The Extech single output switching mode DC power supply converts local AC mains power into DC power, with adjustable voltage and current levels.
The Extech Switching Mode DC Power Supply is a dual action voltage and current control supply with push knob for fine and coarse tuning. The unit has 0 to 30V, 20A adjustable output switching mode power supply. A remote control is used for output voltage/current and on/off, and two user-defined voltage and current presets are avaiable, as well as one 13.8V/20A factory preset. The supply has an over voltage, over-temperature, and short circuit protection.
|Image||Part #||Product Description||Price||Stock||Order|
|382275||Switching mode DC power supply (120 V)||
|Drop ships from manufacturer|
|382276||Switching mode DC power supply (230 V)||
Drop ships from manufacturer
For most of us, when we think of nitrate and agricultural pollution, we think of the nitrate that comes from fertilizers and leaches quickly through the soil. The effects of this kind of pollution are realized quickly, but researchers from Lancaster University and the British Geological Survey have recently revealed an underground time bomb of nitrate in rock. In the recent paper , lead author and hydrogeologist Matthew Ascott and the team quantified the vast amounts of nitrate that exist within the layers of rock between the soil and groundwater tables for the first time. They discovered that there is about twice as much nitrate lurking in this rocky vadose zone than there is in the soil—up to 180 million tons—nitrate that has been omitted from global scale nitrogen budgets.Read More
In a state that knows water is perhaps the single most decisive factor in its continued existence, the Arizona Water Center (AWC), part of the United States Geological Survey (USGS), plays a critically important role. James Leenhouts, Director of the AWC and a hydrologist by training, has lived in Arizona for decades, and devoted his career to helping Arizonans cope with the unique challenges water presents. “A key part of what we do is provide information for resource managers to answer their questions,” Leenhouts explains. “For example, if someone wants to put wells in a certain place in the aquifer, how will it affect nearby wells?” It's a fair question.Read More
In many cases, new instrumentation leads to new knowledge, which leads to a new publication. But for Warren Wood, visiting professor of hydrogeology at Michigan State University, and his colleague David Hyndman, also a Michigan State University hydrogeologist, their new study arose from looking at previously gathered data in a new way. “In the paper, we estimated that a significant amount of CO2, 1.7 million metric tons per year, was likely being added to the atmosphere because groundwater has been tapped so much in recent years. A number of things went into our calculation. I had 40 years’ worth of groundwater data from my career at the United States Geological Survey (USGS). I also had a lifetime of experience with hydrogeology issues.Read More