Since there is no silver present

Long-term storage (dry storage):

Dual Measurement Modes

and after extended storage for best accuracy

Hanna HI726 Nickel Checker | High Range Digital Colorimeter 0-7 g/L chlorine tester Since there is no silverGain accurate water testing results with our simple handheld colorimeter. Our high range nickel colorimeter fills the gap between advanced technology and your typical chemical test kit. Our handheld colorimeter eliminates the hassle of matching to a color chart by providing a direct nickel result digitally so you don't have to struggle anymore. Small and portable design to take it anywhere. Simple, one button operation makes using our colorimeter