Hanna Instruments HI96734 High Range Free and Total Chlorine Portable Photometer with Sample Cuvettes, 7-19/32" Length x 4-3/32" Width x 2-11/16" Height, 0.00-10.00mg/L Free Cl, 0.00-10.00mg/L Total Cl, 0.01mg/L Resolution, 9V Battery

Bleach/chlorine is the most cost effective disinfectant and is used extensively in dialysis clinics. Its use varies from light duty application in surface sanitation to heavy duty disinfection of medical devices or removal of microorganism infections in piping systems. The advantage of chlorine over peroxide type disinfectants is that chlorine not only is a strong oxidant, it also is capable of breaking tough chemical bounds found in cell walls or biofilms. Correct and effective use of bleach/chlorine requires understanding of the chemical nature of the disinfectant. HI96734 permits free and total chlorine analysis to monitor overchlorination through chloramine destruction. The HI96734 photometer uses an exclusive positive-locking system to ensure that the cuvette is in the same place every time it is placed into the measurement cell. The cuvette has a very important role because it is an optical element and thus requires particular attention. It is important that both the measurement and calibration (zeroing) cuvettes, are optically identical to provide the same measuring conditions. HI96734 is supplied with 2 sample cuvettes with caps, battery and instructions. 0.00 To 10.00 milligrams per liter free Cl, 0.00 To 10.00 milligrams per liter total Cl range. 0.01 milligrams per liter from 0.00 to 3.50 milligrams per liter; 0.10 milligrams per liter above 3.50 milligrams per liter resolution. +/-0.03 milligrams per liter +/-3 percent of reading at 25 degree C accuracy, excluding dilution error. Tungsten lamp. Silicon photocell with narrow band interference filter at 525nm light detector. Adaptation of the USEPA method 330.5and standard method 4500-Cl G. 0 to 50 degree C (32 to 122 degree F); RH maximum 95 percent non-condensing environment. Auto-shut off: after ten minutes of non-use in measurement mode, after one hour of non-use in calibration mode with last reading reminder. Measures 7.6" length by 4.1" width by 2.7" height.