Category Archives: Sensors

Sensor Technologies for Air Quality Monitoring

Although air is all around us, we breathe it in every minute, and our lives depend on it, yet we pay very little attention to the quality of air, unless when facing a problem. Whether it is indoors or outdoors, poor air quality can affect our health and well-being significantly. Two levels of air pollution measurement are significant here. One is the presence of small PM2.5 or Particulate Matters measuring less than 2.5 microns in size—one micron being one-micrometer equal to one-millionth Read more [...]

Pyroelectric Sensors

Certain crystalline substances are electrically polarized, and a change in heat causes them to change their polarization proportionally. The crystal manifests its change in polarization by temporarily generating a detectable voltage across itself. Scientists call the behavior of such crystals the Pyroelectric effect and the phenomenon as Pyroelectricity. Sensors made of such crystals are pyroelectric sensors and they are infrared sensors with a host of applications with the underlying technology Read more [...]

Coreless Magnetic Current Sensors

Modern industrial drives require accurate current measurement for effectively regulating the torque and ensuring maximization of operational efficiency levels. For achieving necessary efficiency levels along with the safety requirements, the measurement methodology must achieve a high degree of linearity and respond rapidly. This is especially true for detecting conditions such as short-circuit and over-current. For instance, it is necessary to arrest the fault condition from an over-current situation Read more [...]

Sensitive Magnetic-Field Sensor Has Low Noise

Although applications for magnetic sensors cover a vast field, ranging from the gigantic magnetic resonance imaging or MRI systems to sensing tiny gear-teeth, they are one of the most overlooked or misunderstood among the modern sensors in use. Researchers are constantly on the lookout for increasingly small but more sensitive magnetic-field sensors. However, sensitivity alone is not the only qualifying parameter for such sensors—low-level transducers require to be low-noise as well. That is Read more [...]

Near-Zero-Power Sensors

The US Department of Defense has a research and development agency, the defense advanced research projects agency or DARPA, which have recently concluded a program N-ZERO—the near-zero power rf and sensor operations. One dramatic outcome of this program is sensors in the battlefield earlier running out of power in weeks or months can now keep operating for more than four years before they need a replacement of their coin batteries. DARPA’s initiatives began about five years back, with the Read more [...]

Contactless Magnetic Angle Sensing

Contactless magnetic angle position sensors are now giving optical encoders a run for their money. This was recently demonstrated by Monolithic Power Systems at Electronica 2018. They had on display a unique non-automotive-focused electric vehicle, mCar, with motion control and angular sensors. According to MPS, their mCar demos two main functions—motor control elements, and angular position sensors.
As Quitugua-Flores, the mechanical engineer and primary designer of the mCar at MPS explains, Read more [...]

Metamaterials Improve LIDAR

Light Detection and Ranging or LIDAR is a remote sensing method. The technique uses the time of flight of pulsed laser light to measure variable distances. Airborne systems record additional data, which, when combined with the data from the light pulses are able to generate three-dimensional information about the neighboring environment that offer precise surface characteristics.
In general, a LIDAR comprises a laser, a scanner, and a specialized receiver for Global Positioning System or GPS. Although Read more [...]

Thermopile Sensors for IoT

mart and connected technologies are presently driving the astonishing growth of the Internet of Things (IoT). However, growth in these technologies is, in turn, a result of the tremendous development of various sensors. According to the Boston Consulting Group, by 2020, expect to spend US$ 265 billion for IoT technologies, services, and products. Much of this growth will owe its progress to that of sensors.
One can now find sensors almost everywhere, for instance, in smart retail, smart healthcare, Read more [...]

Why you need Sensor as well as PLC Data

In the Industry, collection of IoT data, specifically that from manufacturing processes is very important. Apart from the quantity of the data collected, the quality of information from various machines is also equally vital for analysis, and to make decisions.
IIoT puts a lot of stress on the usefulness of predictive analytics based on big data. According to the Forbes magazine, big data offers the volume, speed, and variety of information about important effects that traditional methods of empirical Read more [...]

What are Linear Image Sensors?

Fairchild Imaging makes CMOS 1421, a linear image sensor. This is an imaging device with a wide dynamic range of 94 dB or 52000:1, with excellent linearity. The device is a linear sensor, meaning it has 2048 x 1 high-resolution imaging sensors. Fairchild has designed this linear sensor for medical and scientific line scan applications such as optical inspection or fluorescent imaging that require wide dynamic range, high sensitivity, and low noise operation.

With several acquisition modes, this Read more [...]