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Meters & Controllers

Bluelab Guardian Monitor | 6.5ft Probe Cable
Out of stock
$435.91 $555.70 -22%
Bluelab pH Pen Meter | Measures pH and Temperature
In Stock: 321
$136.55 $172.35 -21%
SUNPACK 2-Function Plant Sensor Meter | 2-Function - Measures Soil Moisture & pH
In Stock: 220
$130.50 / $13.05 per unit
(minimum purchase of 10)
Luster Leaf Rapitest Digital Soil pH Meter | Results From 3.5 - 9.0
In Stock: 288
$230.52 / $19.21 per unit
(minimum purchase of 12)
GroStar pH Probe Maintanence Kit
In Stock: 76
$20.00 $23.99 -17%
Milwaukee Instruments pH600 Digital pH Pen
In Stock: 287
$35.55
Bluelab Combo Meter pH Replacement Probe | pH probe
In Stock: 395
$100.49 $126.85 -21%
Bluelab pH Probe Inline | 3/4in NPT Thread - Use with 1in Adapter
In Stock: 41
$233.31 $288.16 -19%
Bluelab pH 7.0 Calibration Solutions | 500mL- Designed for Bluelab Products
In Stock: 159
$139.56 / $23.26 per unit
(minimum purchase of 6)
Bluelab Commercial Truncheon Nutrient Meter | Measures EC, CF, & PPM
In Stock: 25
$174.28 $213.70 -18%
Bluelab Conductivity Pen Meter | Measures Conductivity and Temperature
In Stock: 91
$117.21 $144.77 -19%
Dilution Solutions HM Digital pH Tester | 6in x 1.7in x .7in
Out of stock
$41.85 $49.95 -16%
HM Digital Replacement pH Sensor Probe for HM-500
Out of stock
$32.80 $59.99 -45%
Bluelab pH 7.0 Calibration Solutions | 250ml - Designed for Bluelab Products
In Stock: 609
$75.84 / $12.64 per unit
(minimum purchase of 6)
Bluelab Probe Care Kit | for Bluelab pH Probes
In Stock: 18
$28.36 $34.48 -18%
Bluelab Probe Care Kit | for Bluelab Conductivity Probes
In Stock: 9
$20.43 $24.83 -18%
Bluelab Combo Meter Plus | Measures pH, Conductivity & Temperature
In Stock: 22
$445.38 $550.11 -19%
Active Air 3-Way Meter
In Stock: 74
$8.88 $13.09 -32%
P3 International Save a Drop Water Meter
In Stock: 3123
$16.64 $19.95 -17%
Bluelab pH Controller | 6.5ft Probe Cable - Dose pH Up or pH Down
Out of stock
$778.86
GroStar GS4 pH/EC/500ppm/700ppm/Temp (5-in-1) Combo Pen
In Stock: 64
$149.27 $178.99 -17%
Bluelab Leap pH Probe | For Bluelab Combo Meter - Bluelab Combo Meter Plus - and Bluelab Multimedia pH Meters
In Stock: 171
$161.87 $199.92 -19%
Bluelab Multimedia pH Meter | 6.5ft Probe Cable
In Stock: 113
$173.30 $255.74 -32%
Bluelab Guardian Monitor Connect | 6.5ft Probe Cable
Out of stock
$501.06 $620.47 -19%
Bluelab Pulse Multimedia EC & MC Meter | Measures EC, Moisture & Temperature
In Stock: 36
$389.59 $481.18 -19%
Hort2O Digital Hygro-Thermometer | 9.8ft Temperature Sensor - Digital Display - Measures Temperatures 32°F to 122°F - Measures Humidity 20% to 98%
In Stock: 134
$19.92 $19.99
Luster Leaf Rapitest Light & Moisture Meter | Dual Tester
In Stock: 104
$162.60 / $27.10 per unit
(minimum purchase of 6)
Bluelab Combo Meter | 6.5ft Probe Cable
In Stock: 90
$370.29 $467.38 -21%
GroStar GS2 Soil pH Pen
In Stock: 114
$214.32 $256.99 -17%
Bluelab Soil pH Pen
In Stock: 12
$235.02 $288.16 -18%
SUNPACK Tri-Meter Moisture, Light & pH | Measures Moisture, Light & pH
