Current position > News detail
『Rosemount Magnetic Flow Meter 8711: Wafer Style Process Sensor Specs』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
Rosemount Magnetic Flow Meter 8711 Wafer Style Process Sensor Specs
Quick Answer
Quick Answer: The Rosemount 8711 wafer style process sensor covers DN15 to DN150 with PTFE or ETFE liners and 316L, Hastelloy, titanium or tantalum electrodes. It installs between flange sets and works with Rosemount 8712 or 8732 transmitters. Silver Automation Instruments supplies an equivalent wafer style electromagnetic flow meter with 4-20 mA HART, pulse output and ATEX options for the same size range.
Sensor Specs for the Rosemount 8711 Wafer Style
The Rosemount 8711 wafer style sensor is built for small and mid size industrial lines. Size options are DN15, DN25, DN40, DN50, DN80, DN100 and DN150. The wafer body sits between ASME Class 150 or Class 300 flanges. It also fits EN PN16 and PN40 flange patterns. This saves axial space in skids, pump modules and compact process rooms. Always check the pressure temperature curve for the liner and flange rating. For many water and chemical systems the practical limit is 40 bar at 25 °C.
Liner options include PTFE and ETFE. ETFE resists chemical attack and handles some abrasive streams better. Electrode choices include 316L stainless steel for clean water, Hastelloy C-276 for chemicals, titanium for seawater and brackish water, tantalum for strong acids and platinum for pastes or high solids. The minimum liquid conductivity is 5 µS/cm for standard operation. Low conductivity versions can measure down to 0.5 µS/cm. The meter does not work on fully deionized water with no conductivity.
Accuracy, Output and Transmitter Match
A Rosemount 8711 wafer sensor combined with a 8712E or 8732E transmitter gives 0.25 percent of rate accuracy above 1 m/s. At lower flow rates the error is about 0.5 percent of rate. Turndown from the 4-20 mA HART output is up to 100 to 1. In practice most engineers set the 20 mA point at 10 m/s for water and the 4 mA point at 0.1 m/s. The pulse output can drive a PLC totalizer directly. Silver Instruments offers a compatible electromagnetic flow meter with 4-20 mA, pulse, RS485 Modbus and optional HART. Accuracy is 0.5 percent of rate with an option for 0.2 percent on DN50 and larger lines.
Installation and Grounding
Wafer style sensors need grounding rings or grounding electrodes when the pipe is lined or plastic. This is a common miss on site. A paint manufacturer in Southeast Asia had unstable readings on a DN80 line because the field team skipped grounding rings. The fix took half a day. For bare conductive metal pipes the standard grounding strap can work. For plastic or lined pipe, order the grounding rings with the same material as the process fluid. The 8711 sensor is installed betw
Where Silver Instruments Fits
Silver Instruments supplies electromagnetic flow meters that replace the Rosemount 8711 wafer style sensor in many water, wastewater, chemical, food and beverage, and marine applications. The size range covers DN15 to DN150. Liner options include PTFE, PFA, hard rubber and EPDM. Electrode choices include 316L, Hastelloy, titanium, tantalum and platinum. Outputs include 4-20 mA, pulse, RS485 Modbus and HART. ATEX Zone 1 and Zone 2 approvals are available for hazardous areas. For desalination plant seawater flow measurement the titanium electrode option has worked on several sites in the Middle East. A customer in Vietnam replaced a failed magnetic flow meter on a chemical dosing line with a Silver Instruments unit in DN25 with PTFE liner and tantalum electrodes. The pipe size, temperature and pressure matched the original Rosemount 8711 installation.
Request a Quote with Process Data
Send us your pressure in bar, temperature in °C, pipe size in DN, flow range in m3/h or kg/h, and liquid conductivity in µS/cm. Our engineers will recommend a wafer style electromagnetic flow meter with the correct liner and electrode for your process. Contact Silver Instruments by phone at +86-135-1213-1526, WhatsApp at 86-135-12131526, or WeChat at +86 13512131526.
FAQ
Q: Can the Rosemount 8711 wafer sensor run on low conductivity liquids?
A: Standard operation needs 5 µS/cm minimum. Low conductivity versions can measure down to 0.5 µS/cm. Check the electrode surface and cable length.
Q: What makes a wafer style electromagnetic flow meter different from a flange style?
A: The wafer style sits between two flanges. It saves space and weight. Flange style meters have their own flanges and are simpler to align on large pipes.
Q: Which electrode is best for seawater?
A: Titanium works well for seawater and brackish water. Hastelloy C-276 works for many chemical streams. Tantalum suits strong acids. Do not choose 316L for continuous seawater service.
Q: Does Silver Instruments supply the transmitter with the sensor?
A: Yes. The sensor and transmitter ship as one calibrated unit. The converter can be compact or remote mount. Outputs include 4-20 mA HART, pulse, and RS485 Modbus.
Q: What information do you need for a quote?
A: Send pipe size DN, flow range, pressure in bar, temperature in °C, liquid type, conductivity in µS/cm, and hazardous area classification if any. We respond with a specific model price within 24 hours on business days.