Rosemount High-Signal Magnetic Flowmeter System
Optimized performance in the most difficult slurry applications
The 8707 High-Signal Sensor, used in conjunction with the 8712H High-Signal Transmitter, forms the Rosemount High-Signal Magnetic Flowmeter System. This system provides stable flow measurement in the most difficult high-noise applications while maintaining the benefits of DC technology. The increased signal strength of the Rosemount high-signal system, coupled with advanced signal processing and superior filtering techniques, provides the solution to demanding flow measurement applications.
The 8712H utilizes a convenient well mount, dual compartment enclosure with the world’s most intuitive, easy to use Local Operator Interface (LOI).
High-signal System reduces process variability by providing the most stable flow output available.
Ideal solution for the noisiest applications found in the pulp & paper and mining industries.
Features & Benefits
Faster start-up with easy to use Local Operator Interface (LOI)
Dual calibration option to reduce sensor inventory
World’s best stability in the most difficult slurry applications
-Paper Mill Basis Weight flow
-Paper Mill Black Liquor flow
-Paper Mill stock flow
-Mining slurries with high solids concentration (> 30%)
Specifications
| Accuracy | Up to ±0.25% of volumetric flow rate accuracy over 13:1 flow turndowns, ±0.5% over 40:1 flow turndown |
| Diagnostics | Transmitter Faults, Sensor Faults, Empty Pipe Detection |
| Compatibility |
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| Power Supply | 115 V AC ±10%, 50-60 Hz |
| Power Consumption | 300 watts maximum |
Availability
With a wide range of liner and electrode materials available, the Rosemount 8700 Series Magnetic Flowmeter family is suitable for virtually any conductive liquid application. Rosemount Magnetic Flowmeters offer the benefit of measuring flow in a package unaffected by density, temperature, pressure, and viscosity change.
Step 1: Flow Sensor Type
| Type | Application Notes | Accuracy Option | Line Sizes | Coil Drive Power | |
| 8705 | Standard process design | 0.25% Standard 0.15% High | 15 - 900 mm 0.5 - 36 inch | Pulsed DC |
| 8711 | Compact light-weight | 0.25% Standard 0.15% High | 4 - 200 mm 0.15 - 8 inch | Pulsed DC |
| 8721 | Designed for food & beverage and life science, 3-A and EHEDG | 0.5% Standard 0.25% High | 15-100 mm 0.5 - 4 inch | Pulsed DC |
| 8707 | Best in P&P, M&M slurry flows, and noisy applications | 0.5% Standard 0.25% High | 80 - 900 mm 3 - 36 inch | High-Signal Pulsed DC |
| Liner | Notes | Temp Limits | Type and Line Sizes | ||
 | PFA | BEST FLUOROPOLYMER Excellent resistance to chemicals and abrasion. Suitable for any application. | -20 to 350°F (-29 to 177°C | Flange 15 - 350 mm 0.5 - 14 inch | Wafer 4 - 8 mm 0.15 - 0.3 inch |
 | PTFE | BETTER FLUOROPOLYMER More cost effective than PFA. Excellent chemical resistance, but less abrasion resistance than PFA. | -20 to 350°F (-29 to 177°C | Flanged 15 - 900 mm 0.5 - 36 inch | Wafer 15 - 200 mm 0.5 - 8 inch |
 | ETFE | GOOD FLUOROPOLYMER Similar chemical and abrasion resistance to PTFE, but a lower maxium temperature an more expensive. | -20 to 300°F (-29 to 149°C) | Flanged 15 - 400 mm 0.5 - 16 inch | Wafer 15 - 200 mm 0.5 - 8 inch |
 | Polyurethane | Typically applied to clean water (no chemicals). Abrasion resistant to slurries with small particles. | 0 to 140°F (-18 to 60°C) | Flanged 15 - 900 mm 0.5 - 36 inch | |
 | Neoprene | Typically applied to water and sea water. Abrasion resistant to slurries with small particles. | 0 to 185°F (-18 to 85°C) | Flanged 80 - 1800 mm* 1.5 - 72 inch | |
 | Linatex | Typically applied to mining slurries, abrasion resistant to larger debris. | 0 to 158°F (-18 to 70°C) | Flanged 80 - 900 mm 1.5 - 36 inch | |
| Electrode Type | Application Notes | |
 | Button | Standard electrode design. Use for most applications, especially where abrasion is a concern. Has fair resistance to coating which can be improved by properly sizing sensor. |
 | Bullet-nose | Use where coating is a concern and no solids are present. Bullet-nose electrode should not be used in abrasive or slurry applications as the particles will result in increased process noise on the electrodes. |
| Electrode Material | Application Notes | |
| 316L SST | Standard electrode material. Compatible with most low concentration water based applications. Avoid using stainless in higher concentration acid applications. | |
| Nickel Alloy 276 | Use in medium to high concentration acids where SST is not acceptable. Use in applications with high chloride concentrations, such as sea water. | |
| Platinum (80% Platinum, 20% Iridium) | Ideal for liquor applications found in pulp and paper industry. Also ideal as a spare electrode option to cover nearly every application in a plant. Compatible with nearly every process fluid. | |
| Tantalum | Ideal for high concentration acid flows such as hydrochloric and hydrofluoric acids. | |
| Titanium | Ideal for high concentration caustic (base) applications such as sodium and potassium hydroxides. | |
| Type | Notes | Accuracy Option | Power Supply | User Interface Output Protocol LOI | |
| 8732 | Integral or remote mounting | 0.25% Std 0.15% High | Global AC/DC | HART®, Foundation™ fieldbus optical switch LOI or display only |
| 8712 | Remote wall | 0.25% Std 0.15% High | Global AC/DC | HART Dedicated button LOI |
| 8712 High Signal | Remote wall. Compatible only with 8707 flowtube | 0.5% Std 0.25% | 115V AC | HART Dedicated button LOI |
| Type | Notes | Availability | |
 | Standard Diagnostics | Transmitter hardware fault; transmitter software fault; sensor coil fault; empty pipe | With every E-Series transmitter |
| D1 | High accuracy option (0.15%) | 8732 and 8712 | |
| AX | Enhanced DI ⁄ DO capability | 8732 and 8712 | |
| HART ⁄ FF | |||
| DA1 ⁄ D01 | Diagnostics suite includes: ground and wiring fault detection, high process noise detection. | 8732 and 8712 | |
| DA2 ⁄ D02 | Diagnostic suite includes: 8714i internal meter verification | 8732 and 8712 | |
