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Probes & Meters

  • iPower 5 Pack 2FT 6400K 24W T5 Fluorescent Grow Lamp Light Bulbs

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $7.17
    $7.17 - $7.17
    Current price $7.17

    ✔Package Includes: 5 Packs T5 HO Fluorescent Grow Light Bulbs of 24W Each ✔Color Temperature: 6400K. Cool spectrum for vegetative growing ✔Lumen: 2...

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    Original price $0.00 - Original price $0.00
    Original price $0.00
    $7.17
    $7.17 - $7.17
    Current price $7.17
  • Soil pH Meter, 3-in-1 Soil Test Kit for Moisture & Light & pH, iPower

    Original price $4.20 - Original price $4.20
    Original price
    $4.20
    $4.20 - $4.20
    Current price $4.20

    A 3-in-1 soil test meter that takes the guesswork out of gardening The iPower 3-in-1 Soil Meter is three meters in one device. With our soil pH met...

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    Original price $4.20 - Original price $4.20
    Original price
    $4.20
    $4.20 - $4.20
    Current price $4.20
  • HM Digital Handheld TDS-3 Tester

    Original price $30.22
    Original price $30.22 - Original price $30.22
    Original price $30.22
    Current price $15.08
    $15.08 - $15.08
    Current price $15.08

    Ideal for commercial use. Includes a carrying case with belt clip. Highly efficient and accurate due to its advanced microprocessor technology. Hol...

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    Original price $30.22
    Original price $30.22 - Original price $30.22
    Original price $30.22
    Current price $15.08
    $15.08 - $15.08
    Current price $15.08
  • iPower High Accuracy Pocket Size Portable pH Meter pH Tester

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $4.70
    $4.70 - $4.70
    Current price $4.70

    Digital PH Meter Water Tester This pH meter is affordable and useful for those who need a PH tester for household and laboratory use. Its not only ...

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    Original price $0.00 - Original price $0.00
    Original price $0.00
    $4.70
    $4.70 - $4.70
    Current price $4.70
  • iPower 5 Pack 2FT 2700K 24W T5 Fluorescent Grow Lamp Light Bulbs

    Original price $7.29 - Original price $7.29
    Original price
    $7.29
    $7.29 - $7.29
    Current price $7.29

    ✔Package Includes: 5 Packs T5 HO Fluorescent Grow Light Bulbs of 24W Each ✔Color Temperature: 2700K. Warm spectrum for flower production ✔Lumen: 22...

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    Original price $7.29 - Original price $7.29
    Original price
    $7.29
    $7.29 - $7.29
    Current price $7.29
  • Out of Stock

    HortiCare Nutrient Check PPM

    Original price $62.16 - Original price $62.16
    Original price
    $62.16
    $62.16 - $62.16
    Current price $62.16

    Original price $62.16 - Original price $62.16
    Original price
    $62.16
    $62.16 - $62.16
    Current price $62.16
    Out of Stock
  • FALSE

    Bluelab pH Controller

    Original price $740.94
    Original price $740.94 - Original price $740.94
    Original price $740.94
    Current price $481.63
    $481.63 - $481.63
    Current price $481.63

    Hands-free monitoring and dosing of solution pH levels. Our clever pH controller automatically monitors and fine-tunes the pH levels for you. You s...

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    Original price $740.94
    Original price $740.94 - Original price $740.94
    Original price $740.94
    Current price $481.63
    $481.63 - $481.63
    Current price $481.63
  • Out of Stock

    HM Digital Aquapro TDS Water Tester

    Original price $25.80 - Original price $25.80
    Original price
    $25.80
    $25.80 - $25.80
    Current price $25.80

    Original price $25.80 - Original price $25.80
    Original price
    $25.80
    $25.80 - $25.80
    Current price $25.80
    Out of Stock
  • Bluelab Guardian Connect

    Original price $507.74
    Original price $507.74 - Original price $507.74
    Original price $507.74
    Current price $330.04
    $330.04 - $330.04
    Current price $330.04

    The Bluelab Guardian Monitor Connect is not only a constant indicator of the desired levels of pH, conductivity and temperature of your nutrient so...

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    Original price $507.74
    Original price $507.74 - Original price $507.74
    Original price $507.74
    Current price $330.04
    $330.04 - $330.04
    Current price $330.04
  • Bluelab Original Truncheon Meter

    Original price $157.94
    Original price $157.94 - Original price $157.94
    Original price $157.94
    Current price $102.66
    $102.66 - $102.66
    Current price $102.66

    With its super tough, high quality, fully waterproof design, no calibration required, daylight readable blue LED's and no on/off buttons to worry a...

