Topic: Technologies in Depth
Single photons are elementary particles that are arguably the most tangible, yet some of the most difficult to detect and characterize as single entities. Techniques to count single photons require optical detectors with linear operation, high gain, wide bandwidth and low noise. This article will describe a variety of approaches to detect and count single photons, the key measurement metrics, and potential applications of single photon sensors.
Continuous-wave cavity ring-down spectroscopy uses the behavior of laser light passed through a gas sample to provide fast and accurate measurements of contaminants down to parts per trillion (ppt) levels.
Ethernet powers our home and office networks and it is increasingly being used to automate control processes on the plant floor. Here's why.
The next generation of networks will move beyond disconnected device-specific networks and systems and toward a distributed infrastructure, with intelligent functions residing across the entire network, from its edge to its core.
Last month we discussed how IMS and DMS are used for trace chemical detection. Now we consider how the two technologies can be used in tandem to achieve greater selectivity and sensitivity and fewer false positives.
By using an indirect current-feedback topology, instrumentation amplifiers can avoid some of the pitfalls inherent in using three op amp instrumentation amplifiers powered from single supply voltages.
The first installment of this two-part series discusses ion mobility spectroscopy (IMS), the leading contender for fast and reliable detection of trace chemicals, and differential ion mobility spectroscopy (DMS), a related technology that provides faster, smaller and more sensitive sensors capable of detecting chemicals in environments with greater concentrations of interfering substances.
With the variety of wireless technologies available, outfitting an industrial or commercial environment for wireless communications may involve mixing and matching technologies to find the optimal solution. Here are the issues to consider to make your mix a successful one.
Flexible sensors can go where rigid sensors cannot, alleviating many maintenance headaches.
Knowing the viscosity of an oil allows you to determine its condition; we evaluate a real-time viscosity sensor and compare its results with those generated using a lab rheometer.