Brand: KROHNE

KROHNE OPTIWAVE 7500 Radar Level Transmitter

Name: KROHNE OPTIWAVE 7500 Level Transmitter – Datasheet & Quote
Brand: KROHNE

Description

Overview

KROHNE OPTIWAVE 7500 is a 2-wire, 80 GHz FMCW radar level transmitter purpose-built for the most demanding liquid level applications: narrow tanks with long nozzles, and vessels crowded with internal obstructions such as agitators or heating coils. The KROHNE OPTIWAVE 7500’s exceptionally small beam angle and negligible dead zone let it deliver continuous, non-contact level measurement across an enormous range, from the smallest process vessels to storage tanks up to 100 m / 328 ft tall, and its 80 GHz signal can even measure through tank roofs built from non-conductive materials.

With engineering support in Muscat, Seven Star LLC supplies the KROHNE OPTIWAVE 7500 radar level transmitter to refineries, chemical plants, and process industries across Oman and the wider GCC. Every unit supplied through Seven Star LLC comes with manufacturer documentation and access to local technical support – helping facility engineers and procurement teams in Muscat, Sohar, and Salalah receive a correctly specified KROHNE OPTIWAVE 7500 instrument.

Measurement Principle

The KROHNE OPTIWAVE 7500 operates on frequency-modulated continuous-wave (FMCW) radar principles. The transmitter continuously emits an 80 GHz microwave signal toward the liquid surface through its flush-mounted PEEK or PTFE Lens antenna, and measures the frequency difference between the transmitted and reflected signal to calculate the precise distance to the surface, from which tank level, volume, or mass is derived. Because the antenna is flush-mounted with no protrusion into the vessel, there is no mechanical intrusion for the process fluid to foul, and the technology remains unaffected by changes in vapor, temperature, or pressure inside the tank.

This measuring principle gives the KROHNE OPTIWAVE 7500 several practical advantages in difficult tank geometries. Its narrow 4° beam angle allows the signal to pass cleanly around agitators, heating coils, and other internal obstructions without generating false echoes, while the built-in empty tank spectrum function and Tank Bottom Management (TBM) algorithms filter or compensate for irregular reflections at the tank bottom or when the vessel runs empty. The result is reliable, accurate level data in vessels where mechanical or ultrasonic level instruments routinely struggle.

Engineering Design of the KROHNE OPTIWAVE 7500

The KROHNE OPTIWAVE 7500 is a 2-wire, loop-powered transmitter with HART 7 communication, offered with a wide range of flange and thread process connections starting from ¾″. Its PEEK Lens antenna is insensitive to product deposits and well suited to corrosive process environments, with an optional 112 mm / 4.4″ antenna extension available for installations on long nozzles. The device operates across process temperatures up to +150°C / +302°F and pressures up to 40 barg / 580 psig, and is rated for accuracy to ±2 mm.

Configuration and commissioning are handled through a large, backlit LCD display with a 4-button keypad operated externally via bar magnet – no need to open the housing cover in hazardous or hard-to-access installations. Free PACTware and HART DD/DTM software provide full parameterization support from a laptop, and the transmitter carries extensive self-diagnostics compliant with NAMUR NE 107, along with approvals for use in hazardous areas and a standard 3-year warranty.

Key Features

The KROHNE OPTIWAVE 7500 delivers a combination of measuring range, obstruction tolerance, and diagnostic depth that makes it the reference radar level transmitter for difficult liquid applications, and this is exactly why the KROHNE OPTIWAVE 7500 is specified so widely across the process industry.

An 80 GHz FMCW radar signal with a narrow 4° beam angle allows accurate measurement in narrow tanks and vessels with internal obstructions such as agitators or heating coils.
The measuring range extends from the antenna up to 100 m / 328 ft, covering everything from small process vessels to tall storage tanks.
Flush-mounted PEEK and PTFE Lens antennas eliminate tank intrusion and resist buildup in corrosive or fouling liquid environments.
Tank Bottom Management (TBM) and an empty tank spectrum function filter false reflections, ensuring reliable readings even in empty or near-empty vessels.
The device operates across process temperatures up to +150°C and pressures up to 40 barg, suiting demanding chemical and petrochemical duties.
A 2-wire, loop-powered design with HART 7 communication simplifies wiring and integration into existing control and monitoring systems.
The radar signal can penetrate tank roofs made of non-conductive materials, enabling level measurement without a dedicated nozzle in some installations.
Accuracy of ±2 mm and extensive NE 107-compliant diagnostics support tight process control and predictive maintenance.

