KROHNE OPTIWAVE 7500 Radar Level Transmitter

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.

As the official authorized partner and exclusive regional representative for KROHNE, Seven Star LLC proudly supplies the KROHNE OPTIWAVE 7500 radar level transmitter to refineries, chemical plants, and process industries across Oman and the wider GCC. Every unit shipped through Seven Star LLC carries full manufacturer warranty, genuine KROHNE calibration certification, and access to local technical support – ensuring facility engineers and procurement teams in Muscat, Sohar, and Salalah receive a factory-correct KROHNE OPTIWAVE 7500 instrument backed by regional service.

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.

As the officially authorized partner for KROHNE, 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.

Call To Action

Seven Star LLC supports the full procurement cycle for the KROHNE OPTIWAVE 7500 radar level transmitter, from formal RFQ submission to regional warehouse stock availability, technical datasheet delivery, and direct consultation with our instrumentation division on antenna selection, process connection, and tank geometry for your application. As the authorized partner for KROHNE in Oman and the GCC, we ensure every KROHNE OPTIWAVE 7500 transmitter is delivered with full manufacturer warranty, calibration documentation, and dependable local technical support. Contact Seven Star LLC today to request a quotation or discuss your level measurement project.