Emerson Introduces Rosemount 8795 Magnetic Flow Sensor to Improve Data Center Cooling Reliability, Efficiency and Uptime
Global automation leader Emerson has announced the launch of its new Rosemount™ 8795 Magnetic Flow Sensor, an industrial-grade flow measurement solution specifically designed for hydronic cooling applications in data centers. The new sensor is engineered to deliver accurate, repeatable flow measurements that support reliable cooling performance, operational efficiency and uptime in mission-critical data center environments.
As demand for digital infrastructure continues to increase, data center operators face growing pressure to maintain dependable cooling systems while managing energy consumption, water usage and operational costs. The expansion of cloud computing, artificial intelligence and other digital services has increased the importance of reliable thermal management systems capable of operating continuously under demanding conditions. Emerson’s Rosemount 8795 addresses these requirements by providing a purpose-built flow measurement solution that simplifies equipment selection, installation and commissioning.
Designed for chilled water and water-glycol cooling loops, the new flow sensor combines industrial-grade construction with specialized software capabilities and flexible installation options. It is intended to help data center operators and system integrators monitor cooling system performance more effectively while supporting the reliable operation of critical infrastructure.
Addressing Data Center Cooling Challenges
Data centers depend on effective cooling systems to maintain suitable operating temperatures for servers, networking equipment and other essential infrastructure. Hydronic cooling systems circulate chilled water or water-glycol mixtures to remove heat and maintain stable operating conditions. Accurate flow measurement is essential for monitoring these systems, supporting effective control and identifying potential performance issues.
However, data center environments often present installation challenges because equipment rooms and cooling infrastructure can have limited space. Conventional flow measurement installations may require specific lengths of straight piping upstream and downstream of a sensor to achieve the required measurement accuracy. Meeting these requirements can be difficult in compact or complex cooling layouts.
The Rosemount 8795 has been designed to address these challenges by offering measurement capabilities for installations with limited straight-pipe lengths. Its specialized software helps maintain measurement accuracy in situations where conventional installation requirements cannot be met, giving engineers greater flexibility when designing or upgrading cooling systems.
Bob Halgren, vice president of magnetic and vortex flow products within Emerson’s measurement instrumentation business, highlighted the importance of the new solution as data center infrastructure expands.
“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,” Halgren said.
The new sensor extends Emerson’s flow measurement expertise into a specialized application where accuracy, installation flexibility and operational reliability are particularly important.
Specialized Software Enables Short-Run Installations
One of the key features of the Rosemount 8795 is its ability to support accurate flow measurement in installations with limited upstream straight-pipe lengths. The sensor can host Emerson’s proprietary Short Run Installation software, which is designed for situations where space constraints prevent conventional piping arrangements.
When the sensor is paired with compatible Rosemount Magnetic Flow Transmitters, the software is implemented during setup to support the required measurement performance. According to Emerson, the solution can deliver 0.5% accuracy at zero diameters (0D) of straight pipe runs, depending on the upstream flow disturbance and its distance from the electrodes.
This capability is particularly relevant for data centers, where piping layouts may need to accommodate numerous cooling components within restricted spaces. By reducing the dependence on long straight-pipe sections, the technology can provide greater flexibility for engineers and integrators during system design and installation.
Emerson describes this capability as an industry first, noting that competing magnetic flow meters generally require either a specially designed sensor with multiple electrodes or a reduced-bore configuration to provide comparable short-run installation benefits.
The software-based approach is intended to simplify deployment while preserving the flow measurement accuracy needed for reliable cooling system monitoring. It can also help reduce installation complexity in projects where physical space, existing infrastructure or piping configurations limit available options.
High Accuracy for Critical Cooling Loops
For installations with longer upstream and downstream straight-pipe runs of 5D upstream and 2D downstream (5D/2D) or more, the Rosemount 8795 can be paired with compatible Rosemount transmitters to provide flow measurement accuracy of 0.2% ± 2 mm/s.
This level of accuracy supports reliable monitoring and control of critical cooling loops. Accurate flow data helps operators assess whether cooling systems are delivering the required flow rates and supports the management of thermal conditions across data center facilities.
The sensor is designed to provide 0.1% repeatability, helping ensure consistent measurements over time. Reliable and repeatable flow data can be transmitted to building management systems (BMS) and data center infrastructure management (DCIM) platforms, where it can contribute to operational monitoring and performance calculations.
