- Automation & ControlView all 2,252 products
- Automation Accessories
- AC Drives
- PLC & I/O Cards
- Industrial Communications
- Vibration Monitoring
- Controllers & Data Acquisition
- Isolator & Barrier
- CCTV & Security
- Safety Switches & Guard Locking
- Encoders
- Motor Soft Starters
- HMI Displays
- Pneumatic Cylinders
- Industrial Computers
- Servo Drives
- Machine Vision
- Automation Software
- Robotics
Brand: Rosemount
Rosemount 8711-M/L Wafer Magnetic Flow Sensor
Description
Rosemount 8711-M/L wafer magnetic flow sensor and its code
The Rosemount 8711-M/L is the wafer (flangeless) sensor in the Rosemount 8700M platform. It is a compact, lightweight and fully welded alternative to a flanged magnetic sensor for line sizes 1½ in. (40 mm) to 8 in. (200 mm) and is supplied with alignment spacers that centre it between the pipe flanges. It works with the 8732EM and 8712EM transmitters. Seven Star LLC supplies 8711 sensors in Oman and the GCC as an independent supplier in Muscat.
The example code in the data sheet is 8711 S S A 040 L 1 K5 G5 MK3 PD P05 Q4 WG, with these positions.
| Code position | Choices |
|---|---|
| Lining | A PFA (4 and 8 mm sizes only), S PTFE, F ETFE |
| Electrode material | S 316L SST, H Nickel Alloy 276, T tantalum, P 80% Pt / 20% Ir, N titanium |
| Electrode type | A two electrodes, E plus reference, B bullet-nose, F bullet-nose plus reference (not on the smallest sizes) |
| Line size (M/L) | 015 = 1½ in., 020 = 2 in., 030 = 3 in., 040 = 4 in., 060 = 6 in., 080 = 8 in. |
| Mounting | L remote with field-replaceable terminal block; M integral socket module for use with an 8732EM; R and U legacy remote and integral cable versions |
| Mating flange rating | 1 ASME Class 150, 3 Class 300, D to H EN 1092-1 PN10 to PN40, P and R JIS 10K and 20K, U, W, Y AS4087 |
8711-M/L technical specifications
| Parameter | Specification |
|---|---|
| Manufacturer / part number | Rosemount (Emerson) 8711-M/L |
| Service | Conductive liquids and slurries, minimum 5 µS/cm |
| Line sizes | 1½ to 8 in. (40 to 200 mm) |
| System accuracy | ±0.25% of rate ±2.0 mm/s from 0.01 to 12 m/s; optional ±0.15% of rate ±1.0 mm/s to 4 m/s |
| Upper range limit | 12 m/s (39.37 ft/s) |
| Coil resistance | 10 to 18 Ω |
| Process temperature, ETFE | –29 to +149 °C |
| Process temperature, PTFE | –29 to +177 °C |
| Ambient temperature | –29 to +60 °C |
| Pressure, PTFE | Full vacuum to 740 psi (5.1 MPa) at 38 °C in 1½ to 4 in.; contact support for vacuum in 6 in. and larger |
| Submergence | IP68, remote-mount sensor, 10 m for 48 hours with approved glands |
| Non-wetted materials | 303 SST, CF3M or CF8M sensor body, rolled carbon steel coil housing, polyurethane paint |
| Wetted materials | PTFE or ETFE lining; 316L, Alloy 276, tantalum, Pt-Ir or titanium electrodes |
How the 8711-M/L measures
The sensor uses the same electromagnetic principle as every Rosemount magnetic meter: a coil-generated field crosses the bore, and the voltage induced in the conductive liquid is picked up by two electrodes. The 8711 packs the coils and electrodes into a short wafer body that sits between two pipe flanges and is held centred by the alignment spacers, so no flanges are built into the sensor. The transmitter converts the voltage to flow using the nameplate calibration number, which means a sensor and transmitter can be swapped as a matched pair of units without recalibrating the line.
