Testing for Radon. Perform a radon test before you close on the property. Use EPA testing guidelines to choose a test and tester. Ask the tester how you can prevent device interference during the test. If radon levels are above 4 pCi/L, or your own stated maximum, use mitigation techniques for reduction, then test again. If Radon Levels Are Too High
They did research and came up with this spectacular invention of the worldâs most sensitive scale. The device can significantly measure the smallest unit of a mass, or also known as the yoctogram which is just one septillionth of a gram.
The instrument to measure the density of a liquid is called a hydrometer. It is one of the simplest of scientific-measuring devices, and you can even make your own out of a plastic straws (see links below). More often, though, it is made of glass and look a lot like a thermometer.