In Stock: 20
$132.90 / $13.29 per unit
(minimum purchase of 10)
Hanna GroLine Waterproof Hydroponic pH Tester
Out of stock
$136.99 $139.99 -2%
Bluelab Conductivity Standard Solution | 250ml - 2.77 EC - Designed for Bluelab Products
In Stock: 174
$77.04 / $12.84 per unit
(minimum purchase of 6)
Bluelab Truncheon Nutrient Meter V2 | 40cm L - 16 in. L
In Stock: 40
$116.08 $143.38 -19%
Milwaukee Instruments MA871 Digital Brix Refractometer, Range 0-85%
In Stock: 408
$193.80 $199.00 -3%
Active Air 2-Way Moisture/pH Meter
In Stock: 1018
$8.41 $11.84 -29%
Bluelab pH 4.0 Calibration Solutions | 500mL- Designed for Bluelab Products
In Stock: 120
$139.56 / $23.26 per unit
(minimum purchase of 6)
Bluelab Conductivity Standard Solution | 120ml - 2.77EC
In Stock: 189
$104.52 / $17.42 per unit
(minimum purchase of 6)
Active Air 2-Way pH & Moisture Meter | 1ct
In Stock: 13
$10.47 $13.99 -25%
Bluelab pH 4.0 Calibration Solution | 250ml - Designed for Bluelab Products
In Stock: 458
$75.84 / $12.64 per unit
(minimum purchase of 6)
Blumat Digital Moisture Meter | 12in
Out of stock
$166.78 / $83.39 per unit
(minimum purchase of 2)
Milwaukee Instruments pH 600 pH Tester w/1 Point Manual Calibration
In Stock: 86
$33.25 $35.00 -5%
Active Aqua Grow Flow Ebb and Gro Controller Unit w/2 Pumps
In Stock: 109
$324.69 $389.33 -17%
Bluelab Conductivity Standard Solution | 500mL- 2.77 EC - Designed for Bluelab Products
In Stock: 89
$140.58 / $23.43 per unit
(minimum purchase of 6)
Dilution Solutions Pro HM Digital pH Meter | 7.3in x 1.3in x 1.3in
In Stock: 338
$99.50 $99.95
Bluelab Connect Stick 2 | for Bluelab Connect Devices
In Stock: 170
$97.70 $147.11 -34%
HM Digital PH-80 pH/Temperature Meter
In Stock: 44
$38.81 $46.50 -17%
Dilution Solutions HM Digital/EC Calibration Solution | 1000 PPM
In Stock: 29
$8.92 $8.95
HM Digital 1000 ppm TDS Calibration Solution, 3 oz (90 ml)
In Stock: 86
$7.91 $9.49 -17%
Bluelab pH Probe KCl Storage Solution | 250ml
In Stock: 286
$174.12 / $29.02 per unit
(minimum purchase of 6)
GroStar pH calibration kit (pH 4/7, 8 oz. each)
In Stock: 126
$15.83 $18.99 -17%
Bluelab Meter Carrying Case | Meter Not Included
In Stock: 169
$24.14 $29.08 -17%
Hanna EC Conductivity Calibration Solution | 1, 413 µS/cm
In Stock: 5
$27.39 $27.99 -2%
GroStar GS3 EC Pen
In Stock: 94
$95.06 $113.99 -17%
GroStar GS1 pH Pen
In Stock: 259
$99.72 $115.99 -14%
HM Digital TDS-3 Handheld TDS meter
In Stock: 31
$23.42 $33.99 -31%
Aeromixer Aerobuddy Timer + Power Controller
In Stock: 59
$80.14
Hanna pH, EC & TDS Tester | High Range
In Stock: 2
$287.69 $293.99 -2%
GroStar GS4-E replacement pH/EC combo electrode
In Stock: 82
$66.71 $79.99 -17%
GroStar GS2-E replacement Soil Spear pH electrode
In Stock: 89
$151.77 $181.99 -17%
HM Digital HydroMaster Portable/Wall Mount/Bench Continuous pH/EC/TDS/Temp
Out of stock
$76.32 $359.00 -79%
Hydro Systems E-Dos Electric Pump Flow Meter Kit | with Clamp on Fittings
Out of stock
$2,993.45 $3,059.00 -2%
Dilution Solutions EC Calibration Solution | 20pc Box
In Stock: 225
$10.18 $24.95 -59%
