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DESCRIPTION
5. DESCRIPTION
5.1. GENERAL DESCRIPTION & INTENDED USE
The
HI981413
Nutrient Dosing System is part of Hanna Instruments Groline family and features a
durable EC controller with peristaltic dosing pump and a robust EC process sensor. The
HI981413
has been designed to easily assimilate into a nutrient/fertilizer system to provide around the clock
monitoring and adjustment of hydroponic nutrient solutions to ensure operational consistency.
Nutrient management requires monitoring and optimizing nutrient levels efficiently before applying to
plants. In a freshly made solution, EC is the best way to verify that the resultant fertilizer agrees with
the fertilizer manufacturer’s recommendations.
Nutrients required for thriving plant growth are supplied through liquid nutrient solutions that contain
dissolved salts which are conductive. Conductivity measurements detect the amount of salts that have
been dissolved in the water. A higher EC indicates more salts have been dissolved and a lower EC
indicates a lower total salt concentration.
The
HI981413
Nutrient Dosing System precisely monitors and displays the conductivity measured by
the
HI30033
waterproof EC/Temperature probe and simultaneously controls the addition of nutrient
fertilizer using On/Off or proportional control. Growers can define the ideal set point in conductivity
(mS/cm) or TDS (ppm) units. The
HI981413
is a small dosing controller and can be easily setup for
a stand-alone nutrient reservoir or be part of a modular control scheme with the
HI981412
Groline
pH Dosing controller.
To obtain a representative conductivity measurement, the probe should be located at a spot that
experiences good circulation but is free from bubbles. The probe can be used in a “sample pot” or
reservoir or installed in a flow cell or recirculation line; perfect for drain-to waste or recirculating systems.