ROSEMOUNT 8705THA080P1W0N0B3Q4CR Magnetic Flowtube 8IN 40V-DC

( Brand: Rosemount ), ( Manufacturer Part Number: 8705THA080P1W0N0B3Q4CR ), ( Size: 8 In ), ( Voltage: Dc ), ( Reference Sku: 1749775 ), ( Product Condition: Used Excellent )

Review ROSEMOUNT Magnetic Flowtube 8in

The Rosemount 8705THA080P1W0N0B3Q4CR Magnetic Flowtube is a high-performance, durable, and precision-engineered flow measurement solution designed for demanding industrial applications requiring reliable liquid flow monitoring. This 8-inch (200 mm) diameter flowtube is part of Rosemount s renowned **8700 Series**, a family of electromagnetic flowmeters renowned for their robustness, accuracy, and long-term stability in challenging environments. Built with a **316L stainless steel** flowtube, this model is engineered to withstand aggressive chemicals, high temperatures, and corrosive fluids, making it ideal for industries such as water and wastewater treatment, chemical processing, pharmaceutical manufacturing, and food and beverage production. The **40V DC power supply** ensures compatibility with a wide range of control systems and instrumentation, providing flexibility in integration with existing plant infrastructure.

The flowtube features a **smooth, non-ferromagnetic lining** typically **PTFE (polytetrafluoroethylene)** which enhances chemical resistance, reduces maintenance requirements, and ensures consistent flow characteristics for accurate measurement across a broad range of conductive liquids, including water, acids, bases, slurries, and other corrosive fluids. The **electromagnetic design** eliminates moving parts, reducing wear and tear while maintaining high accuracy and repeatability, even under turbulent flow conditions. With a **dual-electrode configuration**, this flowtube minimizes electrode fouling and provides superior signal stability, further enhancing reliability in demanding applications.

The Rosemount 8705THA080P1W0N0B3Q4CR is equipped with **Rosemount s advanced signal processing technology**, which delivers exceptional accuracy (typically ** 0.5% of reading** or ** 0.2% of rate**) and low turbulence sensitivity, ensuring consistent performance even in applications with fluctuating flow conditions. The **pulse output (P1)** and **4-20 mA analog signal (W0)** options provide versatile communication capabilities, allowing seamless integration with PLCs, SCADA systems, or other industrial control platforms. Additionally, the **N0** designation indicates a **non-intrusive, clamp-on installation option**, though this specific model is designed for **in-line mounting**, offering a compact and efficient solution for pipeline applications.

Constructed to meet stringent industry standards, including **AWWA C509** for water and wastewater applications, this flowtube is built to endure high-pressure environments (up to **250 psi or 17.2 bar**) and extreme temperatures (ranging from **-20 C to 120 C**), making it suitable for both indoor and outdoor installations. The **B3Q4CR** designation includes **Rosemount s advanced diagnostic capabilities**, such as **electrode monitoring, flow disturbance detection, and process variable tracking**, which help operators proactively maintain system performance and reduce downtime. Whether deployed in a municipal water treatment facility, a chemical processing plant, or a pharmaceutical manufacturing line, this flowtube delivers unmatched precision, durability, and operational efficiency, ensuring reliable flow measurement where it matters most.

**Pros and Cons of buying a Rosemount 8705THA080P1W0N0B3Q4CR Magnetic Flow Tube (8" Diameter, 40V-DC)**

### **Pros**

1. **High Accuracy and Reliability**

The Rosemount 8705 series is known for its precision in measuring liquid flow, particularly in industrial applications. It uses advanced electromagnetic technology to provide consistent readings across a wide range of flow rates, making it suitable for critical processes where accuracy is essential.

2. **Durable Construction**

The flow tube is made from high-quality materials designed to withstand harsh environments, including corrosive liquids, high temperatures, and mechanical stress. The 8-inch diameter ensures it can handle large flow volumes without significant pressure drops.

3. **Wide Range of Applications**

This model is versatile and can be used in various industries such as water treatment, chemical processing, food and beverage, and wastewater management. It supports both conductive and non-conductive liquids (with the right electrodes), expanding its usability.

4. **Low Maintenance Requirements**

Unlike mechanical flow meters, electromagnetic flow meters have no moving parts, reducing wear and tear. The absence of obstructions (such as turbines or pistons) also minimizes clogging risks, leading to lower maintenance costs over time.

5. **Compatibility with Rosemount s Ecosystem**

The 8705 series integrates seamlessly with Rosemount s broader range of transmitters, controllers, and monitoring systems. This ensures easy installation, calibration, and data logging within existing industrial control networks.

6. **Energy Efficiency**

Operating on 40V-DC, the flow tube is designed to be power-efficient, which can reduce operational costs in long-term deployments. The low power consumption also makes it suitable for remote or battery-powered applications.

