Many NOx sensors work by first removing oxygen and then breaking down the nitrogen oxides to provide a reading. However, the NexTech sensor eliminates the need to remove oxygen; the sensor material is engineered to have a strong NOx sensitivity even in the presence of oxygen.
Sour beers are probably the oldest style of brew in the world, but they're just starting to get popular in the States. They were all the buzz at this year's Great American Beer Festival. And with hundreds of brewers now dabbling in sours, it's easier than ever to find them at a local bar or grocery store.
Sour cream is a dairy product obtained by fermenting regular cream with a bacterial culture that sours and thickens the cream. [1] The resulting product is high in fat, but can be found in reduced fat and non-fat versions and can also be mixed with a variety of spices to create dips.