"• Optimize your wastewater treatment process by monitoring nutrient levels • Tube digestions for nitrogen and phosphate nutrient removal monitoring• Results in about an hour provide timely data to correct the process Avoid the excess chemical cost of overtreatment while preventing the risk of under-treating your discharge and exceeding regulated limits. Thermo Scientific AQUAfast system utilizes the persulfate digestion tube method to provide accurate results in about an hour. System includes: the AQ3700 colorimeter, tube digestion tests, and the thermo reactor.A. AQUAfast Digestion Test Kits<\/b>|Each kit includes the reagents and accessories for 50 tests.B. COD165 Thermal Reactor<\/B>|Ideal for all 16-mm tube digestions; easily set-up for up to 25 tubes simultaneously. Preset reaction times of 30, 60 and 120 minutes, or use continuous mode for other digestion times. Set temperature to 100, 120, 150, 160, or 165C to start the reactor.C. AQUAfast 3700 Colorimeter<\/b>|This waterproof, portable unit combines accuracy with durability. View results in concentration from easy-to-read LCD. Includes 16- and 24-mm vials, adapter for 16-mm tubes and 13-mm vials, carrying case, and four AA batteries."