Industrial Applications

The KROHNE OPTIWAVE 7500 is deployed across the chemical industry, petrochemical and oil and gas processing, and power generation wherever continuous, non-contact level measurement is required in tanks with challenging geometry or internal fittings. Typical duties include reactors, storage tanks, process vessels with agitators, and narrow tanks with long installation nozzles where conventional level technologies lose accuracy or reliability.

Backed by manufacturer datasheet documentation, Seven Star LLC distributes the KROHNE OPTIWAVE 7500 to refineries, chemical processing plants, and RO desalination facilities throughout Oman and the GCC. The transmitter is a strong fit for the petrochemical complexes of Sohar and Salalah, as well as for process plants across Muscat that require dependable, obstruction-tolerant level measurement for reactors, storage vessels, and custody-critical tanks.

Technical Specifications

The table below summarizes the core specifications of the KROHNE OPTIWAVE 7500 radar level transmitter as supplied by Seven Star LLC.

Parameter	Specification
Model	KROHNE OPTIWAVE 7500
Measuring Principle	80 GHz FMCW radar
Measuring Range	0 – 100 m / 0 – 328 ft
Beam Angle	4° (DN70 / 6″ Lens antenna)
Accuracy	±2 mm / ±0.08 in
Antenna Materials	PEEK, PTFE Lens antenna
Process Temperature	-50°C to +150°C (-58°F to +302°F)
Process Pressure	Up to 40 barg / 580 psig
Process Connections	Flange and thread, from ¾″
Communication	2-wire, loop-powered, HART 7
Diagnostics	NAMUR NE 107, Tank Bottom Management (TBM), empty tank spectrum function
Typical Applications	Chemical, petrochemical, oil & gas, power generation

Request a Quote for KROHNE OPTIWAVE 7500 Radar Level Transmitter

Seven Star LLC supports the full procurement cycle for the KROHNE OPTIWAVE 7500 radar level transmitter, from formal RFQ submission to availability and lead-time confirmation, technical datasheet delivery, and direct consultation with our instrumentation division on antenna selection, process connection, and tank geometry for your application. Working closely with plant engineers in the region, we supply every KROHNE OPTIWAVE 7500 transmitter on request with manufacturer documentation and dependable local technical support. Contact Seven Star LLC today to request a quotation or discuss your level measurement project.

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About brand

KROHNE is the German flow and level measurement company founded in Duisburg in 1921 as Ludwig Krohne & Sohn. Its first customers were Ruhr steel producers, for whom it built variable area flowmeters. KROHNE dates the first electromagnetic flowmeter for industrial process measurement to 1952. It is still family-owned and headquartered in Duisburg.

Seven Star LLC is an independent supplier in Muscat. We list KROHNE electromagnetic, Coriolis, ultrasonic and variable area flowmeters, radar level transmitters and flow computers, and supply them to water utilities, oil and gas and process plants in Oman and the GCC by order code.

KROHNE company profile

Established	1921, Duisburg, Germany, as Ludwig Krohne & Sohn
Early products	Variable area flowmeters for hardening furnaces in the Ruhr steel industry
Milestone	1952: first electromagnetic flowmeter for industrial process measurement, according to KROHNE
Product families	Electromagnetic, Coriolis, ultrasonic, vortex and variable area flowmeters, radar and guided radar level, flow computers and metering systems, analysers

Milestones

1921: Ludwig Krohne starts making variable area flowmeters in Duisburg for hardening furnaces in the Ruhr steel industry.
1952: First electromagnetic flowmeter for industrial process measurement, according to KROHNE.
1980: First ultrasonic flowmeter delivered to Shell for crude oil measurement.
1985: Development and production of Coriolis mass flowmeters begins.
1994: First Coriolis mass flowmeter with a single straight measuring tube.
1996: ALTOSONIC V, the first ultrasonic meter for custody transfer of liquids.