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    Original price $157.94
    Original price $157.94 - Original price $157.94
    Original price $157.94
    Current price $102.66
    $102.66 - $102.66
    Current price $102.66
  • Out of Stock

    Bluelab pH Meter

    Original price $170.27 - Original price $170.27
    Original price
    $170.27
    $170.27 - $170.27
    Current price $170.27

    The Bluelab pH Meter is used to accurately measure the pH value of a solution. Simply place the pH probe into the solution and the reading will b...

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    Original price $170.27 - Original price $170.27
    Original price
    $170.27
    $170.27 - $170.27
    Current price $170.27
    Out of Stock
  • Bluelab Commercial Truncheon Meter

    Original price $157.94
    Original price $157.94 - Original price $157.94
    Original price $157.94
    Current price $102.66
    $102.66 - $102.66
    Current price $102.66

    With a conductivity range right up to 6.0 EC (60 CF, 3000 ppm x 500 and 4200 ppm x 700), it will never leave you short. The Bluelab Commercial Trun...

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    Original price $157.94
    Original price $157.94 - Original price $157.94
    Original price $157.94
    Current price $102.66
    $102.66 - $102.66
    Current price $102.66
  • FALSE
    Out of Stock

    HM Digital pH - TDS - EC - Temp meter

    Original price $172.94
    Original price $172.94 - Original price $172.94
    Original price $172.94
    Current price $103.74
    $103.74 - $103.74
    Current price $103.74

    Original price $172.94
    Original price $172.94 - Original price $172.94
    Original price $172.94
    Current price $103.74
    $103.74 - $103.74
    Current price $103.74
    Out of Stock
  • Out of Stock

    Future Harvest Grow Boss - Nutrient Monitor

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $224.98
    $224.98 - $224.98
    Current price $224.98

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $224.98
    $224.98 - $224.98
    Current price $224.98
    Out of Stock
  • FALSE
    Out of Stock

    HM Digital Hydromaster Portable

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $224.99
    $224.99 - $224.99
    Current price $224.99

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $224.99
    $224.99 - $224.99
    Current price $224.99
    Out of Stock
  • FALSE
    Out of Stock

    24-7 pH Replacement Probe

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $34.99
    $34.99 - $34.99
    Current price $34.99

    A great all around meter for nutrient applications needing constant monitoring. It measures PPM, pH and Temperature. Its large illuminated green LC...

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    Original price $0.00 - Original price $0.00
    Original price $0.00
    $34.99
    $34.99 - $34.99
    Current price $34.99
    Out of Stock
  • Out of Stock

    HM Digital HydroMaster HM-500

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $248.99
    $248.99 - $248.99
    Current price $248.99

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $248.99
    $248.99 - $248.99
    Current price $248.99
    Out of Stock
  • Out of Stock

    Milwaukee MC720 pH Controller w- Dosing Pump Kit

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $259.99
    $259.99 - $259.99
    Current price $259.99

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $259.99
    $259.99 - $259.99
    Current price $259.99
    Out of Stock
  • Out of Stock

    Bluelab Soil pH Replacement Probe

    Original price $82.05 - Original price $82.05
    Original price
    $82.05
    $82.05 - $82.05
    Current price $82.05

    Original price $82.05 - Original price $82.05
    Original price
    $82.05
    $82.05 - $82.05
    Current price $82.05
    Out of Stock
  • Out of Stock

    Oakton Replacement Electrode pH 10-20-30

    Original price $78.64 - Original price $78.64
    Original price
    $78.64
    $78.64 - $78.64
    Current price $78.64

    Original price $78.64 - Original price $78.64
    Original price
    $78.64
    $78.64 - $78.64
    Current price $78.64
    Out of Stock
  • Out of Stock

    Oakton Waterproof pHTestr 30

    Original price $126.25 - Original price $126.25
    Original price
    $126.25
    $126.25 - $126.25
    Current price $126.25

    Original price $126.25 - Original price $126.25
    Original price
    $126.25
    $126.25 - $126.25
    Current price $126.25
    Out of Stock
  • FALSE
    Out of Stock

    Sure Test Commercial Lab Meter Replacement EC - TDS Probe

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $36.99
    $36.99 - $36.99
    Current price $36.99

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $36.99
    $36.99 - $36.99
    Current price $36.99
    Out of Stock
  • FALSE
    Out of Stock

    Sure Test Commercial Lab Meter Replacement pH Probe

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $29.99
    $29.99 - $29.99
    Current price $29.99

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $29.99
    $29.99 - $29.99
    Current price $29.99
    Out of Stock
  • Out of Stock

    Sure Test GroGuru Stem w- 1 Sensor

    Original price $217.93 - Original price $217.93
    Original price
    $217.93
    $217.93 - $217.93
    Current price $217.93

    Original price $217.93 - Original price $217.93
    Original price
    $217.93
    $217.93 - $217.93
    Current price $217.93
    Out of Stock
  • FALSE
    Out of Stock

    Sure Test Commercial Lab Meter Replacement ORP Probe

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $58.99
    $58.99 - $58.99
    Current price $58.99

