100% New and Original Rosemount 8705 Electromagnetic Flowmeter for Industrial Use
|
Still deciding? Get samples of $ !
Order Sample
|
Product Details
| Customization: | Available |
|---|---|
| After-sales Service: | Maintain |
| Warranty: | 1 Year |
Shipping
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
|---|
Payment Guarantee
| Payment Methods: |
|
|---|---|
| Support payments in USD |
| Secure payments: | Every payment you make on Made-in-China.com is protected by the platform. |
|---|
| Refund policy: | Claim a refund if your order doesn't ship, is missing, or arrives with product issues. |
|---|
Secured Trading Service
Diamond Member Since 2025
Suppliers with verified business licenses
Audited Supplier Audited by an independent third-party inspection agency
Importers and Exporters
High Repeat Buyers Choice
Fast Delivery
Low MOQ
The supplier has import and export rights
More than 50% of buyers repeatedly choose the supplier
The supplier can deliver the goods within 30 days
The MOQ for the supplier's products is 1
Sign In to see all verified strength labels (18)
Find Similar Products
Basic Info.
- Model NO.
- Rosemount 8705
- Accuracy
- ±0.6-1%
- Main Application
- Water, Wastewater, Diesel Fuel, Fuel Oil, Corrosive Liquid/Gas
- Size
- DN15-DN900
- Sensor
- Tube/Flange
- Application
- Industrial Production
- Type
- Electromagnetic Flow Meter
- Measuring Media
- Liquid
- Measuring Principle
- Electrical Principles
- Measurement Object
- Closed Pipeline
- Certification
- CE
- Place of Origin
- Singapore
- Brand Name
- Rosemount
- Model Number
- 8705
- Customized Support
- OEM, ODM, Obm
- Material
- Stainless Steel
- Output
- 4-20mA
- Sensor Coil Resistance
- 2 - 20 ω
- Line Sizes
- 1/2-in. to 36-in. (15 mm to 900 mm)
- Flow Rate
- 0.04 to 39 FT/S
- Medium
- Fluid, Gas, Liquid, Oil, Water
- Measurement Range
- -58 to +350 °F (-50 to +177 °C)
- Submergence Protection
- IP68 (Recommended with Sealed Cable Glands)
- Flange Ratings
- ASME B16.5 Class 150-2500DIN Pn 10-40as 2129
- Electrode Materials
- 316L Stainless Steel, Nickel Alloy, Platinum, Tant
- Liner Materials
- PTFE, ETFE, PFA, Polyurethane, Neoprene,
- Transport Package
- Original and New
- Specification
- 50X40X40 cm
- Trademark
- Rosemount
- Origin
- Singapore
- HS Code
- 9026100000
- Production Capacity
- 1000 Piece/Year
Packaging & Delivery
- Package Size
- 50.00cm * 40.00cm * 40.00cm
- Package Gross Weight
- 8.000kg
Product Description
Product Description
Rosemount 8705 Electromagnetic Flowmeter
In the realm of industrial flow measurement, electromagnetic flowmeters (often referred to as magmeters) have emerged as a cornerstone technology for accurate, reliable measurement of conductive fluids. Unlike mechanical flowmeters that rely on moving parts or vortex flowmeters that depend on fluid dynamics around a bluff body, electromagnetic flowmeters leverage the Faraday's Law of Electromagnetic Induction to measure flow rate—eliminating issues related to mechanical wear, clogging, or pressure drop. The Rosemount 8705 Electromagnetic Flowmeter, a flagship product from Emerson Process Management, represents the pinnacle of magmeter design, tailored to meet the demanding needs of industries ranging from water and wastewater treatment to chemical processing, food and beverage, and oil and gas.
This comprehensive guide aims to provide a deep dive into the Rosemount 8705, covering its underlying working principle, innovative features, technical specifications, installation and maintenance protocols, application scenarios, and competitive advantages. By exploring these aspects in detail, engineers, plant operators, and procurement professionals will gain the knowledge needed to evaluate whether the 8705 is the right solution for their specific flow measurement challenges, and how to maximize its performance once implemented.
This comprehensive guide aims to provide a deep dive into the Rosemount 8705, covering its underlying working principle, innovative features, technical specifications, installation and maintenance protocols, application scenarios, and competitive advantages. By exploring these aspects in detail, engineers, plant operators, and procurement professionals will gain the knowledge needed to evaluate whether the 8705 is the right solution for their specific flow measurement challenges, and how to maximize its performance once implemented.
