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Probes & Meters

  • Out of Stock

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

    $0.00 - $0.00
    $0.00
    $7.17
    $7.17 - $7.17
    $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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    $0.00 - $0.00
    $0.00
    $7.17
    $7.17 - $7.17
    $7.17
    Out of Stock

  • Soil pH Meter, 3-in-1 Soil Test Kit for Moisture & Light & pH, iPower

    $4.20 - $4.20
    $4.20
    $4.20 - $4.20
    $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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    $4.20 - $4.20
    $4.20
    $4.20 - $4.20
    $4.20
  • Out of Stock

    iPower High Accuracy Pocket Size Portable pH Meter pH Tester

    $0.00 - $0.00
    $0.00
    $4.70
    $4.70 - $4.70
    $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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    $0.00 - $0.00
    $0.00
    $4.70
    $4.70 - $4.70
    $4.70
    Out of Stock
  • Out of Stock

    HM Digital Handheld TDS-3 Tester

    $30.22
    $30.22 - $30.22
    $30.22
    $20.15
    $20.15 - $20.15
    $20.15

    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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    $30.22
    $30.22 - $30.22
    $30.22
    $20.15
    $20.15 - $20.15
    $20.15
    Out of Stock
  • Out of Stock

    iPower 5 Pack 2FT 2700K 24W T5 Fluorescent Grow Lamp Light Bulbs

    $7.29 - $7.29
    $7.29
    $7.29 - $7.29
    $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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    $7.29 - $7.29
    $7.29
    $7.29 - $7.29
    $7.29
    Out of Stock
  • Out of Stock

    HortiCare Nutrient Check PPM

    $62.16 - $62.16
    $62.16
    $62.16 - $62.16
    $62.16

    $62.16 - $62.16
    $62.16
    $62.16 - $62.16
    $62.16
    Out of Stock
  • FALSE
    Out of Stock

    Bluelab pH Controller

    $740.94
    $740.94 - $740.94
    $740.94
    $482.88
    $482.88 - $482.88
    $482.88

    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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    $740.94
    $740.94 - $740.94
    $740.94
    $482.88
    $482.88 - $482.88
    $482.88
    Out of Stock
  • Out of Stock

    HM Digital Aquapro TDS Water Tester

    $25.80 - $25.80
    $25.80
    $25.80 - $25.80
    $25.80

    $25.80 - $25.80
    $25.80
    $25.80 - $25.80
    $25.80
    Out of Stock
  • Out of Stock

    Bluelab Guardian Connect

    $507.74
    $507.74 - $507.74
    $507.74
    $330.90
    $330.90 - $330.90
    $330.90

    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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    $507.74
    $507.74 - $507.74
    $507.74
    $330.90
    $330.90 - $330.90
    $330.90
    Out of Stock
  • Out of Stock

    Bluelab Original Truncheon Meter

    $157.94
    $157.94 - $157.94
    $157.94
    $102.93
    $102.93 - $102.93
    $102.93

    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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    $157.94
    $157.94 - $157.94
    $157.94
    $102.93
    $102.93 - $102.93
    $102.93
    Out of Stock
  • Out of Stock

    Bluelab pH Meter

    $170.27 - $170.27
    $170.27
    $170.27 - $170.27
    $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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    $170.27 - $170.27
    $170.27
    $170.27 - $170.27
    $170.27
    Out of Stock
  • Out of Stock

    Bluelab Commercial Truncheon Meter

    $157.94
    $157.94 - $157.94
    $157.94
    $102.93
    $102.93 - $102.93
    $102.93

    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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    $157.94
    $157.94 - $157.94
    $157.94
    $102.93
    $102.93 - $102.93
    $102.93
    Out of Stock
  • FALSE
    Out of Stock

    HM Digital pH - TDS - EC - Temp meter

    $172.94
    $172.94 - $172.94
    $172.94
    $138.62
    $138.62 - $138.62
    $138.62

    $172.94
    $172.94 - $172.94
    $172.94
    $138.62
    $138.62 - $138.62
    $138.62
    Out of Stock
  • Out of Stock

