Hanna Instruments HI96723 High Range Chromium VI Portable Photometer with Sample Cuvettes, 7-19/32" Length x 4-3/32" Width x 2-11/16" Height, 0 - 1000 microgram/L, 1 microgram/L Resolution, 9V Battery

At normal temperatures chromium is corrosion-resistant. For this reason, it plays an important role in the plating industry as well as cooling towers. In addition, it has certain qualities that make it useful in the production processes of the textile industry. The HI96723 meter measures the hexavalent chromium (Cr VI) content in water and waste waters samples. The meter uses an exclusive positive-locking system to ensure that the cuvette is in the same position every time it is placed into the measurement cell. HI96723 is supplied with 2 sample cuvettes with caps, 9V battery and instruction manual. 0 - 1000 microgram/L range. 1microgram/L (ppm) resolution. +/-5micro g/L +/-4 percent of reading at 25 degree C accuracy. Tungsten lamp. Silicon photocell with narrow band interference filter at 525nm light detector. 0 - 50 degree C (32 to 122 degree F); RH maximum 95 percent non-condensing environment. 9V Battery. After 10 minutes of non-use in measurement mode; after 1 hour of non-use in calibration mode; with last reading reminder auto-shut off. Measures 7.6" length by 4.1" width by 2.7" height. Adaptation of the ASTM manual of water and environmental technology, D1687-92, diphenylcarbohyzide method. The reaction between Cr VI and reagents causes a purple tint in the sample.