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Sauermann launches six HVACR measuring instruments

BRUSSELS, Brussels, 07 February 2021: Sauermann’s new range of measuring instruments offers its 40 years of metrological expertise to distributors in the HVACR sector, the company said through a Press release.

Sauermann said it is offering six reliable and precise instruments designed to quickly check the functionality of HVACR systems. The new range of products covers a full spectrum of measurements, including temperature (dual input Si-TT3 and infrared Si-TI3 thermometers), humidity (thermo-hygrometer Si-HH3), pressure (digital differential pressure manometer Si-PM3), and air velocity (hotwire Si-VH3* and vane Si-VV3 thermo-anemometers), it said. Dependable, quick and easy measurements are done with just a few clicks, thanks to the instruments’ long-lasting batteries, it claimed.

The instruments are all equipped with a backlit display and a wireless pairing functionality, to be used with a brand-new mobile application available for iOS and Android devices (Si- HVACR Measurement Mobile App), the company said. Developed in-house at Sauermann, the app offers functionalities, such as the display of additional measurements (calculated parameters), and the recording of measurement campaigns that can be exported as PDF, XML or CSV reports (measurement tables and curves over time), it said. Further, Sauermann said it is offering reliable connected devices, with an integrated magnetic holder for handsfree measurements, with which a wide variety of measurements can be taken with ease and confidence.

Posifa introduces new air velocity sensors

San Jose, California, 14 May 2019: Posifa Technologies on May 9 introduced its new PAV1000 series of air velocity sensors for data center thermal management and HVAC applications, such as filter monitoring. Announcing this through a Press communiqué, the company said the devices, which measure air velocity at 7 m/s (PAV1005V) and 15 m/s (PAV1015V), offer extremely fast response times of 125 ms, typical in a compact, robust package.

According to the communiqué, 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.

PAV1000 series

According to the communiqué, air velocity data perfectly complements temperature information to provide the best insight into thermal efficiency. By identifying areas that require unusually high air flow to maintain stable temperatures, the communiqué said, layouts can be modified to reduce cooling demands for increased energy savings. In HVAC applications, the communiqué added, air velocity measurements can be used to determine when filters need to be replaced. This, the communiqué further added, ensures hardware is adequately protected during heavy use, while allowing customers with light usage requirements to benefit from extended change intervals.

According to the communiqué, 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 one per cent FS and accuracy of five per cent FS, the communiqué said. 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 communiqué added. 

According to the communiqué, 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, the communiqué said, operate over a -25 °C to +85 °C temperature range.

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