    Future Harvest Grow Boss - Nutrient Monitor

    $0.00 - $0.00
    $0.00
    $224.98
    $224.98 - $224.98
    $224.98

    $0.00 - $0.00
    $0.00
    $224.98
    $224.98 - $224.98
    $224.98
    Out of Stock
  • FALSE
    Out of Stock

    HM Digital Hydromaster Portable

    $0.00 - $0.00
    $0.00
    $224.99
    $224.99 - $224.99
    $224.99

    $0.00 - $0.00
    $0.00
    $224.99
    $224.99 - $224.99
    $224.99
    Out of Stock
  • FALSE
    Out of Stock

    24-7 pH Replacement Probe

    $0.00 - $0.00
    $0.00
    $34.99
    $34.99 - $34.99
    $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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    $0.00 - $0.00
    $0.00
    $34.99
    $34.99 - $34.99
    $34.99
    Out of Stock
  • Out of Stock

    HM Digital HydroMaster HM-500

    $0.00 - $0.00
    $0.00
    $248.99
    $248.99 - $248.99
    $248.99

    $0.00 - $0.00
    $0.00
    $248.99
    $248.99 - $248.99
    $248.99
    Out of Stock
  • Out of Stock

    Milwaukee MC720 pH Controller w- Dosing Pump Kit

    $0.00 - $0.00
    $0.00
    $259.99
    $259.99 - $259.99
    $259.99

    $0.00 - $0.00
    $0.00
    $259.99
    $259.99 - $259.99
    $259.99
    Out of Stock
  • Out of Stock

    Bluelab Soil pH Replacement Probe

    $82.05 - $82.05
    $82.05
    $82.05 - $82.05
    $82.05

    $82.05 - $82.05
    $82.05
    $82.05 - $82.05
    $82.05
    Out of Stock
  • Out of Stock

    Oakton Replacement Electrode pH 10-20-30

    $78.64 - $78.64
    $78.64
    $78.64 - $78.64
    $78.64

    $78.64 - $78.64
    $78.64
    $78.64 - $78.64
    $78.64
    Out of Stock
  • Out of Stock

    Oakton Waterproof pHTestr 30

    $126.25 - $126.25
    $126.25
    $126.25 - $126.25
    $126.25

    $126.25 - $126.25
    $126.25
    $126.25 - $126.25
    $126.25
    Out of Stock
  • FALSE
    Out of Stock

    Sure Test Commercial Lab Meter Replacement EC - TDS Probe

    $0.00 - $0.00
    $0.00
    $36.99
    $36.99 - $36.99
    $36.99

    $0.00 - $0.00
    $0.00
    $36.99
    $36.99 - $36.99
    $36.99
    Out of Stock
  • FALSE
    Out of Stock

    Sure Test Commercial Lab Meter Replacement pH Probe

    $0.00 - $0.00
    $0.00
    $29.99
    $29.99 - $29.99
    $29.99

    $0.00 - $0.00
    $0.00
    $29.99
    $29.99 - $29.99
    $29.99
    Out of Stock
  • Out of Stock

    Sure Test GroGuru Stem w- 1 Sensor

    $217.93 - $217.93
    $217.93
    $217.93 - $217.93
    $217.93

    $217.93 - $217.93
    $217.93
    $217.93 - $217.93
    $217.93
    Out of Stock
  • FALSE
    Out of Stock

    Sure Test Commercial Lab Meter Replacement ORP Probe

    $0.00 - $0.00
    $0.00
    $58.99
    $58.99 - $58.99
    $58.99

    $0.00 - $0.00
    $0.00
    $58.99
    $58.99 - $58.99
    $58.99
    Out of Stock
  • FALSE
    Out of Stock

    Sure Test Pro pH Pen Replacement Probe

    $0.00 - $0.00
    $0.00
    $22.99
    $22.99 - $22.99
    $22.99

    $0.00 - $0.00
    $0.00
    $22.99
    $22.99 - $22.99
    $22.99
    Out of Stock
  • FALSE
    Out of Stock

    Sure Test Commercial Replacement EC Probe

    $0.00 - $0.00
    $0.00
    $23.99
    $23.99 - $23.99
    $23.99

    $0.00 - $0.00
    $0.00
    $23.99
    $23.99 - $23.99
    $23.99
    Out of Stock
  • FALSE
    Out of Stock

