Emerson has launched a new industrial-grade magnetic flow sensor designed to strengthen cooling reliability, improve efficiency and maximize uptime in data centers as demand for digital infrastructure continues to surge.
The Rosemount 8795 Magnetic Flow Sensor is purpose-built for hydronic cooling systems, delivering accurate, repeatable flow measurements in mission-critical environments. The solution is designed to simplify equipment selection, installation and commissioning while helping data center operators maintain reliable cooling performance.
"As data centers expand to support growing digital infrastructure demands, the Rosemount 8795 applies decades of Emerson flow measurement expertise to help operators improve reliability, simplify deployment, and maximize cooling system performance in mission-critical applications," said Bob Halgren, vice president magnetic and vortex flow products with Emerson’s measurement instrumentation business.
A key feature of the Rosemount 8795 is its ability to deliver accurate measurements in installations where limited space makes conventional straight-pipe requirements difficult to meet — a common challenge in data center cooling infrastructure.
The sensor can run Emerson's proprietary Short Run Installation software, enabling 0.5% accuracy with zero upstream pipe diameters (0D), depending on the upstream flow disturbance and the distance from the electrodes. The feature is activated during setup when the sensor is paired with compatible Rosemount Magnetic Flow Transmitters.
Emerson says this is an industry first, distinguishing the solution from competing magnetic flow meters that require multiple electrodes or a reduced-bore design to achieve similar short-run installation benefits.
For installations with upstream and downstream straight-pipe runs of 5D/2D or more, the sensor can pair with compatible Rosemount transmitters to deliver flow measurement accuracy of 0.2% ± 2 mm/s, supporting monitoring and control of critical cooling loops.
Built-in diagnostics and verification capabilities also help operators and system integrators reduce commissioning risks and maintain confidence in long-term system performance.
Optimized for chilled water and water-glycol systems, the Rosemount 8795 supports common data center pipe sizes ranging from 2 to 18 inches. Its 0.1% repeatability is designed to ensure consistent flow data for building management systems (BMS) and data center infrastructure management (DCIM) platforms.
The measurements can support calculations of water, cooling and power usage effectiveness — including WUE, CUE and PUE — key metrics for tracking resource consumption and operational efficiency.
The sensor's polytetrafluoroethylene (PTFE) liner and stainless-steel electrodes are tailored to thermal management applications in primary cooling loops, supporting dependable operation in closed-loop systems.
The Rosemount 8795 is engineered to meet common building management system cooling specifications while accommodating different site requirements. Its features include a no-moving-parts design, a minimum conductivity requirement of 5 µS/cm, dual 4–20 mA outputs plus Modbus communications, universal AC or DC power, and support for integral or remote transmitter mounting.
Combined with Short Run Installation software, these capabilities are intended to help data center operators standardize on a single flow measurement solution across hydronic cooling applications.
Emerson's global supply chain is also positioned to support the shorter lead times and deployment scale demanded by expanding data center infrastructure.
The launch expands Emerson's existing magnetic flow meter portfolio with enhanced software capabilities and simplified ordering, strengthening its instrumentation offering for data center customers.
