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Meters & Testers

(100)
  1. Fall Harvest Sale - Bluelab OnePen - With replaceable pH, Conductivity (EC) & Temperature Probe
    BlueLab
    Fall Harvest Sale - Bluelab OnePen - With replaceable pH, Conductivity (EC) & Temperature Probe
    Special Price $197.28 Regular Price $286.35
    Out of stock
    • Free shipping
    • - 31 %
  2. Bluelab pH Probe KCL Storage Solution 120mL
    BlueLab
    Bluelab pH Probe KCL Storage Solution 120mL
    Special Price $15.29 Regular Price $18.40
    • Free shipping
    • - 17 %
  3. Hanna GroLine General Purpose Cleaning Solution Sachets 20 mL - EACH
    Hanna Instruments
    Hanna GroLine General Purpose Cleaning Solution Sachets 20 mL - EACH
    Special Price $2.40 Regular Price $2.66
    In stock
    • Free shipping
    • - 10 %
  4. GroStar EC Calibration Kit (2.77 EC, 8 oz. each)
    GroStar
    GroStar EC Calibration Kit (2.77 EC, 8 oz. each)
    Special Price $16.89 Regular Price $18.68
    • Free shipping
    • - 10 %
  5. GroStar pH Probe Maintanence Kit
    GroStar
    GroStar pH Probe Maintanence Kit
    Special Price $27.04 Regular Price $29.90
    • Free shipping
    • - 10 %
  6. GroStar pH calibration kit (pH 4/7/10, 8 oz. each)
    GroStar
    GroStar pH calibration kit (pH 4/7/10, 8 oz. each)
    Special Price $32.65 Regular Price $36.10
    • Free shipping
    • - 10 %
  7. GroStar pH calibration kit (pH 4/7, 8 oz. each)
    GroStar
    GroStar pH calibration kit (pH 4/7, 8 oz. each)
    Special Price $21.40 Regular Price $23.67
    • Free shipping
    • - 10 %
  8. GroStar GS4-E replacement pH/EC combo electrode
    GroStar
    GroStar GS4-E replacement pH/EC combo electrode
    Special Price $86.73 Regular Price $95.90
    • Free shipping
    • - 10 %
  9. GroStar GS3-E replacement EC electrode
    GroStar
    GroStar GS3-E replacement EC electrode
    Special Price $60.81 Regular Price $67.24
    • Free shipping
    • - 10 %
  10. GroStar GS2-E replacement Soil Spear pH electrode
    GroStar
    GroStar GS2-E replacement Soil Spear pH electrode
    Special Price $161.61 Regular Price $209.29
    • Free shipping
    • - 23 %
  11. GroStar GS1-E replacement pH electrode
    GroStar
    GroStar GS1-E replacement pH electrode
    Special Price $57.42 Regular Price $63.49
    • Free shipping
    • - 10 %
  12. GroStar GS2 Soil pH Pen
    GroStar
    GroStar GS2 Soil pH Pen
    Special Price $250.78 Regular Price $295.54
    • Free shipping
    • - 15 %
  13. GroStar GS4 pH/EC Combo Pen
    GroStar
    GroStar GS4 pH/EC Combo Pen
    Special Price $182.01 Regular Price $205.84
    • Free shipping
    • - 12 %
  14. GroStar GS3 EC Pen
    GroStar
    GroStar GS3 EC Pen
    Special Price $106.65 Regular Price $131.09
    • Free shipping
    • - 19 %
  15. Fall Harvest Sale - Phantom PHOTOBIO Advanced Quantum PAR Meter
    PHOTOBIO
    Fall Harvest Sale - Phantom PHOTOBIO Advanced Quantum PAR Meter
    Special Price $145.28 Regular Price $252.99
    Out of stock
    • Free shipping
    • - 43 %
  16. Bluelab Connect Range Extender 2
    BlueLab
    Bluelab Connect Range Extender 2
    Special Price $230.04 Regular Price $254.37
    • Free shipping
    • - 10 %
  17. Bluelab Connect Stick 2
    BlueLab
    Bluelab Connect Stick 2
    Special Price $169.50 Regular Price $187.43
    • Free shipping
    • - 10 %
  18. Bluelab pH Controller Power Supply
    BlueLab
    Bluelab pH Controller Power Supply
    Special Price $53.51 Regular Price $59.17
    • Free shipping
    • - 10 %
  19. Bluelab COMMERCIAL Truncheon Meter
    BlueLab
    Bluelab COMMERCIAL Truncheon Meter
    Special Price $122.60 Regular Price $171.35
    • Free shipping
    • - 28 %
  20. WHITE METER - Hanna Instruments GroLine Direct Soil pH Tester
    Hanna Instruments
    WHITE METER - Hanna Instruments GroLine Direct Soil pH Tester
    Special Price $152.44 Regular Price $168.57
    Out of stock
    • Free shipping
    • - 10 %
  21. Fall Harvest Sale - Bluelab Pulse Multimedia EC/MC Meter
    2 left at this sweet price!