The data sheet specifies an accuracy that stays at 0.25% of rate across the whole velocity range, which is useful for lines where flow swings widely, for example in chemical dosing and boiler feed.
Where the 8711-M/L fits
Choose the 8711 when the line is between 1½ and 8 in., the pressure is within Class 300 or PN40, and weight or cost matter. For larger sizes or higher flange classes use the flanged 8705-M, and for hygienic piping the 8721 sensor. Compatible transmitters are the 8732EM (integral with mounting code M or remote with code L) and the wall-mount 8712EM. The related transmitter page on our site is the Rosemount 8732EM.
Selection and ordering checklist for 8711-M/L
- Confirm the line size is 1½ to 8 in. for M/L; 4 and 8 mm and ½ and 1 in. sizes are R/U only.
- Choose PTFE for general chemicals up to 177 °C or ETFE up to 149 °C.
- Select the electrode for the liquid; reference electrodes are an option and bullet-nose is not available in the smallest sizes.
- Pick the mounting code: M for integral with an 8732EM, L for remote.
- Match the mating flange rating so the right spacers are supplied.
- Choose the hazardous-area code (K5, N5, KD and others as listed in the options table) and quality certificate.
Installation, commissioning and maintenance of the 8711-M/L
Slide the sensor between the mating flanges with the three alignment spacers, centre it, and tighten the bolts evenly following the data sheet torque instructions. Keep at least five straight diameters upstream and two downstream, fit grounding rings or a reference electrode for the process ground, and keep the line full. With a remote connection use the cable and enter the calibration number into the transmitter. There are no wear parts; maintenance is checking electrical connections and reviewing transmitter diagnostics such as electrode coating and high noise.
Typical applications in Oman and the GCC
Wafer sensors are well suited to skid-mounted dosing, utility water, chiller loops, boiler feed, desalination chemical injection and small process lines in power and petrochemical plants where space and weight are limited. The welded body resists moisture and humidity common on Gulf coastal sites, and the remote version can be flooded without losing its IP68 rating.
Information to send with an RFQ for 8711-M/L
- Line size and mating flange standard and class.
- Process fluid, temperature, pressure, conductivity and flow range.
- Lining, electrode material and electrode type.
- Integral or remote mounting and transmitter model.
- Hazardous-area requirement and cable length.
- Quantity and delivery site.
Documents and quotation
Send the 8711 code and we will confirm availability and the official documents we can share for it. The platform data sheet is a large file, so we provide the right document with the quotation.
Other Models in the Rosemount 8700m Magmeter Range
Seven Star LLC supplies models from the Rosemount 8700m Magmeter range in Oman and the GCC. Compare the related models below and request a quote for the one that matches your application.
| Model | Category | |
|---|---|---|
| Rosemount 8732EM Field Mount Magnetic Flow Transmitter | Flowmeters | View details |
| Rosemount 8705-M Flanged Magnetic Flow Sensor | Flowmeters | View details |
| Rosemount 8711-M/L Wafer Magnetic Flow Sensor | Flowmeters | You are viewing this model |
Reviews (0)
About brand
Rosemount is Emerson's brand for pressure, temperature, level and flow measurement, best known for the 3051 pressure transmitter. Frank Werner, Robert Keppel and Vernon Heath founded it in Minnesota in 1956 as Rosemount Engineering Company, first making temperature sensors for aerospace. It moved into the process industries, took the name Rosemount Inc. in 1966, and has been part of Emerson since 1976.
Seven Star LLC is an independent supplier in Muscat. We list Rosemount transmitters, level instruments, flowmeters and analytical sensors, and supply them and their spares to oil and gas, power, water and process plants in Oman and the GCC by model code.
Rosemount company profile
Established1956, Minnesota, USA, as Rosemount Engineering Company
FoundersFrank D. Werner, Robert E. Keppel and Vernon H. Heath
OwnershipAcquired by Emerson in 1976; now an Emerson brand
Product familiesPressure, DP flow and level transmitters, temperature sensors and transmitters, radar and guided wave radar level, vibrating fork switches, tank gauging, magnetic, vortex and ultrasonic flowmeters, liquid analysis sensors and wireless instruments
Milestones
1956: Robert Keppel, Vernon Heath and Frank Werner incorporate Rosemount Engineering Company in Minnesota; early work is aerospace sensors.
