A New Perspective on Magnetic Field Sensing
Magnetic sensors differ from most other detectors in that they do not
directly measure the physical property of interest. Devices that monitor
properties such as temperature, pressure, strain, or flow provide an output
that directly reports the desired parameter (see Figure 1). Magnetic sensors,
on the other hand, detect changes, or disturbances, in magnetic fields that
have been created or modified, and from them derive information on properties
such as direction, presence, rotation, angle, or electrical currents. The
output signal of these sensors requires some signal processing for translation
into the desired parameter. Although magnetic detectors are somewhat more
difficult to use, they do provide accurate and reliable data — without physical
contact. Read more..
directly measure the physical property of interest. Devices that monitor
properties such as temperature, pressure, strain, or flow provide an output
that directly reports the desired parameter (see Figure 1). Magnetic sensors,
on the other hand, detect changes, or disturbances, in magnetic fields that
have been created or modified, and from them derive information on properties
such as direction, presence, rotation, angle, or electrical currents. The
output signal of these sensors requires some signal processing for translation
into the desired parameter. Although magnetic detectors are somewhat more
difficult to use, they do provide accurate and reliable data — without physical
contact. Read more..
Measuring the electromagnetic spectrum
You actually know more about it than you may think! The electromagnetic (EM) spectrum is just a name that scientists give a bunch of types of radiation when they want to talk about them as a group. Radiation is energy that travels and spreads out as it goes-- visible light that comes from a lamp in your house and radio waves that come from a radio station are two types of electromagnetic radiation. Other examples of EM radiation are microwaves, infrared and ultraviolet light, X-rays and gamma-rays. Hotter, more energetic objects and events create higher energy radiation than cool objects. Only extremely hot objects or particles moving at very high velocities can create high-energy radiation like X-rays and gamma-rays. Read more...
Gas sensors
Gas sensors based on nickel oxide come in various types. The gas sensors can be either optical or electrical. The principle of most gas sensors is that a reaction of the sensor with the gas causes changes in the surface of the sensor, which results in changes of the optical and/or electrical properties. Read more..
Gas Detection Principles
Honeywell Analytics is the World’s leading manufacturer of flammable, toxic and oxygen detection systems, bringing together nearly 200 years of collective experience in the design and creation of some of the most innovative products in gas detection. Suitable for industrial, commercial and domestic applications where people can be exposed to flammable, toxic or oxygen deficiency gas hazards, Honeywell Analytics’ gas detection solutions are available in a variety of fixed and portable ranges.Read more..
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