    2/2
    BlueLab
    Fall Harvest Sale - Bluelab Pulse Multimedia EC/MC Meter
    Special Price $259.00 Regular Price $412.85
    Special Price $269.36 Regular Price $412.85
    In stock
    • Free shipping
    • - 37 %
  22. PLUS - Bluelab Combo PLUS Meter - Probe Included
    BlueLab
    PLUS - Bluelab Combo PLUS Meter - Probe Included
    Special Price $356.09 Regular Price $435.85
    • Free shipping
    • - 18 %
  23. HM Digital Brix Refractometer Model SCM-1000 (CLOSEOUT)
    HM Digital
    HM Digital Brix Refractometer Model SCM-1000 (CLOSEOUT)
    Special Price $102.96 Regular Price $385.25
    Out of stock
    • New
    • Free shipping
    • - 73 %
  24. Hanna GroLine General Purpose Cleaning Solution (500 mL)
    Hanna Instruments
    Hanna GroLine General Purpose Cleaning Solution (500 mL)
    Special Price $21.30 Regular Price $23.55
    Out of stock
    • Free shipping
    • - 10 %
  25. Hanna GroLine General Purpose Cleaning Solution Sachets 20 mL (25 pcs.)
    Hanna Instruments
    Hanna GroLine General Purpose Cleaning Solution Sachets 20 mL (25 pcs.)
    Special Price $46.96 Regular Price $51.92
    Out of stock
    • Free shipping
    • - 10 %
  26. Hanna GroLine pH 7.01 Calibration Buffer (500 mL)
    Hanna Instruments
    Hanna GroLine pH 7.01 Calibration Buffer (500 mL)
    Special Price $21.30 Regular Price $23.55
    In stock
    • Free shipping
    • - 10 %
  27. Hanna GroLine pH 7.01 Buffer Sachets 20 mL (25 pcs.)
    Hanna Instruments
    Hanna GroLine pH 7.01 Buffer Sachets 20 mL (25 pcs.)
    Special Price $46.96 Regular Price $51.92
    In stock
    • Free shipping
    • - 10 %
  28. Hanna GroLine pH 4.01 Calibration Buffer (500 mL)
    Hanna Instruments
    Hanna GroLine pH 4.01 Calibration Buffer (500 mL)
    Special Price $21.30 Regular Price $23.55
    Out of stock
    • Free shipping
    • - 10 %
  29. Hanna GroLine pH 4.01 Buffer Sachets 20 mL (25 pcs.)
    Hanna Instruments
    Hanna GroLine pH 4.01 Buffer Sachets 20 mL (25 pcs.)
    Special Price $46.96 Regular Price $51.92
    Out of stock
    • Free shipping
    • - 10 %
  30. Hanna Quick Calibration Solution for GroLine pH and EC Meters (500 ml)
    Hanna Instruments
    Hanna Quick Calibration Solution for GroLine pH and EC Meters (500 ml)
    Special Price $23.07 Regular Price $25.51
    In stock
    • Free shipping
    • - 10 %
  31. Hanna GroLine pH/EC/TDS Multiparameter Probe for HI981420
    Hanna Instruments
    Hanna GroLine pH/EC/TDS Multiparameter Probe for HI981420
    Special Price $205.74 Regular Price $227.50
    In stock
    • Free shipping
    • - 10 %
  32. Hanna Instruments GroLine Monitor for Hydroponic Nutrients - pH/EC/TDS - HI981420
    Hanna Instruments
    Hanna Instruments GroLine Monitor for Hydroponic Nutrients - pH/EC/TDS - HI981420
    Special Price $414.91 Regular Price $458.79
    Out of stock
    • Free shipping
    • - 10 %
  33. Bluelab Leap pH Probe (Probe Only)
    BlueLab
    Bluelab Leap pH Probe (Probe Only)
    Special Price $116.20 Regular Price $148.35
    Out of stock
    • Free shipping
    • - 22 %
  34. Bluelab pH Probe KCl Storage Solution 250ml KCL
    BlueLab
    Bluelab pH Probe KCl Storage Solution 250ml KCL
    Special Price $24.58 Regular Price $27.60
    • Free shipping
    • - 11 %
  35. Emerald Harvest pH Down - 270 GALLONS
    Emerald Harvest
    Emerald Harvest pH Down - 270 GALLONS
    Special Price $7,834.53 Regular Price $10,654.65
    • New
    • - 26 %
  36. Fall Harvest Sale - Emerald Harvest pH Down - 6 GALLONS
    Emerald Harvest
    Fall Harvest Sale - Emerald Harvest pH Down - 6 GALLONS
    Special Price $104.00 Regular Price $375.71
    In stock
    • New
    • - 72 %

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