Hydrogen sulfide (H2S) sensor is a gas sensor employed for measuring hydrogen sulfide. It is a metal oxide semiconductor that works by reversibly changing the resistance caused by desorption and adsorption of hydrogen sulfide in a film.
By Kalwinder Kaur
26 Jun 2013
Wilson’s chamber, also known as a cloud chamber, is used for the detection of ionizing radiation particles.
By Kalwinder Kaur
26 Jun 2013
A sun sensor is a device that senses the direction to the Sun to measure the position of the sun or other light sources with respect to the sensor position.
A geophone is a ground motion transducer that has been used by geophysicists and seismologists to convert ground movement into voltage. Any deviation in this measured voltage from the base line is regarded as seismic response, which is used for analyzing the earth’s structure.
A water sensor is a device used in the detection of the water level for various applications, and can come in various designs.
A fish counter is a device used for measuring the number of fishes passing along the river within a period of time. Atlantic salmon is one of the most important species studied using this device.
Positron emission tomography (PET) is a non-invasive imaging method that provides quantitative biochemical and molecular information on the physiological processes of the body. This concept was first introduced by Roy Edwards, Luke Chapman and David E. Kuhl in the later 1950’s.
A radar gun is a device for measuring the speed of moving objects. Invented by Bryce K. Brown in 1954, the radar gun is often used in law-enforcement purposes to calculate the speed of moving vehicles.
In recent years, the demand for more auto safety features and better crash-rating systems has increased, with the increasing number of crashes and the fatalities and injuries related to these crashes.
The evolution of self-powered sensors was spurred on by the inconvenience of having to replace batteries in various devices.