Rosemount 8700 Series Magnetic Flowmeter
Overview: A Proven Magnetic Flowmeter Platform
The Rosemount 8700 Series Magnetic Flowmeter is a field-proven electromagnetic flowmeter platform consisting of a sensor installed in-line with process piping and a transmitter that can be mounted remotely or integrally on the sensor. The 8700M platform offers multiple sensor styles – including the Rosemount 8705 flanged sensor, 8711 wafer sensor, and 8721 hygienic (sanitary) sensor – all compatible with the 8700 Series transmitter family, giving specifiers a proven, modular magnetic flowmeter solution across water, wastewater, and general utility applications.
As a trusted supplier of Rosemount (Emerson) flow instrumentation, Seven Star LLC sources and supplies the 8700 Series magnetic flowmeter to water authorities, wastewater treatment plants, and industrial utility systems across Oman and the wider GCC. Because sensor style, size, and transmitter selection must be matched to the specific pipe and process, Seven Star LLC helps engineering teams configure the correct 8700 Series combination for each metering point.
Measurement Principle
The 8700 Series measures flow via Faraday’s law of electromagnetic induction: as electrically conductive liquid flows through the sensor’s magnetic field, electrodes detect a voltage signal proportional to flow velocity. The Rosemount 8705 flanged sensor delivers accuracy up to ±0.15% of volumetric flow rate over a 13:1 flow turndown, or ±0.25% over a wider 40:1 turndown, giving specifiers a choice between tighter accuracy across a narrower flow range or broader rangeability with a modest accuracy trade-off.
Rosemount Magnetic Flowmeter Diagnostics detect and warn of abnormal situations throughout the meter’s life, from installation through maintenance and meter verification, accessible via the Local Operator Interface (LOI), ProLink III software, a HART Field Communicator, or AMS Suite: Intelligent Device Manager. This diagnostic capability allows plant staff to identify installation issues or developing problems early, rather than discovering them only after measurement accuracy has already degraded.
Engineering Design of the 8700 Series
The 8705 flanged sensor supports ASME B16.5 Class 150-2500, DIN PN 10-40, and AS 2129 Table D / AWWA C207 Table 3 Class D (30-36 inch only) flange ratings, with liner material options including PFA, PTFE, ETFE, polyurethane, neoprene, and Linatex natural rubber to suit different process media compatibility requirements. The sensor is compatible with all current 8700 Series transmitters as well as legacy transmitters (8712D, 8712C, 8732C, 8742C), supporting straightforward transmitter upgrades on existing sensor installations without full flowmeter replacement.
The 8700 Series offers extensive hazardous location certification options including FM, CSA, and ATEX approvals, with equivalent certifications required to match between flowtube sensor and transmitter in integrally mounted systems (remote-mounted systems do not require matched certifications). Communication options across the transmitter family include HART, Modbus RS-485, fieldbus, and pulse output, and the 8750W variant specifically targets utility, water, and wastewater applications with both integral and remote transmitter configurations available.
Key Features
The Rosemount 8700 Series Magnetic Flowmeter delivers proven, modular flow measurement for utility applications. Key characteristics include:
- Multiple sensor styles: flanged (8705), wafer (8711), hygienic/sanitary (8721).
- Accuracy up to ±0.15% of volumetric flow rate over 13:1 turndown; ±0.25% over 40:1.
- Compatible with all current 8700 Series transmitters and select legacy transmitters.
- Rosemount Magnetic Flowmeter Diagnostics for installation, maintenance, and verification support.
- Wide flange rating options: ASME B16.5 Class 150-2500, DIN PN 10-40, AS 2129 Table D.
- FM, CSA, and ATEX hazardous location certification options.
- Modbus RS-485, fieldbus, HART, and pulse output communication options.
Industrial Applications
The 8700 Series is deployed across water utility distribution networks, wastewater treatment plants, and general industrial process facilities wherever conductive liquid flow measurement is required. Its multiple sensor style options, including the hygienic 8721 sensor, extend its applicability to food, beverage, and life sciences applications alongside its core water and wastewater utility focus.
