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Luster Leaf 1617CS Rapitest Water Check Clip Strip for Constant Monitoring NIP

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Sustee Aquameter, Set of 5, Plant Soil Moisture Sensor (Green, Small)

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SALT-3050 Waterproof Salinity Tester: Digital Salinity and Temp Meter for Pools

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Soil Moisture Meter for House Plants, Plant Water Meter,Plant Moisture Meter for

$3

Multifunction Water Quality Tester

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Oakton pH Spear+ Waterproof Pocket Tester

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Soil Ph Meter Soil Moisture Sensor Meter Soil Ph Tester Gardening Tool Kits For

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Luster Leaf 1601 Rapitest Test Kit for Soil pH, Nitrogen, Phosphorous and Potash

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Portable 4 In 1 Hydrogen-Rich Test Pen PH/ORP/TEMP Water Quality Meter Tester

$10.58

Compact Water Testing Kit - 4-in-1 TDS Meter with Backlit Display for Accuracy

$13.48

3-in-1 Soil pH Meter - Moisture, Light, and pH Tester for Garden, Lawn, Farm, In

$53.05

2-in-1 Combo pH & Temperature Meter Water Tester Replaceable BNC pH Electrode fo