『Emerson Magnetic Flow Meter 8705 Specifications: Flanged Sensor Lining and Electrode Options』Related information(v cone flow meter|rotary gas meter|gallon meter|gear meter|metal tube rotameter|glass tube rotameter|nutating disk meter|transit time ultrasonic flow meter|wedge flow meter|pd meters|hydraulic flow meter|ultrasonic water flow meter|water flow meter|air flow meter|magnetic water flow meter|oxygen flow meter|gas flow meter|argon flow meter|air velocity meter|gasoline flow meter|fuel flow meter|ultrasonic water meter|digital water meter|nitrogen flow meter|solid flow meter|Oxygen tank flow meter|digital water flow meter|diesel fuel flow meter|steam flow meter|02 flow meter|compressed air flow meter|oil flow meter|liquid flow meter)
Emerson Magnetic Flow Meter 8705 Specifications: Flanged Sensor Lining and Electrode Options
Quick Answer
The Emerson Rosemount 8705 flanged magnetic flow meter sensor supports line sizes from DN15 to DN900. The main lining choices are PTFE, PFA, polyurethane, neoprene, and hard rubber. The main electrode materials are 316L stainless steel, Hastelloy C-276, titanium, tantalum, and nickel. Your process fluid, temperature, pressure, and conductivity set the final selection.
Why Lining Choice Comes First
Most engineers start with the liner because the liner touches the process fluid. A wrong liner fails faster than any other component. We have seen this on customer sites in Vietnam and the Philippines. The liner protects the sensor body from corrosion and abrasion. It also sets the maximum operating temperature of the flow meter.
PTFE and PFA are fluoropolymer liners. They resist strong acids, caustics, solvents, and high temperatures. PTFE works well up to 150 °C in many process lines. PFA extends the upper range to about 177 °C and has better chemical resistance in some applications. Use these liners for chemical dosing, acid transfer, and corrosive wastewater.
Polyurethane handles abrasive fluids. Slurries, mining tailings, and water with sand wear out fluoropolymers faster. Polyurethane has a lower temperature limit, usually around 60 °C, but it absorbs particle impact much better. We often quote polyurethane liners for dredging and mineral processing projects in Australia and Indonesia.
Neoprene and hard rubber suit water and wastewater. They cost less than fluoropolymers. They work well from 0 °C to about 80 °C. Use them for raw water, sewage, sludge, and cooling water lines. They do not handle strong solvents or aggressive acids.
Electrode Options and Fluid Compatibility
The electrode is the small metal surface that contacts the fluid. Six common materials cover most applications. 316L stainless steel works for water, wastewater, and mild chemicals. It is the default choice for many plants because it is low cost and widely available.
Hastelloy C-276 suits oxidizing acids, seawater, and chemical waste streams. It resists pitting and crevice corrosion better than 316L. Titanium handles seawater, brine, and high chloride water. Desalination plants and marine cooling systems often need titanium electrodes. Tantalum is the premium choice for hydrochloric acid and strong acids. Nickel works for hot concentrated alkalis such as caustic soda.
Do not pick the electrode material only by price. A titanium electrode may cost more up front. In seawater service it can last years longer than 316L. A plant in the Middle East replaced 316L electrodes every few months because of chloride attack. Titanium solved the problem.
Flanged Sensor Sizes and Pressure Ratings
The 8705 flanged sensor covers DN15 to DN900. Small line sizes suit chemical injection and pilot plants. Large line sizes fit water distribution and raw sewage pump stations. Flanged connections match ASME, EN, and JIS standards depending on the factory configuration.
Pressu
Selection Process in Practice
Start with three data points. What is the fluid? What is the temperature? What is the pressure? Then check the liner. After that check the electrode. Finally check the pipe size and flow range. This order prevents most mistakes.
For example, a paint manufacturer in Southeast Asia needed a flow meter for solvent based paint. The fluid was corrosive and had a low conductivity. We quoted a PFA liner with Hastelloy C-276 electrodes and a remote transmitter. The line size was DN40. The meter ran without liner failure for three years. Here is the thing. Many users focus only on the transmitter accuracy. The sensor liner and electrode options determine how long the meter survives in the process.
Magnetic Flow Meter Replacement Options
Silver Automation Instruments supplies industrial magnetic flow meters with similar flange sizes, liners, and electrode materials. We ship to water plants, chemical sites, food and beverage factories, and marine operators in Southeast Asia, Oceania, Latin America, Africa, and the Middle East. If your Emerson 8705 sensor is at end of life or your project needs a budget friendly flange meter, send us your process data.
Tell us your pipe size (DN), flow range, fluid name, conductivity (µS/cm), temperature (°C), and pressure (bar). We will recommend a lining and electrode combination and send a quotation. Contact Silver Automation Instruments. Tel: +86-25-68650347. WhatsApp: +86-25-52155837. WeChat: +86 15365082610.
FAQ
Which liner is best for abrasive slurry?
Polyurethane is usually the best liner for abrasive slurry. It absorbs particle impact better than PTFE and PFA. Keep the fluid temperature below 60 °C and verify chemical compatibility.
What is the maximum temperature for an Emerson 8705 sensor?
PFA liners typically allow operation up to 177 °C. PTFE liners often go to 150 °C. The final limit also depends on the flange rating and electrode material.
Can the 8705 measure low conductivity fluids?
Magnetic flow meters need a minimum fluid conductivity. Many Emerson 8705 installations work above 5 µS/cm. Fluids such as deionized water or certain oils may not produce a stable measurement.
Which electrode material is best for seawater?
Titanium and Hastelloy C-276 both work well in seawater. Titanium is common for desalination and marine cooling. Hastelloy C-276 offers better all round chemical resistance in mixed streams.
How do I get a quotation for a similar flange magnetic flow meter?
Send Silver Automation Instruments your pipe size, flow range, fluid, conductivity, temperature, and pressure. We will select a sensor liner and electrode combination and provide pricing. Tel: +86-25-68650347. WhatsApp: +86-25-52155837. WeChat: +86 15365082610.
Hot News
Related AD
