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Meters & Controllers

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128
Hydro Systems E-Dos Electric Pump Flow Meter Kit | with Clamp on Fittings
Out of stock
$2,774.95 $2,906.05 -5%
Aqua-X Pro Controller with AMP-3 Sensor Board,Free App
Out of stock
$2,537.23 $2,623.95 -3%
Bluelab Connect Pro Controller | Remote Monitoring of pH, EC and Temperature
Out of stock
$1,281.14
Aqua-X Plus Controller with AMP-3 Sensor Board,Free App
In Stock: 4
$1,278.20
Bluelab pH Controller | 6.5ft Probe Cable - Dose pH Up or pH Down
Out of stock
$685.91
Bluelab Connect pH Controller | for Bluelab Connect Devices
Out of stock
$680.07 $683.36
Bluelab Guardian Monitor Inline | Wi-Fi
In Stock: 14
$662.11
Sure Test Groguru Stem W/ 3 Sensors
In Stock: 18
$543.30 $1,095.00 -50%
Bluelab Guardian Monitor In-Line Connect | 10 ft In-line Probe Cable
Out of stock
$535.38 $550.38 -3%
Bluelab Guardian Monitor | Wi-Fi
Out of stock
$451.58
Bluelab Guardian Monitor Connect | 6.5ft Probe Cable
Out of stock
$425.73
Bluelab pH Testing Kit Bundle
In Stock: 10
$408.75 $545.00 -25%
Bluelab Combo Meter Plus | Measures pH, Conductivity & Temperature
In Stock: 23
$378.42
Bluelab Guardian Monitor | 6.5ft Probe Cable
Out of stock
$370.38 $375.38 -1%
Aqua-X Controller with Water Detector set, Free App
In Stock: 41
$335.64 $348.60 -4%
Bluelab Pulse Multimedia EC & MC Meter | Measures EC, Moisture & Temperature
In Stock: 34
$331.03
Active Aqua Grow Flow Ebb and Gro Controller Unit w/2 Pumps
In Stock: 109
$324.69 $389.33 -17%
Bluelab Combo Meter | 6.5ft Probe Cable
In Stock: 95
$314.63
Sure Test Groguru Base W/ Wifi
In Stock: 77
$301.85 $1,265.74 -76%
HM Digital Hydromaster - Continuous pH/TDS/EC/Temp meter
In Stock: 193
$296.79
HM Digital Hydromaster Portable - pH/TDS/EC/Temp
In Stock: 147
$273.17
Hydro-Logic Flow Meter 1 in NPT 3-30 GPM for BIGboy
Out of stock
$270.56 $367.45 -26%
Hanna pH, EC & TDS Tester | High Range
In Stock: 2
$266.69
Heavy Duty Nutrient EC+Temp Sensor drop-in/inline compatible
In Stock: 8
$224.67 $241.50 -7%
Water Content Sensor with Cable Set
In Stock: 31
$221.93 $241.50 -8%
Hm Digital Hydromaster - Continuous Ph/Tds/Ec/Temp Meter
In Stock: 231
$218.63 $289.95 -25%
GroStar GS2 Soil pH Pen
In Stock: 114
$214.32 $256.99 -17%
HM Digital 4 in 1 PH/EC/TDS/TEMP Combo
In Stock: 40
$209.36
Hm Digital Hydromaster Portable - Ph/Tds/Ec/Temp
In Stock: 218
$207.32 $274.95 -25%
Inline EC+Temp Sensor, Heavy Duty
In Stock: 5
$202.75 $219.45 -8%
Heavy Duty Nutrient pH Sensor, drop-in/in-line compatible
In Stock: 3
$202.75 $219.45 -8%
Bluelab Soil pH Pen
In Stock: 12
$199.69
Bluelab pH Probe Inline | 3/4in NPT Thread - Use with 1in Adapter
In Stock: 50
$198.23
Milwaukee Instruments MA871 Digital Brix Refractometer, Range 0-85%
In Stock: 408
$193.80 $199.00 -3%
Inline pH Sensor, Heavy Duty
In Stock: 4
$180.83 $197.40 -8%
HM Digital pH / TDS / EC / Temp meter
In Stock: 443
$171.38
HM Digital Pro Series Pen style ORP/Temp meter
In Stock: 13
$166.55
Bluelab Multimedia pH Meter | 6.5ft Probe Cable
In Stock: 113
$158.65 $255.74 -38%
GroStar GS2-E replacement Soil Spear pH electrode
In Stock: 89
$151.77 $181.99 -17%
GroStar GS4 pH/EC/500ppm/700ppm/Temp (5-in-1) Combo Pen
In Stock: 64
$149.27 $178.99 -17%
Bluelab Commercial Truncheon Nutrient Meter | Measures EC, CF, & PPM
In Stock: 25
$148.08
Hm Digital 4 In 1 Ph/Ec/Tds/Temp Combo
In Stock: 69
$143.23 $189.95 -25%