1. Working Principle of Electromagnetic Flowmeters
To fully appreciate the capabilities of the Rosemount 8705, it is first essential to understand the scientific principle that governs its operation: Faraday's Law of Electromagnetic Induction. Discovered by Michael Faraday in 1831, this law states that a voltage (electromotive force, EMF) is induced in a conductor when it moves through a magnetic field. The magnitude of this induced voltage is directly proportional to three factors: the strength of the magnetic field (B), the velocity of the conductor (v), and the length of the conductor perpendicular to the magnetic field (L). Mathematically, this relationship is expressed as:
E = B × v × L
In the context of an electromagnetic flowmeter like the Rosemount 8705, the "conductor" is the conductive fluid flowing through the pipe, and the "magnetic field" is generated by coils integrated into the flowmeter's sensor body. Here's a step-by-step breakdown of how the 8705 applies this principle to measure flow rate:
1.1 Magnetic Field Generation
The Rosemount 8705 features two opposing magnetic coils mounted on the inner wall of the flowmeter's sensor tube. These coils are energized by a low-power electrical current from the flowmeter's transmitter, creating a uniform magnetic field that spans the entire cross-section of the pipe. The magnetic field is typically alternating (AC) or pulsed DC—design choices that minimize interference from external electrical noise and reduce power consumption. In the 8705, a pulsed DC magnetic field is used, which offers superior stability in high-noise industrial environments and extends the life of the coils by reducing thermal stress.
1.2 Voltage Induction in Conductive Fluid
As the conductive fluid flows through the magnetic field, charged particles within the fluid (ions, electrons) experience a force perpendicular to both the magnetic field direction and the fluid's flow direction (Fleming's Right-Hand Rule). This force causes positive and negative charges to separate, accumulating on opposite sides of the pipe. To capture this induced voltage, the 8705 is equipped with two electrodes mounted flush with the inner wall of the sensor tube, positioned perpendicular to both the magnetic field and the flow direction. These electrodes act as collectors, measuring the voltage difference (E) generated by the charge separation.
E = B × v × L
In the context of an electromagnetic flowmeter like the Rosemount 8705, the "conductor" is the conductive fluid flowing through the pipe, and the "magnetic field" is generated by coils integrated into the flowmeter's sensor body. Here's a step-by-step breakdown of how the 8705 applies this principle to measure flow rate:
1.1 Magnetic Field Generation
The Rosemount 8705 features two opposing magnetic coils mounted on the inner wall of the flowmeter's sensor tube. These coils are energized by a low-power electrical current from the flowmeter's transmitter, creating a uniform magnetic field that spans the entire cross-section of the pipe. The magnetic field is typically alternating (AC) or pulsed DC—design choices that minimize interference from external electrical noise and reduce power consumption. In the 8705, a pulsed DC magnetic field is used, which offers superior stability in high-noise industrial environments and extends the life of the coils by reducing thermal stress.
1.2 Voltage Induction in Conductive Fluid
As the conductive fluid flows through the magnetic field, charged particles within the fluid (ions, electrons) experience a force perpendicular to both the magnetic field direction and the fluid's flow direction (Fleming's Right-Hand Rule). This force causes positive and negative charges to separate, accumulating on opposite sides of the pipe. To capture this induced voltage, the 8705 is equipped with two electrodes mounted flush with the inner wall of the sensor tube, positioned perpendicular to both the magnetic field and the flow direction. These electrodes act as collectors, measuring the voltage difference (E) generated by the charge separation.
2. Key Features of the Rosemount 8705 Electromagnetic Flowmeter
The Rosemount 8705 is engineered with a suite of features that address the unique challenges of industrial flow measurement, from harsh process conditions to the need for seamless integration with control systems. Below is a detailed exploration of its most impactful features:
2.1 High Accuracy and Repeatability Across Fluid Conditions
One of the 8705's standout attributes is its exceptional measurement accuracy, even in demanding environments. Under standard operating conditions, the flowmeter delivers an accuracy of ±0.2% of reading for volumetric flow rate, with a repeatability of ±0.1% of reading. This level of precision is maintained across a wide range of fluid properties, including:
Conductivity: The 8705 operates reliably with fluids having a conductivity as low as 5 μS/cm (microsiemens per centimeter)—a key advantage over many magmeters that require higher conductivity (e.g., 20 μS/cm or more).
2.2 Rugged Construction for Harsh Industrial Environments
Industrial processes often expose flowmeters to extreme temperatures, high pressures, corrosive fluids, and mechanical stress. The Rosemount 8705 is built to withstand these challenges through its robust construction:
2.2.1 Sensor Tube Materials
The sensor tube (the core component that houses the magnetic coils and electrodes) is available in a range of materials to match application requirements:
PTFE (Polytetrafluoroethylene): Ideal for corrosive fluids (e.g., acids, alkalis) and high-purity applications (e.g., food, pharmaceuticals) due to its chemical inertness and non-stick properties. PTFE-lined tubes are rated for temperatures up to 150°C (302°F).
PFA (Perfluoroalkoxy): A high-performance fluoropolymer with better thermal stability than PTFE, suitable for temperatures up to 200°C (392°F). It is often used in chemical processing and semiconductor applications.
2.2.2 Pressure and Temperature Ratings
The 8705 is available in multiple pressure ratings to suit different process conditions:
Standard Pressure: Up to 100 bar (1450 psi) for PTFE/PFA-lined tubes and up to 414 bar (6000 psi) for metal tubes (Hastelloy, 316L).
Temperature ratings vary by tube material, as noted above, with optional cryogenic versions available for low-temperature applications (down to -196°C (-321°F)) for fluids like liquid nitrogen or liquid oxygen.
