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Turbidity Meter AL400T-WL with white light source ( US EPA 180.1) The AL400T-WL allows easy turbidity measurement in either the field or in the laboratory. Using a „ white light“ source and 90° detection, the AL400T-WL meets the specifications for EPA turbidity measurement ( EPA Standard 180.1) . A power efficient micro-circuit design allows the instrument to yield 5000 tests on 4-AA alkaline batteries with an estimated 7-10 year bulb life. Integrated diagnostics confirm proper operation and accuracy. The instrument features an Auto-Ranging feature that automatically selects the correct turbidity range for your sample. Calibration is simple with the included calibration standards. Delivery content The AL400T-WL comes ready to use in a sturdy handy case with following accessories: 2 sample vials, 3 turbidity standards, 4 batteries, instruction manual and guarantee sheet. Technical data - Display large LCD display - Keypad 5 key polycarbonate membrane, splash proof - Power supply 4 AA Alkaline batteries for approx. 20h continuous opeation or 3500 tests - Range 0.01 to 1100 NTU - Accuracy ± 2% of reading or 0.01 NTU ( 0-500 NTU) , ± 3% of reading ( 500-1100 NTU) - Resolution 0.01 NTU to 100.0 NTU 0.1 NTU from 100.0 to 999.9 NTU 1.0 NTU from 1000 to 1100 NTU - Housing ABS - Dimensions 210 x 95 x 45 mm - Weight approx. 0, 45 kg ( base unit) - Ambient conditions Temperature: 0 – 50 ° C, rel. humidity: 0 – 90% - CE-Conformity Â