    Sure Test Commercial Replacement DO Probe

    $0.00 - $0.00
    $0.00
    $42.99
    $42.99 - $42.99
    $42.99

    $0.00 - $0.00
    $0.00
    $42.99
    $42.99 - $42.99
    $42.99
    Out of Stock
  • FALSE
    Out of Stock

    Sure Test Commercial Replacement pH Probe

    $0.00 - $0.00
    $0.00
    $23.99
    $23.99 - $23.99
    $23.99

    $0.00 - $0.00
    $0.00
    $23.99
    $23.99 - $23.99
    $23.99
    Out of Stock
  • FALSE
    Out of Stock

    Nutradip Grow Boss TDS Replacement Probe

    $0.00 - $0.00
    $0.00
    $51.28
    $51.28 - $51.28
    $51.28

    $0.00 - $0.00
    $0.00
    $51.28
    $51.28 - $51.28
    $51.28
    Out of Stock
  • FALSE
    Out of Stock

    HM Digital Replacement pH Sensor

    $0.00 - $0.00
    $0.00
    $40.19
    $40.19 - $40.19
    $40.19

    $0.00 - $0.00
    $0.00
    $40.19
    $40.19 - $40.19
    $40.19
    Out of Stock
  • Out of Stock

    Oakton EcoTester CTS Pocket Conductivity, Salinity, and TDS Meter

    $0.00 - $0.00
    $0.00
    $81.99
    $81.99 - $81.99
    $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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    $0.00 - $0.00
    $0.00
    $81.99
    $81.99 - $81.99
    $81.99
    Out of Stock
  • Out of Stock

    Agrowtek Liquid Tight Gland Kit for Hydro Sensor Probes

    $0.00 - $0.00
    $0.00
    $12.16
    $12.16 - $12.16
    $12.16

    $0.00 - $0.00
    $0.00
    $12.16
    $12.16 - $12.16
    $12.16
    Out of Stock
  • Out of Stock

    Agrowtek Temperature Probe

    $0.00 - $0.00
    $0.00
    $47.84
    $47.84 - $47.84
    $47.84

    $0.00 - $0.00
    $0.00
    $47.84
    $47.84 - $47.84
    $47.84
    Out of Stock
  • Out of Stock

    Agrowtek pH Probe

    $0.00 - $0.00
    $0.00
    $96.49
    $96.49 - $96.49
    $96.49

    $0.00 - $0.00
    $0.00
    $96.49
    $96.49 - $96.49
    $96.49
    Out of Stock
  • Out of Stock

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

    $0.00 - $0.00
    $0.00
    $485.68
    $485.68 - $485.68
    $485.68

    $0.00 - $0.00
    $0.00
    $485.68
    $485.68 - $485.68
    $485.68
    Out of Stock
  • Out of Stock

    Agrowtek EC Probe

    $0.00 - $0.00
    $0.00
    $120.81
    $120.81 - $120.81
    $120.81

    $0.00 - $0.00
    $0.00
    $120.81
    $120.81 - $120.81
    $120.81
    Out of Stock
  • Out of Stock

    Dosatron Nutrient Delivery System - EC (PPM) - pH - Temp Monitor Kit

    $1,245.11
    $1,245.11 - $1,245.11
    $1,245.11
    $1,237.87
    $1,237.87 - $1,237.87
    $1,237.87

    $1,245.11
    $1,245.11 - $1,245.11
    $1,245.11
    $1,237.87
    $1,237.87 - $1,237.87
    $1,237.87
    Out of Stock
  • Out of Stock

    Oakton Multi PT Testr 35 - PH-TDS-Temp

    $150.37 - $150.37
    $150.37
    $150.37 - $150.37
    $150.37

    $150.37 - $150.37
    $150.37
    $150.37 - $150.37
    $150.37
    Out of Stock
  • Out of Stock

    Oakton Waterproof pHTestr 10

    $104.25 - $104.25
    $104.25
    $104.25 - $104.25
    $104.25

    $104.25 - $104.25
    $104.25
    $104.25 - $104.25
    $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.