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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 1524-156 Thermocouple Thermometer,2 Input picture
FLUKE 1524-156 Thermocouple Thermometer,2 Input
$2385.0

HART 1523-P1-156 Thermocouple Thermometer,1 Input picture
HART 1523-P1-156 Thermocouple Thermometer,1 Input
$2373.06

NOTIFEYE 15906 Gateway Kit,1-11/64
NOTIFEYE 15906 Gateway Kit,1-11/64" H,900 MHz RF
$1560.38

NOTIFEYE 15907 Gateway Kit,1-11/64
NOTIFEYE 15907 Gateway Kit,1-11/64" H,900 MHz RF
$1491.12

EXTECH TM500 Thermocouple Datalogger,12 Channels picture
EXTECH TM500 Thermocouple Datalogger,12 Channels
$1099.0

Stadler Form Selina Hygrometer Lime  picture
Stadler Form Selina Hygrometer Lime
$999.99

HOWARD MILLER THERMOMETER, BROMETER, HYGROMETER 612-721 OLYMPIA picture
HOWARD MILLER THERMOMETER, BROMETER, HYGROMETER 612-721 OLYMPIA
$799.0

FLUKE 1551A-12 RTD Thermometer,-58 to 320F,Digital picture
FLUKE 1551A-12 RTD Thermometer,-58 to 320F,Digital
$756.0

FLUKE 1551A-9 RTD Thermometer,-58 to 320F,Digital picture
FLUKE 1551A-9 RTD Thermometer,-58 to 320F,Digital
$733.5

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
$670.01

GEORG JENSEN HYGROMETER Weather Station Henning Koppell RRP $1,200 picture
GEORG JENSEN HYGROMETER Weather Station Henning Koppell RRP $1,200
$627.73

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

Cigar Cooler Humidor Stainless Steel Freestanding Humidity Tray Hygrometer LCD picture
Cigar Cooler Humidor Stainless Steel Freestanding Humidity Tray Hygrometer LCD
$587.12

TRACEABLE 4000 NIST Traceable® Digital Thermistor Thermometer, -58 Degrees  to picture
TRACEABLE 4000 NIST Traceable® Digital Thermistor Thermometer, -58 Degrees to
$515.51

EXTECH 42570 IR Therm,1
EXTECH 42570 IR Therm,1" @ 50",-58 to 3992 Deg. F
$507.36

Delmhorst Navigator Pro / NAVPRO/BP complete package picture
Delmhorst Navigator Pro / NAVPRO/BP complete package
$500.0

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