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pH Meters

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Bluelab Connect Pro Controller | Remote Monitoring of pH, EC and Temperature
Out of stock
$1,214.93
Bluelab Guardian Monitor In-Line Connect | 10 ft In-line Probe Cable
Out of stock
$546.24
Bluelab Connect pH Controller | for Bluelab Connect Devices
In stock
$519.96 $683.36 -24%
Bluelab pH Controller | 6.5ft Probe Cable - Dose pH Up or pH Down
In stock
$487.42 $640.60 -24%
Bluelab Guardian Monitor Connect | 6.5ft Probe Cable
Out of stock
$415.98
Bluelab Combo Meter Plus | Measures pH, Conductivity & Temperature
In stock
$346.50
Bluelab Combo Meter | 6.5ft Probe Cable
In stock
$294.40
Save 18%
GroStar GS2 Soil pH Pen
In stock
$211.24 $256.99 -18%
Save 11%
Heavy Duty Nutrient pH Sensor, drop-in/in-line compatible
In stock
$195.35 $219.45 -11%
Bluelab Soil pH Pen
In stock
$181.50
Bluelab pH Probe Inline | 3/4in NPT Thread - Use with 1in Adapter
In stock
$181.50
Bluelab Guardian Monitor | 6.5ft Probe Cable
In stock
$176.32 $366.91 -52%
Save 12%
Inline pH Sensor, Heavy Duty
In stock
$174.23 $197.40 -12%
Bluelab Multimedia pH Meter | 6.5ft Probe Cable
In stock
$155.54 $255.74 -39%
Save 18%
GroStar GS2-E replacement Soil Spear pH electrode
In stock
$149.59 $181.99 -18%
Save 18%
GroStar GS4 pH/EC/500ppm/700ppm/Temp (5-in-1) Combo Pen
In stock
$147.12 $178.99 -18%
Hanna GroLine Waterproof Hydroponic pH Tester
Out of stock
$131.99
Bluelab Leap pH Probe | For Bluelab Combo Meter - Bluelab Combo Meter Plus - and Bluelab Multimedia pH Meters
In stock
$125.93
Bluelab pH Pen Meter | Measures pH and Temperature
In stock
$108.56
Save 14%
GroStar GS1 pH Pen
In stock
$99.72 $115.99 -14%
Bluelab Combo Meter pH Replacement Probe | pH probe
In stock
$79.90
Dilution Solutions Pro HM Digital pH Meter | 7.3in x 1.3in x 1.3in
In stock
$72.84 $99.95 -27%
Save 18%
GroStar GS4-E replacement pH/EC combo electrode
In stock
$65.75 $79.99 -18%
Save 18%
HM Digital Replacement pH Sensor Probe for HM-500
In stock
$49.31 $59.99 -18%
Save 18%
GroStar GS1-E replacement pH electrode
In stock
$41.91 $50.99 -18%
Save 18%
HM Digital PH-80 pH/Temperature Meter
In stock
$38.25 $46.50 -18%
Dilution Solutions HM Digital pH Tester | 6in x 1.7in x .7in
Out of stock
$37.39 $49.95 -25%
Milwaukee Instruments pH600 Digital pH Pen
In stock
$29.94
Save 6%
Milwaukee Instruments pH 600 pH Tester w/1 Point Manual Calibration
In stock
$28.16 $30.00 -6%
Hanna EC Conductivity Calibration Solution | 1, 413 µS/cm
In stock
$24.30
Luster Leaf Rapitest Light & Moisture Meter | Dual Tester
In stock
$21.58 $29.99 -28%
Save 18%
GroStar pH Probe Maintanence Kit
In stock
$19.71 $23.99 -18%
Luster Leaf Rapitest Digital Soil pH Meter | Results From 3.5 - 9.0
In stock
$15.30 $21.29 -28%
SUNPACK 2-Function Plant Sensor Meter | 2-Function - Measures Soil Moisture & pH
In stock
$10.59 $13.49 -21%
Hydrofarm Active Air 3-Way Meter
In stock
$10.03 $14.99 -33%
Active Air 2-Way pH & Moisture Meter | 1ct
In stock
$9.06 $13.99 -35%
Active Air 2-Way Moisture/pH Meter
In stock
$8.11 $11.84 -32%
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