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pH Meters

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Bluelab Connect Pro Controller | Remote Monitoring of pH, EC and Temperature
Out of stock
$1,224.13
Bluelab Guardian Monitor In-Line Connect | 10 ft In-line Probe Cable
Out of stock
$550.38
Bluelab pH Controller | 6.5ft Probe Cable - Dose pH Up or pH Down
In stock
$490.98 $640.60 -23%
Bluelab Connect pH Controller | for Bluelab Connect Devices
In stock
$441.05 $683.36 -35%
Bluelab Guardian Monitor Connect | 6.5ft Probe Cable
Out of stock
$419.14
Bluelab Guardian Monitor | 6.5ft Probe Cable
Out of stock
$375.38
Bluelab Combo Meter Plus | Measures pH, Conductivity & Temperature
In stock
$349.12
Bluelab Combo Meter | 6.5ft Probe Cable
In stock
$296.63
Save 17%
GroStar GS2 Soil pH Pen
In stock
$212.78 $256.99 -17%
Save 10%
Heavy Duty Nutrient pH Sensor, drop-in/in-line compatible
In stock
$196.83 $219.45 -10%
Bluelab Soil pH Pen
In stock
$182.88
Bluelab pH Probe Inline | 3/4in NPT Thread - Use with 1in Adapter
In stock
$182.88
Save 11%
Inline pH Sensor, Heavy Duty
In stock
$175.55 $197.40 -11%
Bluelab Multimedia pH Meter | 6.5ft Probe Cable
In stock
$156.67 $255.74 -39%
Save 17%
GroStar GS2-E replacement Soil Spear pH electrode
In stock
$150.68 $181.99 -17%
Save 17%
GroStar GS4 pH/EC/500ppm/700ppm/Temp (5-in-1) Combo Pen
In stock
$148.20 $178.99 -17%
Hanna GroLine Waterproof Hydroponic pH Tester
Out of stock
$132.99
Bluelab Leap pH Probe | For Bluelab Combo Meter - Bluelab Combo Meter Plus - and Bluelab Multimedia pH Meters
In stock
$126.88
Bluelab pH Pen Meter | Measures pH and Temperature
In stock
$109.38
Save 15%
GroStar GS1 pH Pen
In stock
$98.27 $115.99 -15%
Save 15%
Dilution Solutions Pro HM Digital pH Meter | 7.3in x 1.3in x 1.3in
In stock
$85.01 $99.95 -15%
Bluelab Combo Meter pH Replacement Probe | pH probe
In stock
$80.50
Save 17%
GroStar GS4-E replacement pH/EC combo electrode
In stock
$66.23 $79.99 -17%
Save 17%
HM Digital Replacement pH Sensor Probe for HM-500
In stock
$49.67 $59.99 -17%
Save 17%
GroStar GS1-E replacement pH electrode
In stock
$42.21 $50.99 -17%
Save 17%
HM Digital PH-80 pH/Temperature Meter
In stock
$38.53 $46.50 -17%
Dilution Solutions HM Digital pH Tester | 6in x 1.7in x .7in
Out of stock
$37.66 $49.95 -25%
Save 5%
Milwaukee Instruments pH 600 pH Tester w/1 Point Manual Calibration
In stock
$28.37 $30.00 -5%
Save 5%
Milwaukee Instruments pH600 Digital pH Pen
In stock
$27.41 $29.00 -5%
Hanna EC Conductivity Calibration Solution | 1, 413 µS/cm
Out of stock
$24.49
Luster Leaf Rapitest Light & Moisture Meter | Dual Tester
In stock
$21.74 $29.99 -28%
Save 17%
GroStar pH Probe Maintanence Kit
In stock
$19.86 $23.99 -17%
Luster Leaf Rapitest Digital Soil pH Meter | Results From 3.5 - 9.0
In stock
$15.41 $21.29 -28%
SUNPACK 2-Function Plant Sensor Meter | 2-Function - Measures Soil Moisture & pH
In stock
$12.46 $15.79 -21%
Hydrofarm Active Air 3-Way Meter
In stock
$10.10 $14.99 -33%
Active Air 2-Way pH & Moisture Meter | 1ct
In stock
$9.12 $13.99 -35%
Active Air 2-Way Moisture/pH Meter
In stock
$8.17 $11.84 -31%
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