Brand：
$203.00
SE
QIWEI ZYL portable residual chlorine meter residual chlorine concentration detection
0~5mg/L
$217.00
SE
QIWEI JPB-607A portable intelligent dissolved oxygen analyzer
Dissolved oxygenDissolved oxygen: (0.0~20.0) mg/L; temperature: (0~40) ℃
If you don't know how to choose "STIP-scan", please consult customer service.