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pH Meters

Hanna GroLine Waterproof Hydroponic pH Tester
Out of stock
$124.20 $139.99 -11%
Active Air 2-Way Moisture/pH Meter
In Stock: 1085
$7.80 $11.84 -34%
Active Air 2-Way pH & Moisture Meter | 1ct
In Stock: 13
$9.67 $13.99 -31%
Milwaukee Instruments pH 600 pH Tester w/1 Point Manual Calibration
In Stock: 99
$32.76 $35.00 -6%
HM Digital PH-80 pH/Temperature Meter
In Stock: 200
$38.53 $46.50 -17%
Dilution Solutions Pro HM Digital pH Meter | 7.3in x 1.3in x 1.3in
In Stock: 7
$93.15 $99.95 -7%
Hanna EC Conductivity Calibration Solution | 1, 413 µS/cm
In Stock: 6
$26.99 $27.99 -4%
GroStar GS1 pH Pen
In Stock: 284
$99.72 $115.99 -14%
GroStar GS2-E replacement Soil Spear pH electrode
In Stock: 101
$150.68 $181.99 -17%
GroStar GS4-E replacement pH/EC combo electrode
In Stock: 87
$66.23 $79.99 -17%
Bluelab Guardian Monitor In-Line Connect | 10 ft In-line Probe Cable
Out of stock
$581.75 $814.77 -29%
GroStar GS1-E replacement pH electrode
In Stock: 101
$42.21 $50.99 -17%
Bluelab Connect Pro Controller | Remote Monitoring of pH, EC and Temperature
Out of stock
$1,392.10 $1,812.17 -23%
Hydrofarm Active Air 3-Way Meter
In Stock: 51
$10.71 $14.99 -29%
Inline pH Sensor, Heavy Duty
In Stock: 9
$178.19 $197.40 -10%
Heavy Duty Nutrient pH Sensor, drop-in/in-line compatible
In Stock: 9
$199.79 $219.45 -9%
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