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.
Yes, buying sour beer to make your own sour beer sounds a little odd, and it certainly increases your costs, but it's the easiest way to get the cultures you need. And on the plus side, you get to drink 80% of a bottle of world-class sour beer. The other 20% will give you far more beer in return.