SFM3019: Precision Flow Sensor for Advanced Respiratory Devices

Parts and Materials Two single‑turn, linear‑taper potentiometers, 5 kΩ each (Radio Shack catalog #271‑1714) One single‑turn, linear‑taper potentiometer, 50 kΩ (Radio Shack catalog #271‑1716) Plastic or metal mounting box Three “banana” jack‑style binding posts, or equivalent terminal hardware (Radi

The core mechanism of a miniature sensor on a chip incorporates two layers of silicon that overlay each other separated by the space of 270 nanometers — about 0.005 the width of a human hair. They carry a minute voltage. Vibrations from bodily motions and sounds put part of the chip in flux, making

Detection of carbon dioxide (CO2) is very important for environmental, health, safety, and space applications. Carbon dioxide is a harmful pollutant at higher concentrations due to its ability to displace oxygen in large concentrations. Current commercial sensors for CO2 have issues and shortcomings

Scientists have developed a highly sensitive and accurate nitrogen dioxide (NO2) sensor that has lifesaving potential applications in domestic, public, and industrial settings. Long-term exposure to NO2 — a major air pollutant that originates from combustion engines and industrial processes — can ca