Hydrocarbon Test Kit for Soil uses three simple steps: extraction, filtration and analysis. Up to 10 tests can be run concurrently, so you can easily complete 25 samples in an hour. Uses no chlorofluorocarbons and all spent reagents are easily disposed of. Test Kit includes hand-held digital analyzer, portable electronic balance, digital countdown timer, two calibration standards, reagents for 10 tests and convenient carrying case. Refill Reagent Kit (No. 29210C) sold separately.