Krohne OPTISONIC 3400
- Accurate 3-path ultrasonic design.
- Large dynamic range.
- Maintenance-free, no pressure loss.
- SIL 2 safety rating.
Did you like this product? Add to favorites now and follow the product.
(+86) 132-6243-8118 Start Live Chat
Description
The Power of a Three-Path Design
At the core of the OPTISONIC 3400’s superior performance is its innovative 3-path ultrasonic measurement principle. Unlike simpler single or two-path meters, the three-path configuration provides a distinct advantage in accuracy and reliability, particularly in real-world process environments where ideal flow conditions are rare. By taking three separate measurements across different chord lines of the pipe, the meter can more effectively calculate the average flow velocity, ensuring a highly accurate reading even if the flow profile is disturbed by nearby valves, elbows, or pumps. This design also makes the meter completely immune to the effects of scaling or buildup on the pipe walls, a common issue that can degrade the performance of other technologies. The full-bore design, with no internal obstructions or moving parts, means the meter imposes no pressure loss on the process, which is a critical benefit for energy-intensive applications. This design also makes the OPTISONIC 3400 completely maintenance-free, eliminating the need for routine calibration or servicing, which translates to a significant reduction in operational expenditure and a boost in overall uptime.
A Solution for Demanding Environments
The OPTISONIC 3400 is engineered with a range of dedicated variants to conquer the most challenging and extreme process conditions. The cryogenic version (OPTISONIC 3400 LT) is specifically built to handle the bone-chilling cold of liquefied gases such as LNG, nitrogen, and oxygen, with a minimum process temperature of -200°C (-328°F). For processes involving extremely hot fluids, the extended temperature version (OPTISONIC 3400 XXT) can handle media up to +250°C (+482°F), making it ideal for applications in chemical, petrochemical, and power generation industries. The high-viscosity version (OPTISONIC 3400 HV) is a game-changer for thick liquids, accurately measuring fluids with a viscosity exceeding 1000 cSt, which would be a challenge for many other flow measurement technologies. This ability to handle such a wide range of challenging fluid properties and temperatures, all within a single product family, makes the OPTISONIC 3400 a highly versatile and dependable solution for complex industrial applications where standard meters simply cannot perform.
Versatility Across Industries and Functions
The OPTISONIC 3400’s versatility allows it to serve a vast array of specific applications across multiple industries. In the water and wastewater treatment sector, the meter’s ability to handle large diameters (up to DN3000 / 120″) makes it the perfect choice for monitoring main water transportation pipelines, ensuring efficient distribution and billing. Its bi-directional flow measurement capability is crucial for these large pipes, as it can accurately measure flow in both directions, which is essential for leak detection and network management. In the oil and gas industry, the meter’s high-pressure rating (up to 180 barg / 2600 psig) makes it suitable for both upstream and downstream applications, from injection to refining processes. The OPTISONIC 3400 is also indispensable in the chemical industry, where its variants can handle everything from corrosive acids to highly viscous polymers. For smaller-scale tasks, the meter’s smaller sizes are ideal for dosing and batching applications where precise and repeatable liquid measurement is critical for product quality. Its full-bore design and lack of moving parts also make it suitable for a wide range of food and beverage applications where product integrity must be maintained.
Engineered for Durability and Insight
The OPTISONIC 3400 is a testament to the power of smart engineering, designed not only for high-performance measurement but also for long-term durability and operational insight. Its full bore design with no moving parts means there is nothing to wear out or break, ensuring a long and reliable service life. This simple yet robust construction from Austenitic stainless steel (1.4404/316L) provides exceptional resistance to corrosion and stress, even under the most demanding conditions. Beyond its physical robustness, the OPTISONIC 3400 is equipped with extensive sensor and process diagnostics, which can proactively detect and alert operators to potential issues. The meter’s diagnostic capabilities are compliant with NAMUR NE 107, providing clear and easily interpretable status messages (e.g., “Failure,” “Function Check,” “Maintenance Required”). This allows operators to move from reactive to predictive maintenance, addressing issues before they cause costly downtime. This blend of physical durability and intelligent diagnostics ensures that the OPTISONIC 3400 is not just a measurement device but a core component for ensuring a process runs smoothly and reliably.