1969: The Rosemount 1151 analog pressure transmitter is introduced.
1976: Emerson acquires Rosemount.
1989: The Rosemount 3051 pressure transmitter, built on digital technology, is launched.
2001: The 3051S generation follows.
Rosemount products we list
FamilyModelsTypical use
Pressure transmitters3051, 3051C coplanar, 3051T in-line, 3051S, 3051S series, 3051SMV multivariable, 2051, 2088, 1199 diaphragm sealsPressure, differential pressure and remote seal measurement
DP flow and DP level3051CF flowmeter, 3051L, 3051SALFlow through primary elements, and level in pressurised vessels
Temperature644, 248, 3144P, 848T, 648 wireless, 214C RTD sensor, 2240S multi-inputProcess temperature, high-density multipoint and tank temperature
Radar and level5408, 5400, 5300 GWR, 3300 GWR, 3308A wireless, 5900S, 5900C tank gaugesLevel in tanks, separators and custody transfer tank gauging
Level switches2120, 2140, 2160 wireless, 702 discrete transmitterHigh and low level alarms, overfill protection and pump protection
Flowmeters8700 magnetic, 8800D vortex, SeniorSonic 3414, 3415/3416, 3417, JuniorSonic 3411/3412, 3814 liquidWater, steam and gas flow, and fiscal gas and liquid metering
Liquid analysis396P TUpH, 396PVP, 499ACL chlorine sensorpH, ORP and free chlorine in water and process streams
Many Rosemount transmitters share one platform, so the model code tells you what you have. On a 3051, the letter after the number sets the type: C for coplanar (differential or gauge), T for in-line, L for liquid level and CF for a complete flowmeter. The next characters set the measurement type, the range code, the output (4-20 mA HART, FOUNDATION Fieldbus or WirelessHART) and the wetted materials. A transmitter with the wrong range code may work, but with poor accuracy at the point that matters.
Where Rosemount instruments are used
In Oman and the GCC, Rosemount instruments are used across upstream oil and gas, gas plants and LNG, refineries, tank farms and terminals, power and desalination stations, and water networks. Ultrasonic gas meters and tank gauges are used for fiscal and custody transfer measurement.
Ordering Rosemount instruments: what we need
Send the full model code from the nameplate (for example 3051CD2A22A1AM5B4) and the tag if it is a replacement. For a new instrument, send the measuring range, process connection, wetted materials, output protocol and hazardous area approval.
Facts checked against Emerson's Rosemount history and published company histories, October 2026.
Browse Rosemount products by category: Pressure Instrumentation, Temperature Instrumentation, Level Transmitter, Liquid Analysis Sensors, Flowmeters.
FAQ
Questions about the Rosemount 8711-M/L Wafer Magnetic Flow Sensor
Answers from our engineering team on installation, compatibility and integration.
01What is the Rosemount 8711-M/L?
It is the wafer-style magnetic flow sensor of the Rosemount 8700M platform for line sizes from 1.5 to 8 in., installed between pipe flanges with alignment spacers.
02What liners and electrodes are offered?
Liners are PTFE, ETFE and, on the smallest sizes, PFA. Electrodes are 316L stainless steel, Alloy 276, tantalum, platinum-iridium or titanium.
03What is the 8711 temperature limit?
ETFE lining is rated to 149 degrees C and PTFE lining to 177 degrees C, with an ambient limit of 60 degrees C.
04Which transmitters does it work with?
The 8711-M/L is interchangeable with the Rosemount 8712EM wall-mount and 8732EM field-mount transmitters.
05Can the 8711 be submerged?
The remote-mount sensor is rated IP68 for continuous submergence, tested at 10 m for 48 hours, with approved cable glands and conduit plugs.
Reviews
There are no reviews yet.