What is the difference between electromagnetic and ultrasonic flow meters for water metering in Saudi Arabia?

Electromagnetic flow meters (mag meters) and ultrasonic flow meters both measure liquid flow without moving parts, but they operate on different principles and suit different installation scenarios. Electromagnetic flow meters work only with electrically conductive liquids (minimum conductivity approximately 5 µS/cm) and require cutting the pipe for inline installation. They deliver excellent accuracy (typically ±0.2–0.5% of reading) and long-term stability, making them the preferred choice for water and wastewater custody transfer metering, chemical dosing, and slurry measurement in Saudi Arabia industrial plants. ATEX-rated versions cover hazardous area applications. Ultrasonic clamp-on flow meters attach externally to the existing pipe without pipe cutting or process interruption. They work on any liquid — including hydrocarbons, deionised water, and aggressive chemicals — provided the pipe wall is a single layer and the liquid is clean. Clamp-on units are ideal for retrofitting measurement on existing pipelines and for commissioning verification and temporary flow surveys. Insertion ultrasonic meters offer a middle ground with a single hot-tap entry point for large pipe diameters. Gulf Union Ozone stocks both technologies in Jeddah; contact us on WhatsApp 966550988062 with your pipe material, size, fluid type, and conductivity for the correct recommendation.

Can vortex flow meters be used for saturated steam measurement on Saudi Arabia process plants?

Yes. Vortex flow meters are the standard recommended technology for steam flow measurement — both saturated and superheated — at Saudi Arabia refineries, power stations, and process plants. The vortex meter generates a frequency signal proportional to volumetric flow by detecting vortices shed by a bluff body in the flow stream. For steam, the critical advantage is the absence of moving parts (unlike turbine meters) and the ability to handle condensate slugs better than differential pressure orifice plates during plant start-up. To convert from volumetric to mass flow for steam energy metering, integral multivariable vortex meters with built-in pressure and temperature compensation and an on-board steam flow computer are available — giving mass flow, energy flow (kJ/h), and totalized energy directly. Available in DN25 to DN300, rated to 40 bar and 400°C. ATEX/IECEx Zone 1 and Zone 2 versions stocked for hazardous area installation at Saudi Aramco, SABIC, and refinery utility systems. Gulf Union Ozone stocks multivariable vortex meters in Jeddah. Submit your line size, operating pressure, temperature, and required output for a quotation.

Which is better for crude oil storage tank level measurement in KSA — guided wave radar or ultrasonic?

For crude oil storage tanks in Saudi Arabia, guided wave radar (GWR) is generally preferred over free-space ultrasonic for several reasons. Guided wave radar sends a microwave pulse along a rigid or flexible probe submerged in the liquid — the signal travels the probe rather than through the vapour space. This makes GWR insensitive to vapour density, foam, temperature gradients, turbulence, and vapour-space obstructions, all of which are common in crude oil floating roof tanks and fixed-roof tanks with hydrocarbon vapour. GWR accuracy is typically ±3–5mm and it handles interface measurement (oil-water interface) as well as surface measurement in a single instrument. Free-space ultrasonic level transmitters emit an acoustic pulse through the vapour space and are more susceptible to vapour layer condensation, internal obstructions, and foam blanketing the surface — conditions typical of crude storage. Ultrasonic level transmitters are well-suited for water tanks, open channels, and pump sump applications in Saudi Arabia where these interference factors are not present. For API 2350 overfill prevention and custody transfer measurement at Saudi Aramco crude tank farms, servo-based or radar (FMCW) gauges are used, with GWR serving as independent high-level alarm. Gulf Union Ozone stocks GWR transmitters, ultrasonic level transmitters, and magnetic level gauges in Jeddah. Contact us with your tank dimensions, fluid, and safety requirements.

Flow Meters & Level Instruments Saudi Arabia

Flow Meter & Level Instrument Categories

Product Types in Stock

Gulf Union Ozone carries six core categories of flow and level instruments covering all major measurement technologies for Saudi Arabia oil, gas, water, and industrial process applications. All instruments are supplied with calibration certificates, material traceability documents, and technical datasheets.