KROHNE products we list

Family	Models	Typical use
Electromagnetic flowmeters	OPTIFLUX 2000, 2100, 2300, 4100, 4300, WATERFLUX 3070, 3100, 3300	Water networks, wastewater, seawater intake and conductive process liquids
Coriolis mass flowmeters	OPTIMASS 1400, 6400	Direct mass flow and density of hydrocarbons, chemicals and LPG
Ultrasonic flowmeters	ALTOSONIC V12, OPTISONIC 3400, 6300 clamp-on, 7300 gas	Gas custody transfer, liquid process flow and non-intrusive clamp-on checks
Variable area flowmeters	H250 M40, DK800/R	Simple, power-free flow indication for purge, sample and utility lines
Level	OPTIFLEX 7200 guided radar, OPTIWAVE 5400, 7500, 1540, OPTISWITCH 5300	Level in tanks, separators and chemical storage, and point level switching
Flow computer	SUMMIT 8800	Fiscal and custody transfer calculations for gas and liquid metering

The flowmeter principle follows the medium. Electromagnetic meters need a conductive liquid, have no moving parts and no pressure loss, and suit water and slurries. Coriolis meters measure mass flow and density directly, so they work for hydrocarbons and non-conductive liquids. Ultrasonic meters handle gas and large pipes, and multi-path designs such as the ALTOSONIC V12 are used for custody transfer. Variable area meters need no power at all and give a simple local reading.

Where KROHNE instruments are used

In Oman and the GCC, KROHNE flowmeters and level transmitters are used in water transmission and distribution, desalination, wastewater, oil and gas production and fiscal metering, refineries, petrochemical and chemical plants, and power stations.

Ordering KROHNE instruments: what we need

Send the complete KROHNE order code or the nameplate data. For a new meter, send the medium, the flow range, pressure and temperature, the pipe size and flange rating, the liner and electrode materials (for electromagnetic meters), the output and communication, and the hazardous area classification.

Facts checked against KROHNE company history (100th anniversary), October 2026.

Browse KROHNE products by category: Flowmeters, Level Transmitter, Flow Computers.

FAQ

Questions about the KROHNE OPTIWAVE 7500 Radar Level Transmitter

Answers from our engineering team on installation, compatibility and integration.

01Why is the KROHNE OPTIWAVE 7500 well suited to tanks with agitators or internal obstructions?

The KROHNE OPTIWAVE 7500 uses an 80 GHz radar signal with a very narrow 4° beam angle, which lets the signal pass around agitators, heating coils, and other internal fittings without generating false echoes. This makes it far more reliable in cluttered tank geometries than lower-frequency radar or ultrasonic technologies.

02What tank sizes and installation nozzles can the OPTIWAVE 7500 accommodate?

The transmitter measures from the antenna up to 100 m / 328 ft, covering both very small and very tall vessels. Process connections start from ¾″ thread or flange, and an optional 112 mm antenna extension is available for tanks with unusually long installation nozzles.

03Does the OPTIWAVE 7500 require special commissioning tools?

No special tools are required. Configuration is done through a backlit LCD display and 4-button keypad operated externally with a bar magnet, so the housing cover never needs to be opened, and free PACTware and HART DD/DTM software is available for full parameterization from a laptop.

04How does the OPTIWAVE 7500 perform in empty or near-empty tanks?

The transmitter includes an empty tank spectrum function and Tank Bottom Management (TBM) algorithms that filter or compensate for irregular radar reflections at the tank bottom, ensuring reliable, false-echo-free readings even when the vessel is empty or nearly empty.

05Is Seven Star LLC an experienced supply partner for KROHNE products?

Yes, Seven Star LLC is an experienced supplier of KROHNE in Oman and the GCC. We supply KROHNE instrumentation with calibration documentation and local technical support.