TURBIDITY METER Features: Rugged portable carrying case, Ensures durability and convenience no matter where your laboratory happens to be Completly self contained, Provides easy access to everything you need to take a measurement Three user selectable ranges, Provides accuracy in a wide variety of applications from 0 to 1000 NTU 20 hour rechargeable battery, Always be ready to go with up to 20 hours of continuous operation when fully charged Made in the USA Designed to provide the rugged portability needed in the field with the accuracy demanded in the laboratory, the EPA accepted DRT-15CE has become a “must have” for anyone monitoring turbidity on the go. The integral carrying case holds everything needed for field operation. With resolution of 0.01 NTU and an extended range to 1,000 NTU, the DRT-15CE is a perfect fit for both field and laboratory use. Includes:  DRT-15CE Portable Turbidimeter, 0 - 1000 NTU, (white light, 240V) Battery charger Sample cuvette with light shield cap, 0.02 NTU reference standard Recorder output plug Instruction manual. Specifications: Principal of operation: Nephelometric -USEPA Method 180.1. Range:  0 - 10 NTU, 0 - 100 NTU, 0 - 1000 NTU. Accuracy:  0-10 NTU ± 1% of full scale;  0-100 NTU, ±5% of full scale;  0-1000 NTU, ±10% of full scale. Resolution:  0.1% of selected range. Response time: Immediate. Sample size:  25 ml (16 ml minimum). Operating temperature: 0° to 50°C (32° to 122°F). Battery:  6V gel-cell rechargeable with 20 hours of continuous use when fully charged. Recharge time:  8 hours to full charge. Dimensions: 11 x 8 x 5 inches (28 x 20 x 14 cm). Weight:  5 lbs. (2.27 kg). Safety rating: UL, CSA.