Type 01

Electromagnetic Flow Meters (Mag Meters)

Electromagnetic flow meters measure flow of electrically conductive liquids using Faraday's law of induction. Available in sizes DN15 to DN2000, making them suitable for everything from chemical dosing lines to large water mains and effluent channels across Saudi Arabia. Accuracy ±0.2–0.5% of reading with long-term repeatability. Liner materials include PTFE (acid and alkali resistant), hard rubber and polyurethane (abrasive slurry and water), and ceramic for very aggressive media. Electrode materials: stainless steel 316L, Hastelloy C-22, titanium, platinum — selected to suit process chemistry. Outputs: 4–20 mA HART, Modbus RTU, PROFIBUS PA, pulse, frequency. ATEX/IECEx Zone 1 and Zone 2 versions for hazardous areas. IP67 and IP68 submersible versions for flood and below-grade installation. Applications across KSA include water metering, cooling water, effluent, acids, caustic, slurry, and produced water in oil and gas facilities.

Type 02

Vortex Flow Meters

Vortex flow meters detect vortices shed by a bluff body to measure volumetric flow of steam, gas, and liquid in a single instrument design. Available in DN25 to DN300, pressure ratings to 40 bar, temperature ratings to 400°C. No moving parts and no wear — ideal for steam metering at Saudi Arabia power and process utilities where maintenance access is limited. Integrated multivariable versions include built-in pressure and temperature sensors with an on-board flow computer that calculates compensated mass flow and energy for steam and gas applications, eliminating the need for separate transmitters and calculations. ATEX/IECEx Zone 1 and Zone 2 certified for installation in hazardous areas at refineries and petrochemical plants. Outputs: 4–20 mA HART, pulse, Modbus, FOUNDATION Fieldbus. Applications include compressed air metering, steam distribution monitoring, natural gas sub-metering, and liquid flow on clean hydrocarbon streams.

Type 03

Ultrasonic Flow Meters

Ultrasonic flow meters use transit-time (time-of-flight) technology to measure flow velocity by comparing upstream and downstream ultrasonic pulse travel times. Two primary configurations: clamp-on (external transducers mounted to pipe outer wall — no pipe cutting, no process interruption, suitable for retrofitting on existing Saudi Arabia plant pipelines) and insertion (hot-tap or flanged nozzle entry, single or dual path, for large-bore pipes DN200 to DN3000). Portable clamp-on instruments with data logger and battery operation for temporary flow surveys, commissioning verification, and energy audits. Fixed installation systems available in 1-path, 2-path, and 4-path configurations for improved accuracy on non-ideal velocity profiles. Not limited to conductive fluids — measures hydrocarbons, demineralised water, acids, solvents, and clean gases. Outputs: 4–20 mA, RS485 Modbus, pulse. IP67. Temperature range -40°C to +260°C.

Type 04

Coriolis Mass Flow Meters

Coriolis mass flow meters directly measure mass flow — independent of fluid density, viscosity, temperature, and pressure — by detecting the Coriolis force on vibrating flow tubes. Accuracy ±0.1% of reading for liquids, ±0.5% for gas. Available in sizes DN6 to DN150. Simultaneously measure mass flow rate, volumetric flow rate, density, and temperature in a single instrument. OIML R117 approved for custody transfer of liquids including hydrocarbons, petrochemicals, and edible oils. Approved for legal metrology applications in Saudi Arabia. The density measurement function makes Coriolis meters valuable for concentration measurement in caustic soda, sulphuric acid, and sugar solutions — applications found across KSA process industry. Applications: petrochemical dosing, bitumen and fuel oil transfer, LPG loading, chemical injection at Saudi Aramco water injection platforms, and pharmaceutical fill-and-finish. ATEX/IECEx Zone 1. Outputs: 4–20 mA HART, Modbus, FOUNDATION Fieldbus.

Type 05

Variable Area Flowmeters (Rotameters)

Variable area rotameters provide local visual flow indication for liquids and gases without external power. Glass tube rotameters (DN15 to DN100) for transparent-fluid applications: cooling water monitoring, chemical feed rates, laboratory and analytical instruments. Armoured metal tube rotameters (DN15 to DN150) with magnetic float and external indicator for opaque fluids, high pressure, and hazardous area duty — the preferred choice for oil, gas, and chemical plant in Saudi Arabia where glass tube is not permitted. Available with integral 4–20 mA transmitter for remote SCADA indication. Alarm switches (reed, proximity) for high or low flow trip. End connections: threaded BSP/NPT, flanged ANSI/DIN. Materials: borosilicate glass, 316 stainless steel, Hastelloy, PVC, PVDF for chemically aggressive applications. Calibrated for specific fluid and operating condition at factory — re-calibration services available. Ideal for cooling water, chemical metering, instrument air, nitrogen, and purge gas flows across KSA facilities.

