flat gaskets; heat-resistant grade; matched to gauge section width Width 26–38mm; compatible with standard DIN reflex & transparent gauges Annual glass gasket replacement — all reflex and transparent level gauges
Why Us

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

⚡

Local Stock — Same-Day Dispatch

Reflex gauges, sight glasses, replacement gauge glass, PTFE gasket kits, and float level switches stocked in Jeddah for same-day dispatch — reducing instrument replacement lead time for Saudi Arabia process plants.

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NACE & ATEX Documentation Ready

EN 10204 3.1 MTCs, NACE MR0175 hardness reports, ATEX DoC and IECEx certificates, calibration certificates, and pressure test documentation — complete for Saudi Aramco, SABIC, and EPC project requirements.

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ISO 9001:2015 Certified Quality

Gulf Union Ozone is ISO 9001:2015 certified (CR 4030570569), Jeddah, Saudi Arabia — all level gauges and sight glass instruments are inspected and documented under our certified quality management system.

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Nationwide KSA Delivery

Level instruments delivered to all 18 Saudi regions — Jubail, Yanbu, Ras Tanura, Dammam, Riyadh, Jizan, and Tabuk. Urgent gauge glass replacement and float switch supply dispatched same-day from Jeddah.

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Temperature Sensors & Thermowells

PT100 RTDs, thermocouples (K/J/T/E/N/R/S/B), bar stock and fabricated thermowells in SS 316L and Inconel 600 for Saudi Arabia process plants.
Filtration

Industrial Filters

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

MRO Supplies

PTFE gaskets, gauge valves, bolting, instrument fittings, and general MRO consumables for instrumentation maintenance in Saudi Arabia process plants.
Hardware

Fasteners

Stud bolts, hex bolts, nuts, and washers in ASTM A193 B7 and A194 2H for pressure instrument and gauge valve bolting in Saudi Arabia.
Frequently Asked Questions

Level Gauges & Sight Glasses in Saudi Arabia — Common Questions

What level gauge types do you supply for oil & gas and petrochemical process plants in Saudi Arabia?

Gulf Union Ozone supplies a comprehensive range of level measurement instruments for Saudi Arabia oil & gas, petrochemical, refinery, and storage tank applications. Our range includes magnetic level indicators (MLI) for large-range vessel level with remote magnetic reed switch transmitters, reflex level gauges (borosilicate glass, ASME B16.34 Class 600/900/1500 flanged bodies) for direct visual reading on process vessels, transparent (bi-colour) level gauges for steam boiler and phase-boundary applications, sight glass windows and sight flow indicators for pipeline visual inspection, float level switches for high/low alarm duty, and displacer-type level transmitters for continuous 4-20 mA level measurement. All instruments are available in SS 316/316L bodies with NACE MR0175 trim for sour service in Saudi Aramco and SABIC facilities.

Are your level gauges NACE MR0175 compliant for sour service H2S applications in Saudi Arabia?

Yes. Gulf Union Ozone supplies level gauges and sight glasses with NACE MR0175 / ISO 15156 compliant trim for sour service (H2S-containing) applications in Saudi Arabia oil & gas facilities. NACE-compliant scope includes SS 316L body with hardness-controlled materials (Brinell hardness typically less than 22 HRC for body and closure), duplex SS UNS S31803 or Alloy 825 for high-chloride sour conditions, NACE-certified bolting and gaskets (PTFE-encapsulated spiral wound), and trim components. NACE material test reports (EN 10204 3.1 MTC with hardness test results) are included. Glass type is selected based on H2S concentration and fluid compatibility — borosilicate for standard service, boro-aluminosilicate (Pyrex equivalent) for higher-temperature applications. Contact Gulf Union Ozone with your process data sheet for a NACE-compliant level gauge specification.

Do you supply API 650 and API 620 compatible level gauges and float switches for storage tanks in Saudi Arabia?

Yes. Gulf Union Ozone supplies level measurement instruments designed for API 650 (atmospheric storage tanks) and API 620 (low-pressure storage tanks) applications across Saudi Arabia tank farms and terminal facilities. For API 650 tanks, we supply side-mounted float level switches (flanged tank shell connection to ASME B16.5 Class 150 or API 650 nozzle dimensions), magnetic level indicators with external indication columns for crude oil and product tank interface detection, and displacer transmitters for continuous inventory level measurement with 4-20 mA HART output. For API 620 low-pressure tanks, we supply pressure-rated reflex and transparent gauges to ASME B16.34 Class 150. Float switches are available in ATEX II 1G (Zone 0 internal tank) or ATEX II 2G (Zone 1) certification for hydrocarbon storage tanks. Contact us with tank nozzle schedule and process fluid data for product selection.

Get a Quote

Request a Level Gauges & Sight Glasses Quotation

To get a fast quotation, provide: instrument type (MLI / reflex gauge / transparent gauge / sight glass / float switch / displacer transmitter), process fluid and operating conditions (temperature, pressure, specific gravity), level range required, pressure rating (ASME class), material required (SS 316L / duplex SS / Hastelloy), NACE MR0175 requirement (yes/no), ATEX zone classification, and delivery location in Saudi Arabia.

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Recent Deliveries

  • • Magnetic level gauges (ASME Class 600, SS 316L) for crude oil storage tanks at a Jubail terminal, 2025
  • • Reflex sight glasses for LPG storage vessel level indication at a bottling facility in Jeddah, 2025
  • • Bi-colour level gauges for boiler drum level monitoring at a power station in Riyadh, 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 Trading Co. supplies Level Gauges & Sight Glasses to industrial customers across Saudi Arabia with delivery from our Jeddah warehouse — all products ship with original certificates and compliance documentation for Aramco, SABIC, and government projects.

In Summary

Level Gauges & Sight Glasses from Gulf Union Ozone serves Saudi Aramco operations, SABIC, SADARA, SEC utilities, NEOM mega-projects, and major industrial facilities across the Kingdom — our inventory covers the most common specifications and grades.

In Summary

Gulf Union Ozone stocks a comprehensive range of Level Gauges & Sight Glasses — contact us for immediate availability confirmation and a competitive quotation with full compliance documentation.

In Summary

For urgent Level Gauges & Sight Glasses procurement in Saudi Arabia, WhatsApp +966 55 098 8062 — our team confirms stock availability within the hour and provides competitive quotations for Aramco, SABIC, SEC, and government projects.