•Used to check the performance of your water filter
•Used to check for hardness(1 grain=17ppm)
•Hold fuction:saves measurements for convenient reading and recording.
•Auto-off function:turns off meter after 10 minutes of non-use to conserve batteries.
•Dual range:measures from 0-999ppm,with a resolution of 1ppm.From 1000 to 9990ppm, the resolution is 10ppm,indicated by drinking x 10 symbol,Factory calibrated.