Hach have replaced LCK414 with LCK1414. The LCK414 cuvette test for measuring the chemical oxygen demand between 5.0 -60 mg/L O2 using the dichromate method has recently changed reference number to LCK1414. This new part number contains 25 vials per box (the LCK414 had 24) and does not need a zero-solution, saving working steps and times. If you would like more information about the LCK1...