Brand：
$130.00
SE
KeDiDa CT-6322 pH & Conductivity Detector Pen Range: 0.0~14.0PH/0.0~199.9US
pH：0.0 to 14.0pH；电导： 0.0 to 1999 uS/cm
$113.00
SE
SMART SENSOR AR8011 Written test conductivity /TDS
0ppm~1999ppm / 0ppt~19.99ppt
Conductivity Measurement range 0uS~ 199uS/2.00uS~ 19.99uS, TDS Measurement range 0ppm~ 1999ppm/0ppt~ 19.99ppt, Conductivity Detector /TDS Measurement accuracy +/- 3%, Repeatability +/- 1% uS/0.01ms, automatic temperature compensation.
$127.00
SE
KeDiDa CT-6321 pH meter/Conductivity Detector Range: 0.0~14.0PH/0.0~199.9US
pH：0.0 to 14.0pH；电导： 0.0 to 199.9uS/cm
$130.00
SE
Ammonia electrode filler, 480 ml
Gas sensing electrode filling solution, capacity 480 ml
If you don't know how to choose "STIP-scan", please consult customer service.