NEW AIR VELOCITY SENSORS FOR DATA CENTER THERMAL MANAGEMENT

The PAV1000 series was designed as an economical, high-performance air velocity sensor for thermal management and filter monitoring in even the most space-constrained locations, such as rack enclosures with air cooling in data centers . Unlike thermistor-based solutions, the Posifa MEMS sensor core is minimally affected by ambient temperature changes and provides instant real-time feedback on proper air flow at critical locations .

Air velocity data perfect ly complement s temperature information to provide the best insight into thermal efficiency. By i dentifying areas that require unusually high air flow to maintain stable temperatures , layouts can be modified to reduce cooling demands f or increased energy savings. In HVAC applications , air velocity measurements can be used to determine when filter s need to be replace d. This ensures hardware is adequately protected during heavy use , while allowing customers with light usage requirements to benefit from extended change intervals.

The devices feature Posifa’s third-generation thermal flow die, which uses a pair of thermopiles to detect changes in temperature gradient caused by mass flow. The result is excellent repeatability of 1 % FS and accuracy of 5 % FS. The solid-state thermal isolation structure on the sensor die eliminates the need for a surface cavity or fragile membrane used in competing technologies, making the sensor resistant to clogging and pressure shock.

The PAV1000 series offers an output voltage range from 0 VDC to 4.5 VDC, supply voltage from 5 VDC to 5.5 VDC, and supply current of 20 mA. The devices operate over a -25 ° C to +85 ° C temperature range.

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