8705W Digital Water Meter – Electromagnetic Flow Measurement Solution for Municipal and Industrial Applications
The Rosemount 8705W Digital Water Meter is a high-performance electromagnetic flowmeter engineered for accurate and reliable water measurement in municipal and industrial applications. Designed with a robust flanged sensor and advanced digital signal processing, it delivers precise flow data for potable water, wastewater, and process water systems. With seamless integration into digital control networks through HART® and other communication protocols, the 8705W ensures efficient monitoring, reduced maintenance, and long-term operational stability.
| Feature / Parameter |
Rosemount 8705W |
Rosemount 8750W |
| Product Type |
Flanged Electromagnetic Flowmeter Sensor |
Complete Electromagnetic Flowmeter System (sensor + transmitter) |
| Primary Application |
General conductive liquid measurement (water, wastewater, process fluids) |
Specifically optimized for municipal water and wastewater |
| Design |
Rugged flanged sensor, epoxy-lined or PTFE-lined options |
All-welded coil housing, sealed against moisture (IP68 available) |
| Transmitter Compatibility |
Requires pairing with Rosemount 8732, 8712, or 8721 transmitters |
Integrated with a dedicated transmitter (integral or remote) |
| Accuracy |
±0.25% of rate (with compatible transmitter) |
±0.25% of the rate |
| Diagnostics |
Basic diagnostics via transmitter |
Advanced diagnostics + Smart Meter Verification |
| Certifications |
General industrial certifications |
Drinking water certifications available (NSF/ANSI, etc.) |
| Installation |
Broad industrial use, flexible transmitter pairing |
Tailored for water utilities, simplified installation |
| Best Fit |
Industrial plants, mixed liquid applications |
Municipal water distribution, wastewater treatment |
Applications
The Rosemount 8705W Digital Water Meter is engineered for accurate and reliable flow measurement across a wide range of water-related processes. Typical applications include:
- Municipal Water Supply – Precise monitoring of potable water distribution networks to ensure efficiency and regulatory compliance.
- Wastewater Treatment – Reliable flow measurement in influent, effluent, and sludge lines, even under challenging conditions.
- Industrial Utilities – Monitoring process water, cooling water, and boiler feedwater in power plants, chemical facilities, and manufacturing sites.
- Irrigation Systems – Accurate measurement of water usage in large-scale agricultural and irrigation networks.
- District Metering Areas (DMA) – Supporting leak detection and water balance analysis in urban water management.
- OEM and Skid Systems – Integration into packaged water treatment and industrial process skids requiring digital communication and robust performance.
Frequently Asked Questions (FAQ)
Q1: What type of technology does the Rosemount 8705W use?
A1: The 8705W is an electromagnetic flowmeter sensor, designed to measure the flow of conductive liquids such as water, wastewater, and process fluids.
Q2: Can the 8705W be used as a standalone water meter?
A2: No. The 8705W is a sensor and must be paired with a compatible transmitter (such as the Rosemount 8732 or 8712) to provide digital output, diagnostics, and communication.
Q3: What industries typically use the 8705W?
A3: It is widely applied in municipal water supply, wastewater treatment, power generation, chemical processing, and industrial utilities.
Q4: What is the accuracy of the 8705W?
A4: When paired with a compatible transmitter, the 8705W provides accuracy up to ±0.25% of flow rate, ensuring reliable measurement for critical applications.
Q5: What are the installation options?
A5: The 8705W is a flanged sensor available in a wide range of line sizes. It can be installed in horizontal or vertical pipelines, provided the pipe is always full of liquid.
Q6: How does the 8705W differ from the 8750W?
A6: The 8705W is a sensor only, requiring a transmitter, while the 8750W is a complete flowmeter system optimized for municipal water and wastewater applications, with advanced diagnostics and certifications.
Q7: What communication protocols are supported?
A7: Through its transmitter, the 8705W supports HART®, FOUNDATION™ Fieldbus, and Modbus protocols for seamless integration into digital control systems.
Q8: Is the 8705W suitable for use with potable water?
A8: Yes, with the appropriate liner and electrode materials, the 8705W can be used for drinking water measurement in compliance with industry standards.
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