The operation of the meter is simplified with only two buttons: one button is to calibrate with distilled or deionized water and the other to take a measurement

2 x AAA batteries included

Since there is no silver present

Better Detergent Performance - Soft water allows detergents to work effectively

total dissolved solids (TDS)

Hanna HI726 Nickel Checker | High Range Digital Colorimeter 0-7 g/L chlorine tester The operation of the meterGain 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