2.1 High Accuracy and Repeatability Across Fluid Conditions
One of the 8705's standout attributes is its exceptional measurement accuracy, even in demanding environments. Under standard operating conditions, the flowmeter delivers an accuracy of ±0.2% of reading for volumetric flow rate, with a repeatability of ±0.1% of reading. This level of precision is maintained across a wide range of fluid properties, including:
Conductivity: The 8705 operates reliably with fluids having a conductivity as low as 5 μS/cm (microsiemens per centimeter)—a key advantage over many magmeters that require higher conductivity (e.g., 20 μS/cm or more).
2.2 Rugged Construction for Harsh Industrial Environments
Industrial processes often expose flowmeters to extreme temperatures, high pressures, corrosive fluids, and mechanical stress. The Rosemount 8705 is built to withstand these challenges through its robust construction:
2.2.1 Sensor Tube Materials
The sensor tube (the core component that houses the magnetic coils and electrodes) is available in a range of materials to match application requirements:
PTFE (Polytetrafluoroethylene): Ideal for corrosive fluids (e.g., acids, alkalis) and high-purity applications (e.g., food, pharmaceuticals) due to its chemical inertness and non-stick properties. PTFE-lined tubes are rated for temperatures up to 150°C (302°F).
PFA (Perfluoroalkoxy): A high-performance fluoropolymer with better thermal stability than PTFE, suitable for temperatures up to 200°C (392°F). It is often used in chemical processing and semiconductor applications.
2.2.2 Pressure and Temperature Ratings
The 8705 is available in multiple pressure ratings to suit different process conditions:
Standard Pressure: Up to 100 bar (1450 psi) for PTFE/PFA-lined tubes and up to 414 bar (6000 psi) for metal tubes (Hastelloy, 316L).
Temperature ratings vary by tube material, as noted above, with optional cryogenic versions available for low-temperature applications (down to -196°C (-321°F)) for fluids like liquid nitrogen or liquid oxygen.
Specification
Repeatability | ±0.1% of reading (all models) |
Rangeability | 100:1 |
Flow Velocity Range | 0.01 to 10 m/s (0.033 to 32.8 ft/s); optional high-velocity models up to 15 m/s (49.2 ft/s |
Protection level | IP68 |
Lining material | PTFE,ETFE,PFA, |
electrode material | 316L stainless steel, Hastelloy C-276, platinum, tantalum, titanium |
accuracy | +/-0.5%, +/-5% |
Submergence Protection | IP68 (Recommended with sealed cable glands) |
Company Profile
KeRui (Weifang) Automation Equipment Co. Ltd. Has maintained a cooperatve relationship with Rosemount for 15 years, and our purchase quantity has reached 20,000 units.
We supplied the tuning fork level gauge to the Rosemount factory and have been well received by the Beijing factory. We have cooperated with Yokowaga and maintained a cooperative relationship for 8 years, and our purchase quality has reached 7000 units.
The companies we have cooperated with:
1. Awarded "Outstanding Supplier by Yanchang Petroleum in 2008
2. In December 2012, our company was awarded the "Excellent Equipment Service Award" for the expansion project of units 6 and 7 of the Guangdong Guohua Yuedaishan Power Plant
3. Awarded "Outstanding Supplier by Yaxing Group in 2013
4.200 transmitters for Haihua Group's ethylene debottlenecking transformation project in 2015.
5. In 2018, we were rewarded as a National Nuclear Power Instrumentation Industry Measurement and Testing Alliance member.
6.160 transmitters and 20 electric autuators for the Shandong Laigang Yongfeng Steel expansion project in 2019
7.In 2022, Jinneng Chemical (Qingdao) Co., Led/ Jinneng 2x450,000 tons/ year high-performance polypropylene project (newly built) equipped 460 transmitters from our company.
8. In 2022, Shandong Qinghe Chemical Technology Co., Ltd.s hydrogen peroxide method epoxy propane device and supporting hydrogen peroxide device expansion project used 253 pressure transmitters.
9.In 2022, the Wanhua Chemical HTN project NPG installed 320 transmitters and 50 sets of valve positioners.
Certifications
Packaging & Shipping
FAQ
Q: How long will you give me the reply?
A: We will reply to you as soon as we see the information
Q: What is the delivery time?
A:The products in stock will be shipped after receiving the payment, and the products that
need to be ordered are subject to the factory time.
Q: How about your package?
A: Do not worry about the package, we have rich experience in packing.
Q: How about the payment terms?
A:You can choose T/T.
Q: What is the MOQ?
A:1PC.
Q: Can l get a lower price if l order large quantities?
A: Yes, cheaper prices with more bigger size orders.
Q:After sales and warranty?
A: We provide one year warranty lifetime technical support services.
Q:How about after-sales service?
A: We are 24 hours online, if you have any problem, please contact us directly.
){kind=link}
Send your message to this supplier
People who viewed this also viewed
Find Similar Products By Category
- Supplier Homepage
- Products
- Flow Meter
- 100% New and Original Rosemount 8705 Electromagnetic Flowmeter for Industrial Use
Related Categories
Hot Searches
More