This concentrated reagent for Alkatronic will prepare 20L of reagent for use after it has been diluted. The suggested measurement interval for the Alkatronic is every 4 hours. 1 liter of reagent is left for 1 month. 20L of reagent is able to measure approx. 2500. Based on 6 measurements per day (4 hour interval), this bottle of concentrated reagent will last more than 1 year. With this option, the operating costs are extremely low and we can fully use the Alkatronic to run more tests per day.