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TDS Testers

Knowing the dissolved solids level of your hydroponic solution is critical when adding supplements and maintaining optimum levels of nutrients. These professional quality TDS meters will give you accurate information on your solution’s total dissolved solids. Some combine TDS and EC readings making conversions automatic. Want the fastest, most abundant growth possible? Get reading!

  • Handheld TDS Meter

    TDS Meter

    This handheld unit features a large LCD screen and a built-in digital thermometer.

    $37.00 $29.95
  • Bluelab Combo Meter

    Combo Meter

    All you need for simple and reliable crop management and it’s all within arms reach.

    $314.95 $304.95
  • HANNA EC/TDS Tester

    EC/TDS Tester

    The DiST5 (Dissolved Solids Tester) has a dual-level LCD that displays EC/ TDS and …

    $130.95 $119.95
  • Gro'Chek Combo (HI 991404) 1

    GroChek Combo

    Continuously monitors the three most crucial nutrient parameters in hydroponic …

    $246.95 $183.50
  • Gro'Chek EC Meter (HI 983302N) 1

    GroChek EC

    Easy to use, just hang above the sample to be monitored or take it with you for …

    $114.95 $104.50
  • Gro'Chek pH/TDS Meter (HI 981404N) 1

    GroChek pH/TDS

    Equipped with two large LCDs for easy-to-read measurements, even from …

    $210.95 $183.50
  • Gro'Chek TDS Meter (HI 983301N) 1

    GroChek TDS

    This water-resistant TDS meter features housing and cable connections that …

    $114.95 $104.50
  • Bluelab Guardian Monitor

    Guardian Monitor

    Allows you to optimize EC, pH and temperature as the crop progresses through …

    $398.95 $390.50
  • HANNA Portable Meter (HI9813-6N) 1

    Portable Meter

    Dials located on the front panel makes calibration quick and simple, even for …

    $283.95 $249.50
  • Bluelab PPM Pen

    PPM Pen

    The ultimate pen for measuring conductivity and temperature!

    $99.50 $92.95
  • Primo TDS Tester 1

    Primo TDS Tester

    Afast and dependable way to measure the Total Dissolved Solids in water samples.

    $40.95 $36.95
  • Bluelab Truncheon Meter

    Truncheon Meter

    It is essential to KNOW the strength of the solution before feeding your plants.

    $144.95 $138.50