$62.71

Oakton WD-35662-15 TDSTestr 11+ Multi-Range TDS Tester ATC Used New Batteries

$27.89

PH Meter for Water Hydroponics Digital PH Tester Pen 0.01 High Accuracy Pocke...

$59.99

OAKTON ECO TESTR TDS Testr 11 Dual Range Tested Working!

$15.73

Water Tester for Drinking Water- TDS Meter

$8.98

Digital Water Quality Tester 4 in 1 TDS Meter TDS EC & Temperature(°C,°F) Meter

$46.83

YAMRON 4-in-1 Soil Moisture Meter, Digital Plant Temperature/Soil white

$19.89

Sukiise Soil Sample Probe 12 Inch with T Handle, Soil Sampler Tool, Soil Test Ki

$2.18

Digital PH/EC/TDS/TEMP Tester Water Quality Monitor Water pH Tester + Test Paper

$12.95

Electronic Water Quality Tester Z-Tester HM Digital

$114.75

pH Pen - ± 0.1 pH Accurate, Durable Double Junction Probe, Waterproof & Float...

$16.23

Springfield Indoor Outdoor Big and Bold Dial Thermometer, No Size, White

$98.62

Smart Monitor Fish Tank Aquarium Pool WIFI PH ORP EC PPM Water Quality Sensor