*ATC-Automatic Temperature Compensation

Optimize nutrient strength during growth, flowering, and fruiting Reliable waterproof, dustproof housing and replaceable electrode provide long life and value. Auto shutoff conserves battery life.
Oakton pH Testers 10, 20, & 30 feature large display screens

Replacement sensors:
OK-35624-09 for pHTestr 1
OK-35624-29 for pHTestr 2
OK-35653-01 pH 4.0?calibration solution

Item Specifications
Part Number: 131983
Dimensional Weight: 1 lbs