Showing all 12 results

TDS Testers
Knowing the dissolved solids level of your hydroponic solution is critical when adding supplements and maintaining optimum levels of nutrients. A professional quality TDS meter will give you accurate information on your solution’s total dissolved solids or electrical conductivity (EC). Want the fastest, most abundant growth possible? Get reading!
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Combo Meter
All you need for simple and reliable crop management and it’s all within arms reach.
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HM Digital (TDS-3)
This handheld pen includes a large screen and a built-in thermometer at a great price.
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Primo Tester
A fast and dependable way to measure the total dissolved solids in water samples.
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PPM Pen
Use to maximize plant health, prevent burn and ensure optimum plant yields.
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Combo (HI991404)
Continuously monitors the three most crucial nutrient ranges in hydroponics.
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Continuous Indicator (HI981404N)
Ideal for hydroponics applications where constant measurements are required.
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DiST5 (HI98311)
Delivers accurate results with automatic calibration and temperature compensation.
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Gro’Chek EC (HI983302N)
Easy to use, just hang above the sample to be monitored or take it along with you!
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Gro’Chek TDS (HI983301N)
Ships complete with a low-maintenance probe and complete instructions.
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Guardian Monitor
Easy to use, just plug it in and place the probes in your nutrient reservoir.
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Portable (HI9813-6N)
Large dials located on the front panel makes calibration quick and simple.
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Truncheon
It is essential to KNOW the strength of the solution before feeding your plants.