Type 06

Level Instruments

Comprehensive level measurement portfolio covering continuous level transmitters and point level switches for Saudi Arabia oil, gas, water, and chemical plant tanks and vessels. Guided wave radar (GWR) transmitters: 2-wire loop-powered, rigid and flexible probe, range up to 60m, accuracy ±3mm, suitable for crude oil, chemicals, solids, and oil-water interface measurement; ATEX Zone 0. Free-space ultrasonic level transmitters: 4–20 mA, range 0.3–15m, for water, sewage, chemical, and open-channel measurement; IP68. Hydrostatic submersible pressure transmitters for liquid level by head pressure: 4–20 mA, ranges 0–1 bar to 0–40 bar; suited for sumps, water wells, and pump suction pits. Magnetic level gauges (MLG): visual side-mounted float indicator with magnetic follower, no power, for process vessels. Vibration tuning fork level switches: for point level detection in liquids and fine powders; ATEX Zone 1. Capacitance level probes and float switches for pump control and high-high alarm.

Product Catalog

Complete Flow Meter & Level Instrument Range — 25+ Products

Representative stock lines. All instruments supplied with factory calibration certificates and material traceability documents. ISO 9001:2015 QMS (CR 4030570569). Contact us with your line size, fluid type, operating pressure, temperature, and required accuracy for a tailored recommendation.