Bluelab Connect Range Extender | for Bluelab Connect Devices and Connect Stick
In Stock: 11
$100.96 $202.71 -50%
Milwaukee Instruments EC40 PRO EC/TDS Nutrient Meter
In Stock: 82
$90.26 $95.00 -5%
Bluelab Guardian Monitor In-Line Connect | 10 ft In-line Probe Cable
Out of stock
$630.11 $814.77 -23%
Hydrofarm Electronic Water Timer
In Stock: 1131
$26.26 $31.49 -17%
GroStar pH calibration kit (pH 4/7/10, 8 oz. each)
In Stock: 29
$24.17 $28.99 -17%
GroStar GS1-E replacement pH electrode
In Stock: 78
$42.52 $50.99 -17%
Milwaukee Instruments pH 4.01 Calibration Solution, 230 ml
In Stock: 83
$13.21 $13.90 -5%
Bluelab Connect Pro Controller | Remote Monitoring of pH, EC and Temperature
Out of stock
$1,475.99 $1,812.17 -19%
Milwaukee Instruments pH 7.01 Solution, 230 ml
In Stock: 185
$13.21 $13.90 -5%
Dilution Solutions PH Calibration Solution | 20pcs
In Stock: 99
$24.85 $24.95
Bluelab Probe Care Kit | for Bluelab pH & Conductivity Probes
In Stock: 65
$37.12 $45.51 -18%
Dilution Solutions HM Digital EC Tester | 6in x 1.7in x .7in
Out of stock
$38.61 $39.95 -3%
HM Digital Hydromaster Replacement EC/TDS Probe
Out of stock
$41.69 $49.99 -17%
GroStar GS3-E replacement EC electrode
In Stock: 100
$45.02 $53.99 -17%
Plastair Wrox Color Change Moisture Indicator | 3pc
Out of stock
$83.04 / $6.92 per unit
(minimum purchase of 12)
Hanna Electrode Storage Solution
In Stock: 3
$34.24 $34.99 -2%
HM Digital COM-80 EC/TDS/Temp Waterproof Hydro Tester
In Stock: 16
$35.82 $42.95 -17%
Hydrofarm Active Air 3-Way Meter
In Stock: 51
$11.59 $14.99 -23%
1" Digital Flow Meter
In Stock: 3
$97.26 $103.95 -6%
GroStar EC Calibration Kit (2.77 EC, 8 oz. each)
In Stock: 102
$12.50 $14.99 -17%
Hanna 7.01 pH Buffer Solution | 500ml
In Stock: 7
$27.39 $27.99 -2%
HM Digital PH-STOR pH Electrode Storage Solution
In Stock: 41
$7.08 $8.49 -17%
Hanna General-Purpose Cleaning Solution | 230ml
In Stock: 4
$26.02 $26.59 -2%
Dilution Solutions PH Storage Solution | 60cc
Out of stock
$7.93 $7.95
Hanna 4.01 pH Buffer Solution | 500ml
In Stock: 10
$27.39 $27.99 -2%
Dilution Solutions HM Digital Meter | 7.3in x 1.3in x 1.3in
Out of stock
$74.61 $74.95
1.5" Digital Flow Meter
In Stock: 9
$108.22 $115.50 -6%
1.25" Digital Flow Meter
In Stock: 8
$102.74 $110.25 -7%
Water Content Sensor with Cable Set
In Stock: 31
$221.93 $241.50 -8%
2-in-1 EC + Temp Sensor for Reservoir
In Stock: 3
$93.15 $100.28 -7%
Aqua-X Plus Controller with AMP-3 Sensor Board,Free App
In Stock: 3
$1,278.20
Aqua-X Pro Controller with AMP-3 Sensor Board,Free App
Out of stock
$2,537.23 $2,623.95 -3%
Aqua-X Controller with Water Detector set, Free App
In Stock: 41
$335.64 $348.60 -4%
Heavy Duty Nutrient pH Sensor, drop-in/in-line compatible
In Stock: 3
$202.75 $219.45 -8%
pH Sensor for Reservoir
In Stock: 7
$80.82 $88.20 -8%
Inline pH Sensor, Heavy Duty
In Stock: 4
$180.83 $197.40 -8%
Heavy Duty Nutrient EC+Temp Sensor drop-in/inline compatible
In Stock: 8
$224.67 $241.50 -7%
Inline EC+Temp Sensor, Heavy Duty
In Stock: 5
$202.75 $219.45 -8%
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