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A residential heat detector. 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 ...
EN 54 part 6 Heat detectors; Rate-of-Rise point detectors without a static element; EN 54 part 8 Components of automatic fire detection systems. Specification for high temperature heat detectors; EN 54 part 9 Components of automatic fire detection systems. Methods of test of sensitivity to fire
Demonstration of tested specimen and IRNDT analysis results. IRNDT (infra-red nondestructive testing) method is suitable for detection and inspection of cracks, defects, cavities, voids and inhomogeneities in material, it is also possible to use the method for inspection of welded joints of metal and plastic parts, inspection of solar cells and solar panels, determination of internal structure ...
The transient hot wire method (THW) is a very popular, accurate and precise technique to measure the thermal conductivity of gases, liquids, [3] solids, [4] nanofluids [5] and refrigerants [6] in a wide temperature and pressure range.
Inset shows false color infrared thermograph of a roof on a sunny day; the white surfaces (colored blue in the thermograph) have been coated with an elastomer to reduce solar loading and have a surface temperature of approximately 60 °F (16 °C); the gray surfaces (colored red/white in the thermogram) are a standard asphalt (bitumen) coating and have a surface temperature of approximately 160 ...
A handheld thermal imaging camera. A thermal imaging camera consists of five components: an optic system, detector, amplifier, signal processing, and display. [1] Fire-service specific thermal imaging cameras incorporate these components in a heat-resistant, [2] ruggedized, and waterproof housing. [3]
Tubing inspection is generally limited to non-ferromagnetic tubing and is known as conventional eddy current testing. Conventional ECT is used for inspecting steam generator tubing in nuclear plants and heat exchangers tubing in power and petrochemical industries. The technique is very sensitive to detect and size pits.
In this method of cooling the heat is actively transferred to the environment. This is usually done by mounting a fan on the heat sink of a passively cooled detector or by pumping water through a channel system to cool the sensor. The preferred choice depends on the amount of heat to be dissipated and thus on the detector power.