Emerson has launched a new magnetic flow sensor meant to help data centers keep their water-based cooling systems running reliably. The product, the Rosemount 8795, measures how much liquid moves through hydronic cooling loops.
The company said the sensor was designed to make choosing, installing and starting up flow meters simpler for data center operators.
Built for tight spaces
Cooling equipment in data centers is often packed into spaces without long straight runs of pipe, which flow meters usually need for accurate readings. Paired with compatible Rosemount transmitters such as the Rosemount 9732, the 8795 can run Emerson's Short Run Installation software, which the company said delivers 0.5% accuracy with no straight pipe ahead of the sensor, depending on how disturbed the incoming flow is and how far it is from the electrodes.
Emerson called that an industry first. It said rival magnetic meters need extra electrodes or a narrowed bore to get similar results in short installations. Where there are at least five pipe diameters of straight pipe upstream and two downstream, Emerson said the sensor and its transmitters can reach 0.2% accuracy, plus or minus 2 millimeters per second.
Specifications
The sensor is meant for systems running chilled water or a water and glycol mix and fits pipes 2 to 18 inches across. Emerson lists its repeatability at 0.1%, steady enough, the company said, to feed building management and data center infrastructure management software. Operators can use the readings to work out the efficiency ratios known as WUE, CUE and PUE, which track water, cooling and power use.
