• Sale!

    Active Aqua pH Test Kit

    $5.95 $4.46
    Add to cart
  • Sale!

    Batteries for pH/TDS pen, pack of 4

    $6.95 $5.21
    Add to cart
  • Sale!

    Bluelab Commercial Truncheon Meter

    $140.00 $105.00
    Add to cart
  • Sale!

    Bluelab Guardian Monitor Power Supply

    $22.60 $16.95
    Add to cart
  • Sale!

    Bluelab Truncheon Meter

    $140.00 $105.00
    Add to cart
  • Sale!

    Calibration Solution 1500PPM

    $1.40 $1.05
    Add to cart
  • Sale!

    Champ pH Tester

    $62.99 $47.24
    Add to cart
  • Sale!

    Combo pH/ ORP/ Temperature Tester

    $232.99 $174.74
    Add to cart
  • Sale!

    Combo pH/EC/TDS/C/PPM Tester

    $199.99 $149.99
    Add to cart
  • Sale!

    Conductivity/TDS Probe for Soil Measurement of HI993310

    $156.95 $117.71
    Add to cart
  • Sale!

    Cont. pH/TDS/temp Monitor

    $252.95 $189.71
    Add to cart
  • Sale!

    Continuous Monitor/Portable PH meter

    $151.99 $113.99
    Add to cart
  • Sale!

    Continuous pH/TDS/temp Monitor

    $278.99 $209.24
    Add to cart
  • Sale!

    Digital Soil Thermometer

    $14.99 $11.24
    Add to cart
  • Sale!

    DiST 1 TDS Tester

    $68.99 $51.74
    Add to cart
  • Sale!

    DiST 5 EC/TDS Meter

    $131.99 $98.99
    Add to cart
  • Sale!

    EC65 Waterproof Tester

    $88.99 $66.74
    Add to cart
  • Sale!

    EC66 Waterproof Tester

    $80.95 $60.71
    Add to cart
  • Sale!

    Gro’chek replacement probe for HI9813-6

    $146.99 $110.24
    Add to cart
  • Sale!

    GroChek EC Electrode

    $57.95 $43.46
    Add to cart
  • Sale!

    GroChek EC Monitor

    $114.95 $86.21
    Add to cart
  • Sale!

    GroChek EC Tester

    $115.95 $86.96
    Add to cart
  • Sale!

    GroChek Hanna EC/TDS Monitor w/ HI7632 EC Probe

    $114.95 $86.21
    Add to cart
  • Sale!

    GroChek Hanna pH Indicator

    $138.99 $104.24
    Add to cart
  • Sale!

    GroChek Hanna pH/EC/TDS/C/PPT Pocket Tester

    $199.99 $149.99
    Add to cart
  • Sale!

    GroChek pH & TDS Combo Continuous Reading Meter

    $224.99 $168.74
    Add to cart
  • Sale!

    GroChek pH/EC/TDS/C Portable Meter w/ Cal Check

    $264.99 $198.74
    Add to cart
  • Sale!

    GroChek pH/EC/TDS/Temp. Combo

    $259.99 $194.99
    Add to cart
  • Sale!

    GroChek replacement probe for HI9813

    $131.99 $98.99
    Add to cart
  • Sale!

    Grochek Replacement Probe for HI9813-5 & HI9813-5N

    $146.99 $110.24
    Add to cart