2020I PORTABLE TURBIDITY METERS VERSION 2020I (ORDER CODE 1974-I) MEETS THE DESIGN CRITERIA FOR QUANTITATIVE TURBIDITY METHODS USING OPTICAL TURBIDIMETERS AS SPECIFIED BY ISO 7027. BEST FOR COLORED OR EXTREMELY TURBID SAMPLES. ADVANCED CALIBRATION ALGORITHMS MENU OPERATION AND LARGE LCD DISPLAY 500-POINT DATA LOGGING; STORED RESULTS CAN BE VIEWED DIRECTLY ON THE INSTRUMENT SUPPLIED KITS 0, 10, 100 FNU (CODE 1974-I), SAMPLE BOTTLE, SIX SAMPLE TUBES, USB CABLE AND WALL ADAPTER. LI-ION RECHARGEABLE BATTERY USB PORT BACKLIT DISPLAY RANGE SELECTION: AUTOMATIC LIGHT SOURCE: 2020I: LED IR 860NM ± 10NM, SPECTRAL BANDWIDTH 50NM DETECTOR: 2020I: PHOTODIODE, CENTERED AT 90° AND 180° SPECIFICATIONS POWER: AVERAGE SIGNAL: OFF, 2, 5, 10 POWER: COMPUTER USB CABLE, WALL ADAPTER OR RECHARGEABLE LI-ION BATTERY, 3.7V, 2.5” X 0.75”, 1 .7 OZ DATALOGGING: 500 POINTS AUTO POWER OFF: OFF, 5, 10, 30 SECONDS RESPONSE TIME: <2 SECONDS SIZE: 7.5 X 3.5 X 2.5 INCHES; 19.05 X 8.84 X 6.35 CM DISPLAY: 6-LINE LCD WITH BACKLIT DISPLAY