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $58.99
    $58.99 - $58.99
    Current price $58.99
    Out of Stock
  • FALSE
    Out of Stock

    Sure Test Pro pH Pen Replacement Probe

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $22.99
    $22.99 - $22.99
    Current price $22.99

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $22.99
    $22.99 - $22.99
    Current price $22.99
    Out of Stock
  • FALSE
    Out of Stock

    Sure Test Commercial Replacement EC Probe

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $23.99
    $23.99 - $23.99
    Current price $23.99

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $23.99
    $23.99 - $23.99
    Current price $23.99
    Out of Stock
  • FALSE
    Out of Stock

    Sure Test Commercial Replacement DO Probe

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $42.99
    $42.99 - $42.99
    Current price $42.99

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $42.99
    $42.99 - $42.99
    Current price $42.99
    Out of Stock
  • FALSE
    Out of Stock

    Sure Test Commercial Replacement pH Probe

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $23.99
    $23.99 - $23.99
    Current price $23.99

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $23.99
    $23.99 - $23.99
    Current price $23.99
    Out of Stock
  • FALSE
    Out of Stock

    Nutradip Grow Boss TDS Replacement Probe

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $51.28
    $51.28 - $51.28
    Current price $51.28

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $51.28
    $51.28 - $51.28
    Current price $51.28
    Out of Stock
  • FALSE
    Out of Stock

    HM Digital Replacement pH Sensor

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $40.19
    $40.19 - $40.19
    Current price $40.19

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $40.19
    $40.19 - $40.19
    Current price $40.19
    Out of Stock
  • Out of Stock

    Oakton EcoTester CTS Pocket Conductivity, Salinity, and TDS Meter

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $81.99
    $81.99 - $81.99
    Current price $81.99

    Oakton® Conductivity, TDS and Salinity in one meter. Expanded 4-digit dual-line display shows conductivity and temperature readings simultaneously....

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    Original price $0.00 - Original price $0.00
    Original price $0.00
    $81.99
    $81.99 - $81.99
    Current price $81.99
    Out of Stock
  • Out of Stock

    Agrowtek Liquid Tight Gland Kit for Hydro Sensor Probes

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $12.16
    $12.16 - $12.16
    Current price $12.16

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $12.16
    $12.16 - $12.16
    Current price $12.16
    Out of Stock
  • Out of Stock

    Agrowtek Temperature Probe

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $47.84
    $47.84 - $47.84
    Current price $47.84

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $47.84
    $47.84 - $47.84
    Current price $47.84
    Out of Stock
  • Out of Stock

    Agrowtek pH Probe

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $96.49
    $96.49 - $96.49
    Current price $96.49

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $96.49
    $96.49 - $96.49
    Current price $96.49
    Out of Stock
  • Out of Stock

    Agrowtek Grow Control Hydro Sensor Kit w- Probes (pH-EC-Temp)

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $485.68
    $485.68 - $485.68
    Current price $485.68

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $485.68
    $485.68 - $485.68
    Current price $485.68
    Out of Stock
  • Out of Stock

    Agrowtek EC Probe

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $120.81
    $120.81 - $120.81
    Current price $120.81

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $120.81
    $120.81 - $120.81
    Current price $120.81
    Out of Stock
  • Dosatron Nutrient Delivery System - EC (PPM) - pH - Temp Monitor Kit

    Original price $1,245.11
    Original price $1,245.11 - Original price $1,245.11
    Original price $1,245.11
    Current price $917.24
    $917.24 - $917.24
    Current price $917.24

    Original price $1,245.11
    Original price $1,245.11 - Original price $1,245.11
    Original price $1,245.11
    Current price $917.24
    $917.24 - $917.24
    Current price $917.24
  • Out of Stock

    Oakton Multi PT Testr 35 - PH-TDS-Temp

    Original price $150.37 - Original price $150.37
    Original price
    $150.37
    $150.37 - $150.37
    Current price $150.37

    Original price $150.37 - Original price $150.37
    Original price
    $150.37
    $150.37 - $150.37
    Current price $150.37
    Out of Stock
  • Out of Stock

    Oakton Waterproof pHTestr 10

    Original price $104.25 - Original price $104.25
    Original price
    $104.25
    $104.25 - $104.25
    Current price $104.25

    Original price $104.25 - Original price $104.25
    Original price
    $104.25
    $104.25 - $104.25
    Current price $104.25
    Out of Stock

Probes & Meters and Green Houses Benefits

With a simple test using the best hydroponic pH meter, you can determine if your plants need water or pH adjustment or more of a nutrient, if you have the right hydroponic meters to measure different parameters. The best pH meter for hydroponics and probes to measure pH, TDS, temperature, EC and humidity can be found at Zenhydro. Pick a hydro pH meter or EC pH meter hydroponics from brands such as Hanna Instruments, HM Digital and Blue Lab.