Itâs now better suited for modern web browsers and mobile devices. The discussion board is reopen and weâve reinstated the ability to post comments. Discussions provide a âthreadâ of related information and are a great way to find genealogical information. Comments may be added to photos, cemeteries, cemetery records, or a general area.
The carbon dioxide gas sensor measures gaseous carbon dioxide levels by detecting the quantity of IR radiation absorbed by carbon dioxide molecules. The sensor employs a hot metal filament that acts as an IR source to generate IR radiation. The IR source is located at one end of a sensor tube, and another end is provided with an IR sensor.
Infrared proximity sensor. A proximity sensor is a sensor able to detect the presence of nearby objects without any physical contact. A proximity sensor often emits an electromagnetic field or a beam of electromagnetic radiation (infrared, for instance), and looks for changes in the field or return signal. The object being sensed is often referred to as the proximity sensor's target.