Bluelab Leap pH Probe | For Bluelab Combo Meter - Bluelab Combo Meter Plus - and Bluelab Multimedia pH Meters
In Stock: 178
$137.54
HM Digital pH / TDS / EC / Temp meter
In Stock: 563
$126.07 $181.17 -30%
Hanna GroLine Waterproof Hydroponic pH Tester
Out of stock
$119.60 $132.99 -10%
Bluelab pH Pen Meter | Measures pH and Temperature
In Stock: 353
$116.03
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%
Bluelab Truncheon Nutrient Meter V2 | 40cm L - 16 in. L
In Stock: 45
$100.97 $128.70 -22%
GroStar GS1 pH Pen
In Stock: 259
$99.72 $115.99 -14%
Bluelab Conductivity Pen Meter | Measures Conductivity and Temperature
In Stock: 89
$99.59
1" Digital Flow Meter
In Stock: 3
$97.26 $103.95 -6%
GroStar GS3 EC Pen
In Stock: 94
$95.06 $113.99 -17%
2-in-1 EC + Temp Sensor for Reservoir
In Stock: 3
$93.15 $100.28 -7%
Bluelab Connect Range Extender | for Bluelab Connect Devices and Connect Stick
In Stock: 11
$92.43 $202.71 -54%
Milwaukee Instruments EC40 PRO EC/TDS Nutrient Meter
In Stock: 82
$90.26 $95.00 -5%
Dilution Solutions Pro HM Digital pH Meter | 7.3in x 1.3in x 1.3in
In Stock: 338
$89.70 $99.95 -10%
Bluelab Connect Stick 2 | for Bluelab Connect Devices
In Stock: 170
$89.44 $147.11 -39%
Bluelab Combo Meter pH Replacement Probe | pH probe
In Stock: 336
$85.39
CYCO pH 4.0 Solution 1 Liter (Case of 12)
In Stock: 96
$83.24 $252.00 -67%
Hm Digital Pro Series Pen Style Orp/Temp Meter
In Stock: 28
$82.91 $109.95 -25%
pH Sensor for Reservoir
In Stock: 7
$80.82 $88.20 -8%
HM Digital Waterproof pH Meter
In Stock: 570
$78.73 $113.16 -30%
HM Digital Dual TDS Monitor (DM-3)
In Stock: 73
$78.45
HM Digital HydroMaster Portable/Wall Mount/Bench Continuous pH/EC/TDS/Temp
Out of stock
$76.32 $359.00 -79%
Aeromixer Aerobuddy Timer + Power Controller
In Stock: 59
$68.92 $79.00 -13%
Dilution Solutions HM Digital Meter | 7.3in x 1.3in x 1.3in
Out of stock
$67.26 $74.95 -10%
GroStar GS4-E replacement pH/EC combo electrode
In Stock: 82
$66.71 $79.99 -17%
Blumat Digital Moisture Meter | 12in
Out of stock
$124.60 / $62.30 per unit
(minimum purchase of 2)
HM Digital LeakBlock Sensor
In Stock: 22
$59.40
HM Digital Replacement pH sensor for HM-500/ HM-200
In Stock: 14
$58.88
Hydro-Logic Flowmaster Flow Meter 3/8 In
In Stock: 1
$58.46 $84.02 -30%
Hydro-Logic TDS Pro White in/out PPM monitor with 1/2" in & 3/8" out
In Stock: 37
$56.57 $82.95 -32%
Bluelab pH Probe KCl Storage Solution 120 ml (Case of 6)
Out of stock
$54.91 $88.20 -38%
Hm Digital Dual Tds Monitor (Dm-3)
In Stock: 94
$50.48 $66.95 -25%
Gardena Smart Flow Water Meter
Out of stock
$49.19 $58.99 -17%
HM Digital Replacement TDS/EC sensor for HM-200
In Stock: 10
$48.17
Bluelab 2.77EC Conductivity Solutions | 18ml
Out of stock
$47.38
Bluelab 4.0 Calibration Solutions | 18ml
In Stock: 1
$47.38
Bluelab 7.0 Calibration Solutions | 18ml
In Stock: 2
$47.38
Bluelab Calibration KCl storage solution | 18ml
Out of stock
$47.38
Bluelab Mix Calibration Solutions
Out of stock
$47.38
GroStar GS3-E replacement EC electrode
In Stock: 100
$45.02 $53.99 -17%
GroStar GS1-E replacement pH electrode
In Stock: 78
$42.52 $50.99 -17%
HM Digital Hydromaster Replacement EC/TDS Probe
Out of stock
$41.69 $49.99 -17%
Hm Digital Replacement Ph Sensor For Hm-500/ Hm-200
In Stock: 16
$41.44 $54.95 -25%
GARDENA Water Smart Flow Meter | Measures in Gallons or Liters
In Stock: 78
$158.60 / $39.65 per unit
(minimum purchase of 4)
HM Digital PH-80 pH/Temperature Meter
In Stock: 84
$38.81 $46.50 -17%
