$104.00
SE
Qiwei DDB-12H Pen Conductivity Detector measuring range 0~19.99ms/cm
±2% F.SConductivity Detector0~19.99mS/cm

$119.00
SE
SMART SENSOR AR8211 + conductivity TDS Conductivity Meter /TDS
0~199μS / 2.00~19.99mS

$98.00
SE
Qiwei DDB-12L pen conductivity meter measuring range 0~1999uS/cm
0~1999μS/cm±2% F.SConductivity Detector, temperature

If you don't know how to choose "Conductivity Meter", please consult customer service.