Meeting the Highest Safety Standards
In a world where safety is paramount, especially in high-risk industries, the OPTISONIC 3400 is built to meet and exceed the most stringent global standards. The meter is certified for use in Safety Instrumented Systems (SIS) with a SIL 2 rating. This certification is a formal assurance that the device meets a specific level of reliability for critical safety functions. In applications where a flowmeter is part of a system designed to prevent catastrophic events (like an emergency shutdown or an overfill), a SIL rating is an absolute necessity. Furthermore, the OPTISONIC 3400 is available with Nuclear qualification on request, complying with standards such as ASME III and RCC-M/E. This capability demonstrates that the meter’s design, materials, and manufacturing process are robust enough for the incredibly demanding and unforgiving environment of nuclear power plants. This combination of SIL and Nuclear-grade approvals positions the OPTISONIC 3400 as a flowmeter that can be trusted with the highest level of responsibility in industries where reliability is a matter of life and death.
Flexible Integration for Any System
The OPTISONIC 3400 offers an exceptional degree of flexibility, both in its physical installation and its digital integration into control systems. The meter is available in a compact version (C) with the converter electronics directly mounted on the sensor, or as a field-mounted version (F) with a separate converter unit. This field-mounted option allows for a cable length of up to 30 m (90 ft), providing installation flexibility in tight or hard-to-reach locations. The field housing can also be specified with an optional IP68 rating, ensuring it can withstand temporary submersion in water, making it perfect for installation in flood-prone areas. For communication, the OPTISONIC 3400 offers a comprehensive suite of digital protocols, including HART®, Modbus, FOUNDATION™ Fieldbus, Profibus-PA, and Profibus-DP. This wide range of options ensures that the meter can be seamlessly integrated into virtually any existing or new plant control architecture, eliminating the need for costly and complex communication gateways or workarounds. This commitment to physical and digital flexibility makes the OPTISONIC 3400 a truly adaptable solution.
The Pinnacle of Flow Measurement
The OPTISONIC 3400 represents the pinnacle of ultrasonic flow measurement technology, offering a perfect blend of high accuracy, unparalleled versatility, and long-term reliability. Its innovative 3-path design, combined with its ability to handle a vast range of fluid properties and extreme temperatures, sets a new standard for performance in the process industry. The meter’s full-bore, no-moving-parts construction ensures a maintenance-free experience, while its advanced diagnostics provide critical insights for proactive maintenance. When you consider its extensive list of safety and regulatory certifications, it is clear that the OPTISONIC 3400 is not just a piece of equipment but a strategic asset for any industrial operation. For those looking to invest in a product that guarantees this level of authenticity, quality, and performance, tpt24 online store is the world’s leading online retailer. Every OPTISONIC 3400 delivered from tpt24 comes with a complete guarantee of authenticity and quality, ensuring that no matter your location, you receive a genuine, certified product with a global delivery promise.
Specifications
Specifications
Depending on selected device configuration
General information
| Product type | Flowmeter |
| Product family name | OPTISONIC |
| Product positioning | For liquid process applications |
| Product variants | OPTISONIC 3400 – Standard version in compact (C) or field housing (F) OPTISONIC 3400 HV – High viscosity version OPTISONIC 3400 LT – Low-temperature version OPTISONIC 3400 XXT – Extended temperature version |
| Measurement principle | Ultrasonic |
| Measured media | Liquids |
Operating conditions
| Process pressure | max. 180 barg/ 2600 psig |
| Process temperature | -200…+250°C/ -328…+482°F |
Materials
| Measuring tube | Austenitic stainless steel (1.4404/316L) |
Process connections
| Flange connections | EN (1092-1): DN25…3000 ASME (B 16.5): 1…120″ JIS (B 2220): 25…300A |
Approvals/Standards
| Certificates/Approvals Nuclear | Nuclear qualification on request (e.g. acc. to ASME III, RCC-M/E, etc.) |
| Certificates/Approvals Safety | SIL 2 |
Communication
| Analogue outputs | 4…20 mA |
| Discrete outputs | Limit switches, Pulse, Frequency, Status |
| Digital outputs | FOUNDATION™ Fieldbus, HART®, Profibus-PA, Profibus-DP, Modbus RTU |