Instrument	Size Range	Accuracy	Fluid Type	Output / Standard	Pressure Rating
Electromagnetic Flow Meter — PTFE liner, SS316 electrode	DN15–DN300	±0.3%	Water, acids, caustic, chemicals	4–20 mA HART, Modbus, pulse	16 bar (PN16)
Electromagnetic Flow Meter — Rubber liner, SS316 electrode	DN50–DN1200	±0.5%	Water, slurry, effluent, abrasive media	4–20 mA HART, pulse, Modbus RTU	16 bar (PN16)
Electromagnetic Flow Meter — ATEX Zone 1, Hastelloy electrode	DN15–DN600	±0.2%	Conductive liquids, produced water, brine	HART, FOUNDATION Fieldbus, PROFIBUS PA	40 bar (PN40)
Electromagnetic Flow Meter — Large Bore, IP68	DN700–DN2000	±0.5%	Municipal water, irrigation, stormwater	4–20 mA, pulse, data logger	6 bar (PN6)
Vortex Flow Meter — Standard, DN25–DN150	DN25–DN150	±0.75%	Steam (saturated/superheated), gas, liquid	4–20 mA HART, pulse	40 bar / 350°C
Vortex Flow Meter — Multivariable with P&T, integral flow computer	DN25–DN300	±1.0%	Saturated steam, superheated steam, compressed air	HART, Modbus, mass flow + energy output	40 bar / 400°C
Vortex Flow Meter — ATEX Zone 1, DN25–DN300	DN25–DN300	±0.75%	Steam, hydrocarbon gas, LPG vapour	HART, FOUNDATION Fieldbus, pulse	40 bar / 400°C
Ultrasonic Flow Meter — Portable Clamp-On (battery)	DN50–DN3000	±1.0%	Clean liquids, hydrocarbons, water	4–20 mA, USB data logger, RS232	External (pipe rating)
Ultrasonic Flow Meter — Fixed Clamp-On, 2-channel	DN50–DN2000	±1.0–1.5%	Water, chemicals, hydrocarbons (non-intrusive)	4–20 mA, Modbus RTU, pulse	External (pipe rating)
Ultrasonic Flow Meter — Insertion, hot-tap, DN200–DN3000	DN200–DN3000	±1.0%	Water, effluent, cooling water, sea water	4–20 mA HART, Modbus, pulse	16 bar (PN16)
Coriolis Mass Flow Meter — DN6–DN25 (high accuracy)	DN6–DN25	±0.1%	Liquids, LPG, dense gases, chemicals	HART, Modbus, FOUNDATION Fieldbus, density output	100 bar
Coriolis Mass Flow Meter — DN50–DN150 (custody transfer)	DN50–DN150	±0.1–0.15%	Hydrocarbons, petrochemicals, food liquids	HART, OIML R117 custody transfer, density output	40 bar
Rotameter — Glass Tube, DN15–DN50	DN15–DN50	±2.0%	Clean water, instrument air, nitrogen, light solvents	Visual local indication; optional alarm switch	10 bar
Rotameter — Armoured Metal Tube with 4–20 mA transmitter	DN15–DN150	±1.5%	Oil, gas, steam, aggressive chemicals, opaque fluids	4–20 mA HART, local indicator, alarm switch	40 bar
Guided Wave Radar Level Transmitter — rigid probe	Range 0–6m	±3mm	Liquids, hydrocarbons, solvents, interface	4–20 mA HART, Modbus; ATEX Zone 0	40 bar / 150°C
Guided Wave Radar Level Transmitter — flexible cable probe	Range 0–35m	±5mm	Crude oil, fuel oil, storage tanks, solids	4–20 mA HART; ATEX Zone 0/1	16 bar / 150°C
Ultrasonic Level Transmitter — 2-wire 4–20 mA	Range 0.3–8m	±0.25%	Water, effluent, chemical tanks, open channels	4–20 mA, relay alarm, HART; IP67	Atmospheric
Hydrostatic Submersible Level Transmitter	Range 0–100m WC	±0.1%	Water, sewage, sea water, sumps, boreholes	4–20 mA, IP68 / ATEX Zone 1 option	10–100 bar (range dependent)
Magnetic Level Gauge (MLG) — side-mounted visual indicator	Range 0.3–3m	±3mm	Process liquids, hydrocarbons, chemicals, cryogenics	Visual float indicator; reed switch alarms optional	160 bar
Vibration Fork Level Switch — liquid point level	Point detection	N/A (switch)	Liquids (density >0.5 g/cm³), water, oil, chemicals	Relay SPDT, 4–20 mA option; ATEX Zone 0/1	100 bar / 150°C
Capacitance Level Probe — continuous / point	Range 0–5m	±1%	Water, oil, granules, powders, coated rod for sticky fluids	4–20 mA, relay; ATEX Zone 1	40 bar
Float Level Switch — side-mounted, stainless steel	Point detection	N/A (switch)	Water, oil, chemical tanks — pump start/stop	SPDT reed switch, IP67	16 bar
DP Differential Pressure Flow Transmitter — orifice / Pitot	DN25–DN2000	±0.075%	Gas, steam, liquid, clean service	4–20 mA HART, FOUNDATION Fieldbus; ATEX Zone 1	420 bar
Orifice Plate Assembly — flanged, to ISO 5167	DN25–DN1200	±0.5–1.5%	Gas, steam, liquid	ISO 5167, ASME MFC-3M; flanged ANSI 150–ANSI 2500	ANSI 150–ANSI 2500
Annubar Averaging Pitot — large bore insertion	DN100–DN3000	±0.5%	Gas, steam, liquid; large pipelines	DP output to transmitter; hot-tap retractable	40 bar
Open Channel Flow Measurement — weir / flume + ultrasonic	Range 0–5m head	±1.5%	Irrigation channels, sewage, stormwater — KSA water authority	4–20 mA, data logger, RS485 Modbus	Atmospheric

Flow Meters & Level Instruments Supplier Saudi Arabia — Electromagnetic, Vortex & Ultrasonic Flow Meters In Stock

Product Types in Stock

Electromagnetic Flow Meters (Mag Meters)

Vortex Flow Meters

Ultrasonic Flow Meters

Coriolis Mass Flow Meters

Variable Area Flowmeters (Rotameters)

Level Instruments

Complete Flow Meter & Level Instrument Range — 25+ Products

Why Industrial Buyers in Saudi Arabia Choose Gulf Union Ozone for Flow & Level Instruments

Same-Day Dispatch from Jeddah

Factory Calibration Certificates

ISO 9001:2015 Certified Quality

Nationwide KSA Delivery

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