Dilution Solutions HM Digital pH Tester | 6in x 1.7in x .7in
Out of stock
$37.74 $49.95 -24%
Hm Digital Leakblock Sensor
In Stock: 38
$37.67 $49.95 -25%
HM Digital COM-80 EC/TDS/Temp Waterproof Hydro Tester
In Stock: 16
$35.82 $42.95 -17%
Milwaukee Instruments pH600 Digital pH Pen
In Stock: 287
$35.55
Dilution Solutions HM Digital EC Tester | 6in x 1.7in x .7in
Out of stock
$34.81 $39.95 -13%
Hm Digital Replacement Ph Sensor For Ph-200/Com-360
In Stock: 16
$33.90 $44.95 -25%
Hm Digital Replacement Tds/Ec Sensor For Hm-200
In Stock: 23
$33.90 $44.95 -25%
Bluelab Guardian Power Supply International
Out of stock
$33.70
Milwaukee Instruments pH 600 pH Tester w/1 Point Manual Calibration
In Stock: 86
$33.25 $35.00 -5%
HM Digital Replacement pH Sensor Probe for HM-500
Out of stock
$32.80 $59.99 -45%
HM Digital pH 80 Meter
In Stock: 299
$32.54 $46.76 -30%
Hanna Electrode Storage Solution
In Stock: 3
$31.74
Bluelab Probe Care Kit | for Bluelab pH & Conductivity Probes
In Stock: 66
$31.55
Alchemist pH Down Non-Corrosive Gallon
In Stock: 116
$30.57 $53.20 -43%
HM Digital pH 4.0 buffer solution - 20 packets of 20 ml
In Stock: 93
$26.74
Hydrofarm Electronic Water Timer
In Stock: 1131
$26.26 $31.49 -17%
Hanna 4.01 pH Buffer Solution | 500ml
In Stock: 15
$25.39
Hanna 7.01 pH Buffer Solution | 500ml
In Stock: 13
$25.39
Hanna EC Conductivity Calibration Solution | 1, 413 µS/cm
In Stock: 6
$25.39
Bluelab pH Probe KCl Storage Solution | 250ml
In Stock: 346
$147.96 / $24.66 per unit
(minimum purchase of 6)
Bluelab Probe Care Kit | for Bluelab pH Probes
In Stock: 15
$24.61
GroStar pH calibration kit (pH 4/7/10, 8 oz. each)
In Stock: 29
$24.17 $28.99 -17%
HM Digital TDS-3 Handheld TDS meter
In Stock: 31
$23.42 $33.99 -31%
Hanna General-Purpose Cleaning Solution | 230ml
In Stock: 4
$22.72 $25.26 -10%
Bluelab Meter Carrying Case | Meter Not Included
In Stock: 169
$22.58 $29.08 -22%
Dilution Solutions PH Calibration Solution | 20pcs
In Stock: 99
$22.41 $24.95 -10%
HM Digital Handheld TDS-3 Tester
Out of stock
$20.83
Luster Leaf Rapitest Light & Moisture Meter | Dual Tester
In Stock: 104
$122.88 / $20.48 per unit
(minimum purchase of 6)
GroStar pH Probe Maintanence Kit
In Stock: 76
$20.00 $23.99 -17%
Bluelab Conductivity Standard Solution | 500mL- 2.77 EC - Designed for Bluelab Products
In Stock: 137
$119.46 / $19.91 per unit
(minimum purchase of 6)
Bluelab pH 4.0 Calibration Solutions | 500mL- Designed for Bluelab Products
In Stock: 575
$118.62 / $19.77 per unit
(minimum purchase of 6)
Bluelab pH 7.0 Calibration Solutions | 500mL- Designed for Bluelab Products
In Stock: 675
$118.62 / $19.77 per unit
(minimum purchase of 6)
Mosser Lee Soil Master Moisture, Light & pH Meter | With Light
Out of stock
$227.88 / $18.99 per unit
(minimum purchase of 12)
Hm Digital Ph 7.0 Buffer Solution - 20 Packets Of 20 Ml
In Stock: 191
$18.82 $24.95 -25%
Hm Digital Ph 4.0 Buffer Solution - 20 Packets Of 20 Ml
In Stock: 248
$18.82 $24.95 -25%
Bluelab Probe Care Kit | for Bluelab Conductivity Probes
In Stock: 9
$17.74
P3 International Save a Drop Water Meter
In Stock: 3123
$16.64 $19.95 -17%
Mosser Lee Soil Master Moisture Meter Soil Master
Out of stock
$197.88 / $16.49 per unit
(minimum purchase of 12)
GroStar pH calibration kit (pH 4/7, 8 oz. each)
In Stock: 126
$15.83 $18.99 -17%
Bluelab Conductivity Standard Solution | 120ml - 2.77EC
In Stock: 206
$88.86 / $14.81 per unit
(minimum purchase of 6)
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