The resulting data can support calculations related to water usage effectiveness (WUE), carbon usage effectiveness (CUE) and power usage effectiveness (PUE). These indicators are used by data center operators to evaluate aspects of water consumption, carbon impact and energy efficiency.
By providing consistent flow measurements, the Rosemount 8795 can help operators obtain dependable information about cooling system performance and make better-informed decisions about system control and resource management.
Designed for Chilled Water and Water-Glycol Applications
The Rosemount 8795 has been optimized for chilled water and water-glycol cooling loops commonly used in data center thermal management systems. It supports common data center piping sizes ranging from 2 to 18 inches, allowing the sensor to serve a range of hydronic cooling applications.
Its construction includes a polytetrafluoroethylene (PTFE) liner and stainless-steel electrodes selected for these thermal management applications. These components are intended to provide dependable performance in primary cooling loops and closed-loop cooling systems.
The sensor also features a design without moving parts. This configuration supports measurement reliability and eliminates the need to maintain mechanical moving components within the flow measurement device.
The combination of application-specific materials, repeatable measurement performance and industrial-grade construction is intended to help data center operators maintain reliable cooling operations. By providing accurate information about flow conditions, the sensor can support system monitoring and control while helping operators maintain confidence in their cooling infrastructure.
Flexible Connectivity and Simplified Installation
In addition to its measurement capabilities, the Rosemount 8795 incorporates functions designed to align with common building management system cooling specifications.
The sensor supports a minimum fluid conductivity of 5 µS/cm and offers dual 4–20 mA plus Modbus outputs. These features provide options for communicating flow information to control and monitoring systems used across data center facilities.
The device also supports universal AC or DC power, giving installers flexibility when integrating it into different electrical configurations. Compatible Rosemount transmitters can be mounted integrally or remotely, allowing the installation arrangement to be adapted to the needs of individual projects.
The Short Run Installation software further expands the sensor’s installation flexibility by addressing situations where sufficient straight-pipe lengths are unavailable.
Together, these features are intended to simplify equipment specification and standardize flow measurement across a data center site. Instead of relying on different solutions for different hydronic installation conditions, operators and system integrators can use a common sensor platform across a wider range of cooling applications.
Built-In Diagnostics Support Commissioning and Reliability
Commissioning is an important stage in data center development because cooling systems must be configured and verified before they support critical computing operations. Problems identified during commissioning can cause delays, require additional work and increase project costs.
The Rosemount 8795 works with compatible Rosemount transmitters that provide built-in diagnostics and verification capabilities. These functions are designed to help data center operators and integrators reduce commissioning risk and maintain confidence in ongoing system performance.
Access to reliable measurement information and diagnostic capabilities can help technical teams verify installation performance and support the continued monitoring of cooling systems after commissioning. This is particularly important in facilities where cooling reliability is closely connected to the availability of essential digital services.
By combining measurement accuracy, installation flexibility and diagnostic support, Emerson aims to help customers simplify the deployment of flow measurement equipment and maintain reliable cooling operations over time.
Strengthening Emerson’s Data Center Instrumentation Portfolio
The Rosemount 8795 expands the capabilities of Emerson’s existing magnetic flow meter portfolio by adding specialized software functions and simplified ordering for data center applications.
The product is designed to meet common building management system cooling specifications while providing flexibility for different site conditions and installation requirements. Its combination of standard connectivity, flexible transmitter mounting, universal power options and short-run measurement capabilities is intended to support a more standardized approach to hydronic flow measurement.
Emerson also highlights its global supply chain as a factor in supporting the shorter lead times and supply requirements associated with data center projects. As operators expand facilities and build additional capacity, dependable access to instrumentation can be important for keeping installation and commissioning activities on schedule.
The introduction of the Rosemount 8795 reflects Emerson’s focus on providing automation and measurement technologies for increasingly demanding digital infrastructure applications.
As data centers continue to expand, reliable cooling performance and accurate operational data will remain essential to maintaining uptime and managing energy and water consumption. With the Rosemount 8795 Magnetic Flow Sensor, Emerson is offering a purpose-built flow measurement solution designed to address the installation, accuracy and reliability requirements of modern hydronic cooling systems.
