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Hydroponic Hygrometer

Hydroponic System DiagramTo ensure that your plants are being fed the proper nutrients and nutrient concentrations, it is important to monitor your nutrient solution.

On a daily basis you should test the nutrient solution and record the results

  • EC (Nutrient concentrations)
  • PH (acidity / alkalinity...see Lesson 4 for more information on PH)
  • Temperature of nutrient solution
  • Daytime room temperature
  • Nighttime room temperature

It is also important to record when you replace your nutrient solution so you can easily determine when it should again be replaced.

In addition to these tests, you may also want to record the stage of plant growth, the size of your plants and any problems or significant changes.

Recording this information gives you an accurate accounting of what is happening with your plants. This data is an excellent tool for diagnosing problems, should they arise.

Advanced Nutrient Testing
Neither an EC or TDS meter can indicate precisely what nutrients make up the fertilizer solution. More complete test kits are available for this purpose. Many commercial growers test their nutrient solutions on a regular basis to ensure they are feeding exactly the mix that is intended. Regular leaf analysis is an excellent tool for determining the health of your plants. Leaf tissue samples are dried, crushed and analyzed to determine the exact nutrient content.

Most of the more complex kits will test nitrogen, potassium, phosphorous and sulfur. Commercial labs offer more precise results. In the event of a combination of nutrient deficiencies, the symptoms of one problem may mask the symptoms of another. A leaf tissue analysis may be the only way to determine what is wrong with your plants.

Listed below are some testing devices to get started with.


Fluke Calibration 1621A-S-156
Fluke Calibration 1621A-S-156 "DewK" Thermo-Hygrometer
$3955.0

Flir Mr277 Moisture Meter, Msx Ir Camera  Hygrometer For Building Inspection picture
Flir Mr277 Moisture Meter, Msx Ir Camera Hygrometer For Building Inspection
$1827.99

Barigo Board Station Weather Baró / Termó / Hygrometer Colour Chrome picture
Barigo Board Station Weather Baró / Termó / Hygrometer Colour Chrome
$785.36

Delmhorst HT-4000F/PKG Digital Thermo-Hygrometer Package, HT-4000F with 324CAS-0 picture
Delmhorst HT-4000F/PKG Digital Thermo-Hygrometer Package, HT-4000F with 324CAS-0
$670.95

Indoor Plant Growing Tent Kit, Indoor Tent Complete Kit w/ Led Light Hygrometer picture
Indoor Plant Growing Tent Kit, Indoor Tent Complete Kit w/ Led Light Hygrometer
$631.99

Meteorological station. Barometer. Hygrometer. Luxury gift Interior design picture
Meteorological station. Barometer. Hygrometer. Luxury gift Interior design
$600.0

Digital LCD Hygrometer Humidity Indoor Outdoor Thermometer Temperature Monitor picture
Digital LCD Hygrometer Humidity Indoor Outdoor Thermometer Temperature Monitor
$500.0

Delmhorst QuickNav 3‑in‑1 Digital Moisture Meter Thermo‑Hygrometer Complete Pack picture
Delmhorst QuickNav 3‑in‑1 Digital Moisture Meter Thermo‑Hygrometer Complete Pack
$499.99

Panametrics MTS4-331-10, Panametrics MTS 4 Hygrometer Gauge picture
Panametrics MTS4-331-10, Panametrics MTS 4 Hygrometer Gauge
$491.23

Delmhorst HT-3000 Thermo-hygrometer picture
Delmhorst HT-3000 Thermo-hygrometer
$445.0

Bosch GIS 1000C Thermo Detector Infrared Scanner Imaging Thermometer/hygrometer picture
Bosch GIS 1000C Thermo Detector Infrared Scanner Imaging Thermometer/hygrometer
$381.99

Protimeter Hygromaster L with HygroStick - BLD7750L picture
Protimeter Hygromaster L with HygroStick - BLD7750L
$375.0

Delite Schatz Mini Ocean Thermometer Hygrometer Chrome 4 7/32in x 1 31/32in picture
Delite Schatz Mini Ocean Thermometer Hygrometer Chrome 4 7/32in x 1 31/32in
$361.78

Station Weather View Chrome Machinery Barometer Thermometer Hygrometer picture
Station Weather View Chrome Machinery Barometer Thermometer Hygrometer
$359.74

Delmhorst Electrodes QuickNav 3 in 1 Digital Moisture Meter Thermo‑Hygrometer picture
Delmhorst Electrodes QuickNav 3 in 1 Digital Moisture Meter Thermo‑Hygrometer
$349.99

Delite Schatz Mini Ocean Thermometer Hygrometer Brass 4 7/32in x 1 31/32in 401ht picture
Delite Schatz Mini Ocean Thermometer Hygrometer Brass 4 7/32in x 1 31/32in 401ht
$336.74

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