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A heat detector is a fire alarm device designed to respond when the convected thermal energy of a fire increases the temperature of a heat sensitive element. The thermal mass and conductivity of the element regulate the rate flow of heat into the element. All heat detectors have this thermal lag. Heat detectors have two main classifications of ...
The Husky VMMD (Vehicle-Mounted Mine Detection) is a South African configurable counter-IED MRAP designed for route clearance and demining. It is designed to assist in the disposal of land mines and improvised explosive devices. The Husky was initially deployed in the 1970s.
The thermal conductivity detector ( TCD ), also known as a katharometer, is a bulk property detector and a chemical specific detector commonly used in gas chromatography. [1] This detector senses changes in the thermal conductivity of the column eluent and compares it to a reference flow of carrier gas. Since most compounds have a thermal ...
Thermopile laser sensors (Fig 1) are used for measuring laser power from a few μW to several W (see section 2.4). [2] The incoming radiation of the laser is converted into heat energy at the surface. [3] This heat input produces a temperature gradient across the sensor. Making use of the thermoelectric effect a voltage is generated by this ...
July 12, 2024 at 10:37 AM. Roy Rochlin/Getty Images. AT&T is reporting it was the victim of what is likely one of the largest data breaches of the year, as hackers obtained phone call and text ...
A passive infrared sensor ( PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors. PIR sensors are commonly used in security alarms and automatic lighting applications. PIR sensors detect general movement, but do not give ...
Also Friday, Newsom proclaimed a state of emergency for Butte and Tehama counties, as well as for Plumas County, home to the much smaller Gold Complex Fire, now at 3,007 acres with 50% containment ...
Linear heat detection (LHD) cable is essentially a two-core cable terminated by an end-of-line resistor (resistance varies with application). The two cores are separated by a polymer plastic, that is designed to melt at a specific temperature (commonly 68 °C for building applications [1] ), and without which causes the two cores to short .
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