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A simple soil moisture sensor for gardeners. Soil moisture sensors measure the volumetric water content in soil. [1] Since the direct gravimetric measurement of free soil moisture requires removing, drying, and weighing of a sample, soil moisture sensors measure the volumetric water content indirectly by using some other property of the soil, such as electrical resistance, dielectric constant ...
Capacitance probe, or fringe capacitance sensor.Capacitance probes use capacitance to measure the dielectric permittivity of the soil. The volume of water in the total volume of soil most heavily influences the dielectric permittivity of the soil because the dielectric constant of water (80) is much greater than the other constituents of the soil (mineral soil: 4, organic matter: 4, air: 1).
The sensor contains a waveguide consisting of two, three, or more parallel wires which is connected via a coaxial cable to a voltage pulse generator which sends precisely defined voltage pulses into the sensor. As the pulse travels along the waveguide its progress varies depending on the moisture content of the material being examined.
A sensor node, also known as a mote (chiefly in North America), is a node in a sensor network that is capable of performing some processing [1], gathering sensory information and communicating with other connected nodes in the network. A mote is a node but a node is not always a mote.
In February 2014, the company also acquired Solum, a soil testing company based in Ames, Iowa. [ 10 ] In December 2014, the company acquired 640 Labs, an agricultural technology startup based in Chicago. 640 Labs created the Drive device (later renamed the Fieldview Drive) that reads data from the CANBUS of tractors and connects to an iPad or ...
The owners of the California gas station who sold the fifth largest Mega Millions ticket in history on Friday were elated to learn their store had played a small part in the $1.22 billion jackpot ...
Crankshaft position sensor (CKP) Curb feeler; Defect detector; Engine coolant temperature sensor; Hall effect sensor; Wheel speed sensor; Airbag sensors; Automatic transmission speed sensor; Brake fluid pressure sensor; Camshaft position sensor (CMP) Cylinder Head Temperature gauge; Engine crankcase pressure sensor; Exhaust gas temperature ...
On the weekend of Aug. 10-11, the National Weather Service (NWS) reported a total of 8,953 lightning discharges across San Diego County, including 713 that were cloud-to-ground strikes.Most of the ...