How to build your own air quality meter with a Raspberry Pi and CO2 sensor

A reliable indicator of the air quality in offices, classrooms, or living rooms is the CO2 content. In fresh air, the concentration of carbon dioxide is around 400 ppm. This stands for “parts per ...
IEEE

CMOS MEMS Thermal Flow Sensor With Enhanced Sensitivity for Heating, Ventilation, and Air Conditioning Application

Abstract: In this article, by using 0.35-μm two-polysilicon four-metal CMOS MEMS technology, a thermoresistive micro calorimetric flow (TMCF) sensor with two packaging designs is systematically ...
MDM

Ingersoll Rand Buying SPX Flow’s Air Treatment Unit for $525M

Ingersoll Rand originally wanted all of SPX Flow, but it appears it’s settling for a small chunk. On Oct. 6, global pumps and compressors maker Ingersoll Rand announced that it has reached a deal to ...
IEEE

Analysis of Flow Field and Heat Transfer in the Air Gap of High-Speed Permanent Magnet Synchronous Motor

Abstract: In order to deeply study the complex air flow and heat exchange in the air gap between the stator and rotor in a high-speed permanent magnet synchronous motor (HSPMSM). In this paper, based ...
Yahoo Finance

Delta Air Lines, Inc. (DAL)

This price reflects trading activity during the overnight session on the Blue Ocean ATS, available 8 PM to 4 AM ET, Sunday through Thursday, when regular markets are closed.