Brand：
$103.00
SE
Qiwei DDB-12H Pen Conductivity Detector measuring range 0~19.99ms/cm
±2% F.SConductivity Detector0~19.99mS/cm
$97.00
SE
Qiwei DDB-12L pen conductivity meter measuring range 0~1999uS/cm
±2% F.SConductivity Detector, temperature0~1999μS/cm
If you don't know how to choose "Conductivity Meter", please consult customer service.