TDS meter
PH meter

TDS meter
PH meter

FEATURES
Hold function: Saves measurements for convenient reading and recording.
Auto-off function: turn on meter after 8 minutes of non-use to conserve batteries, and will be locked automatically after 2 minutes.
Dual range: measures from 0-999ppm, with a resolution is 10 ppm, indicated by drinking*10 image, factory calibrated.
Range:0-9990ppm
Accuracy:+/-2%
Battery:2*1.5V(button cell)
Size:140*23*15MM