7. **Long Lifespan**

With proper installation and maintenance, Rosemount s electromagnetic flow tubes are known for their longevity, often lasting decades in industrial settings. This reduces the need for frequent replacements and associated downtime.

8. **Compliance with Industry Standards**

Rosemount products are designed to meet or exceed industry standards such as ISO, ANSI, and API, ensuring reliability and regulatory compliance in applications where certification is required.

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### **Cons**

1. **High Initial Cost**

The Rosemount 8705 series is a premium product, and the upfront cost can be significantly higher than that of alternative flow meters, such as mechanical or ultrasonic models. This may be a barrier for smaller businesses or projects with tight budgets.

2. **Limited to Conductive Liquids (Without Modifications)**

While the standard model works well with conductive liquids (e.g., water, wastewater, chemicals), it may require additional electrodes or modifications for non-conductive liquids (e.g., oils, organic solvents). This could add complexity and cost to the installation.

3. **Installation Requirements**

Proper installation is critical for accuracy and performance. The flow tube must be installed in a straight section of piping with adequate upstream and downstream lengths to avoid turbulence or swirl, which can affect readings. Improper installation can lead to inaccurate data or meter failure.

4. **Sensitivity to Pipe Material and Condition**

The flow tube must be matched to the pipe material (e.g., stainless steel, carbon steel) to avoid galvanic corrosion or signal interference. If the pipe is damaged or lined, it may require additional preparation or a different flow tube model.

5. **Calibration Needs**

While electromagnetic flow meters are generally low-maintenance, they still require periodic calibration to ensure accuracy, especially in applications where flow rates fluctuate significantly. Calibration may need to be performed by trained personnel, adding to operational costs.

6. **Limited Support for Gases**

This model is designed for liquid flow measurement and is not suitable for gases. If gas flow measurement is required, a different type of meter (e.g., turbine, vortex, or ultrasonic) would be necessary.

7. **Potential for Signal Interference**

In environments with strong electromagnetic interference (EMI), the flow meter s readings may be affected. Shielding or proper grounding may be required to mitigate this issue, adding complexity to the installation.

8. **Vendor Dependency**

As a branded product, maintenance, spare parts, and technical support may rely on the vendor s availability and pricing. For remote or off-grid applications, access to service providers could be a concern.

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### **Conclusion**

The Rosemount 8705THA080P1W0N0B3Q4CR magnetic flow tube is a high-performance, reliable, and durable solution for industrial liquid flow measurement. Its strengths lie in its accuracy, low maintenance, and compatibility with Rosemount s ecosystem, making it ideal for critical applications where precision and longevity are paramount. However, its high cost, specific installation requirements, and limitations with non-conductive liquids or gases may not make it suitable for all applications or budgets.

For applications requiring large-volume liquid flow measurement in conductive media, with a focus on long-term reliability and minimal maintenance, this flow tube is an excellent choice. For smaller-scale or budget-constrained projects, or applications involving gases or non-conductive liquids, alternative flow meters may be more cost-effective or practical.

### **Recommendation**

- You are measuring large volumes of conductive liquids (e.g., water, wastewater, chemicals) in an industrial setting.

- Accuracy, durability, and low maintenance are top priorities.

- You are already using or plan to integrate Rosemount s instrumentation ecosystem.

- Your budget can accommodate the higher initial cost, justified by long-term savings in maintenance and downtime.

- Your application involves non-conductive liquids or gases, as modifications or a different meter type may be required.

- Budget constraints are a significant factor, and you can find a similarly reliable meter at a lower cost.

- The installation environment has extreme electromagnetic interference or requires non-standard pipe materials, which could complicate setup.

For most industrial liquid flow applications where performance and reliability are critical, the Rosemount 8705 series remains a strong recommendation. Ensure proper installation, calibration, and maintenance to maximize its lifespan and accuracy.

Details:

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part #: 8705tha080p1w0n0b3q4cr prices

• $318.90-$894.60

specifications pneumativalv:

• brand: Rosemount
• mpn: 8705tha080p1w0n0b3q4cr
• size: 8 In
• voltage: Dc
• reference sku: 1749775
• product condition: Used Excellent

offer pneumativalv:

• sold: 0
• options: Ship-to-home
• started: March 10, 2026
• quantity: 2
• availability: In Stock
• best offers: True

seller pneumativalv:

• city: Delta, Ohio
• # reviews: 125083
• rating: 100.0%

payments pneumativalv:

• other
• credit card: Discover
• wallet: Apple-pay

returns pneumativalv:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller
• method: Money back

shipping pneumativalv:

• transit: 2-6 Days
• service: Standard, Expedited, Overnight
• cost: $0.00
• type: Fixed
• class: Standard, Expedited, One-day

general pneumativalv:

• condition: Used
• Pump Flow Controllers > Flow Controllers Meters > Flow Meters

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