Seven Star LLC supports water authorities, wastewater treatment plants, and industrial facility operators across Oman, Muscat, Sohar, and the broader GCC region with sourcing of Rosemount 8700 Series magnetic flowmeters, helping projects standardize on a proven, modular flow measurement platform.
Technical Specifications
The table below summarizes the core specifications of the Rosemount 8700 Series Magnetic Flowmeter as supplied by Seven Star LLC.
| Parameter | Specification |
|---|---|
| Model | Rosemount 8700 Series (8705 flanged, 8711 wafer, 8721 hygienic, 8750W) |
| Type | Electromagnetic (magnetic) flowmeter |
| Accuracy | Up to plus or minus 0.15% (13:1 turndown); 0.25% (40:1 turndown) |
| Flange Ratings | ASME B16.5 Class 150-2500, DIN PN 10-40, AS 2129 Table D |
| Liner Materials | PFA, PTFE, ETFE, polyurethane, neoprene, Linatex natural rubber |
| Transmitter Mounting | Integral or remote |
| Communication | HART, Modbus RS-485, fieldbus, pulse output |
| Hazardous Area Approvals | FM, CSA, ATEX |
| Diagnostics | Rosemount Magnetic Flowmeter Diagnostics (LOI, ProLink III, AMS Suite) |
Why Choose Seven Star LLC for Rosemount Magnetic Flowmeters
The Rosemount 8700 Series spans three distinct sensor styles — flanged, wafer, and hygienic — each suited to a different installation context, and pairing the wrong sensor with a transmitter’s certification class can create a hazardous-area compliance gap on an integrally mounted system. Seven Star LLC confirms sensor style, liner material, and certification compatibility against your process and area classification before the order ships, drawing on our established Rosemount (Emerson) supply network across Oman and the GCC. We also support utilities and industrial plants running mixed Rosemount transmitter generations by planning legacy-to-current transmitter upgrades on existing sensors, and coordinate delivery and commissioning support to water and wastewater facilities across Muscat, Sohar, and Salalah.
Request a Quote for Rosemount 8700 Series Magnetic Flowmeter
Seven Star LLC supplies the Rosemount 8700 Series magnetic flowmeter with full manufacturer documentation and regional technical support. Contact our instrumentation division for a formal B2B quotation, to confirm the correct sensor style and transmitter combination for your application, or to obtain the complete technical datasheet. Seven Star LLC ensures every unit shipped across Oman and the GCC is genuine Rosemount (Emerson) hardware, correctly specified, and backed by local support.
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Also available: Rosemount 8800D Vortex Flowmeter
- Instruction Manual Rosemount 8700 Series Magnetic Flowmeter Manual Download
Rosemount product families on this page
Pressure includes the 3051 in its variants (3051T in-line, 3051L for liquid level, 3051CF DP flowmeter and the 3051SMV MultiVariable transmitter), the 2051 and 1199 diaphragm seal systems. Level instruments are the 3300 guided wave radar, the 5408 non-contacting radar and the 2120 vibrating fork switch. Temperature is covered by the 248 and 644 head mount transmitters and the 848T high density transmitter for multiple sensor inputs. The 8800D vortex flowmeter and the 702 wireless discrete transmitter are also listed, along with liquid analysis sensors.Where Rosemount instruments are used
These are standard instruments in oil and gas production, refining, petrochemical, power and water plants. Typical duties are line and vessel pressure, differential pressure flow across orifice plates, tank and separator level and interface, and temperature measurement on pipes, reactors and rotating equipment.Ordering Rosemount transmitters: what we need
Send the complete model string and the serial number from the nameplate; a photo is ideal. Every character of the string selects something: range, output, materials of the isolating diaphragm and flange, process connection, housing, approval and options. If you are specifying a new point, give the measured variable and span, process fluid, pressure and temperature, connection, output (4-20 mA HART, FOUNDATION Fieldbus or wireless), display and hazardous area approval. For remote seals add flange size, rating and capillary length.Browse Rosemount products by category: Pressure Instrumentation, Temperature Instrumentation, Level Transmitter, Liquid Analysis Sensors, Flowmeters.
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