This is a replacement part, not an entire unit! Optimize nutrient strength
during growth, flowering,
Same reliable waterproof dustproof housing as pHTestr. Choose from models for TDS or conductivity (ECTestr); 1% accuracy.
Replacement sensors and solutions
OK-35661-17 for TDSTestr Low, High, ECTestr High
OK-35653-13 15 mS calibration solution for High Testrs