HI GroLine Nutrient Dosing System

SKU: HI981413-00

410.00 410.0 USD 410.00


The HI981413 GroLine Nutrient Dosing System is a complete solution with an advanced process controller and a built-in chemical dosing pump. Simply insert the probe and injection valve in line with the re-circulation pump and supply the stock fertilizer to be dosed.

  • GroLine Model

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HI GroLine Nutrient Dosing System

Engineered to be an inexpensive solution for the hydroponic or greenhouse grower to maintain the ideal nutrient solution concentration level in the reservoir tank. The HI981413 GroLine Nutrient Dosing System is a complete solution with an advanced process controller and a built-in chemical dosing pump. Simply insert the probe and injection valve in line with the re-circulation pump and supply the stock fertilizer to be dosed.

  • All in one solution for maintaining the proper nutrient levels
  • Industrial process probe with 1/2" NPT threads for insertion into a re-circulation line
  • Available in three configurations including a complete kit with panel-mounted flow cell

HI981413 Nutrient Dosing System is designed to maintain the concentration of fertilizer nutrient solution used in hydroponics and irrigation water. The HI981413 uses an amperometric conductivity sensor to measure the amount of fertilizer in the solution. The meter can be programmed to display results as EC (electrical conductivity) or as TDS (total dissolved solids). The EC results are displayed as mS/cm while TDS is displayed as ppm with a selectable conversion factor from 0.45 to 0.99. The HI981413 was developed as a cost-effective solution for the horticulturist to maintain the ideal fertilizer concentrations by placing the probe and injection valve in line with the re-circulation pump to provide the chemical to be dosed.

Multi-color LCD

The HI981413 features a multi-colored LCD to show the status of the pool controller. The display is green during normal operation, yellow if the control is not enabled, or flashes red when an alarm is triggered.

Intuitive LCD

Both conductivity or TDS and temperature are displayed with status icons that show when the pump is dosing and the control mode status.

Programmable Alarm System

Hanna controllers allow users to enable or disable the low and high-level alarms for EC/TDS. When an alarm is activated, all dosing will stop. For added safety, the alarm system also offers overdose protection in that if the set point value is not corrected within a programmed time interval then the meter will go into alarm status.

On-Screen Features

Adjustable Flow Rate
The flow rate from the dosing pumps is adjustable from 0.5 to 3.5L/h. Larger bodies of water require more chemicals to be dosed than smaller ones in per unit of time. The adjustable flow rate, like the proportional band, allows for better control in maintaining the desired set point.

Automatic Proportional Pump Control
The peristaltic dosing pump can be controlled by simple on/off or more advanced proportional control which helps prevents overshooting of the set point. When using proportional control the flow rate that is programmed, will be impacted by the proportional band used. The closer the reading is to the set point the longer it takes for the peristaltic pump to complete one revolution. If the reading is outside the proportional band then the amount of time it takes to complete one revolution is based on the flow rate programmed.

Acid Tank Level/Flow Switch Input
The BL100 allows for a connection to an optional level controller or flow switch. This input can be used to disable the dosing pump when there is no chemical left in the reservoir tank or there is no flow due to the pump being turned off.

Built-in Dosing Pump
Peristaltic Dosing Pump

The HI981413 features a peristaltic dosing pump that is superior to diaphragm versions due to the ability to self-prime when there is no liquid in the uptake line.

Brushless Motor

The brushless motor does not have any gears or brushes that can wear out. A brushless design provides for long life and little maintenance. The compact stepper motor allows for very precise control over the dosing of the chemical.

Long-life Peristaltic Tubing

The industrial grade peristaltic tubing is chemical resistant and provides for relatively long life. As tubing stretches over time it can be easily replaced. No special tools are required.

Conductivity electrode with flow cell
Three Configuration Options

The HI981413 is available in multiple configurations including a meter only, meter and probe, and
 a complete package that includes a bypass loop
 and panel-mounted flow through the cell. All models include aspiration tubing with filter and dispensing tubing with injection valve.

HI30003 Amperometric Conductivity/Temperature Probe

The HI981413 uses the HI30003 probe that incorporates both conductivity and temperature sensors and connects to the controller with a single waterproof Quick Connect DIN connector.

NPT Threads for In-line and Tank Mounting

The ABS body of the probe has a 1/2” threaded fitting for insertion to an in-line “T” fitting or the flow cell. The back end part of the probe has 3/4” NPT threads for submersion/ tank mounting. The probe body has a hex fitting for tightening snuggly with a wrench.....

Weight (lbs)2.25
Length (in)3.5
Width (in)5.6
Height (in)1.8
EC Resolution0.01 mS/cm
EC Accuracy2% F.S.
EC CalibrationUser calibration
TDS Range0 to 9900 ppm, depending on the TDS factor
i.e. with a TDS factor of 0.5, a range of 50 to 5000 ppm
with TDS factor 0.7, range 70 to 7000 ppm
TDS Resolution1 ppm
TDS Accuracy2% F.S.
EC/TDS Temperature Compensationautomatic
Temperature Correction Coefficientβ can be set from 0%/°C to 2.4%/°C; the default is 1.9%/°C
EC to TDS Conversion FactorTDS factor selectable from 0.45 to 0.99
EC/TDS Dosing Set Pointon/off control using adjustable set point (0.10 to 10.00 mS/cm; 45 to 9900 ppm, depending on the TDS factor)
proportional control 0.10 to 10.00 mS/cm; 45 to 9900 ppm, depends on TDS factor
EC/TDS Proportional Band0.05 to 1.00 mS/cm; 23 to 990 ppm, depending on the TDS factor
EC/TDS Hysteresis Band0.05 to 0.50 mS/cm; 23 to 495 ppm, depends on TDS factor
Temperature Range-5.0 to 105.0°C; 23.0 to 221.0°F*
Temperature Resolution0.1°C; 0.1°F
Temperature Accuracy±0.5°C; 1°F
Dosing Controlstartup delay timer at power-on (0 to 600 sec.)
Pump flow control 0.5 to 3.5 Liter/hour (0.13 to 0.92 Gallon/hour) and maximum output pressure 1 atm (14 psi)
manual control for pump priming (defined in setup)
Alarm Relay Set Pointtriggered after 5 sec. if the controller records consecutive readings over or under threshold values
Over Dosing Controlovertime protection (1 to 180 min. or Off)
Digital Input Signalgalvanically isolated external switches can be attached to stop the pump and activate the alarm (low reagent level) when the switch is open and the level alarm is configured in Setup
Backlightintuitive alarm system, using red, yellow, and green color-coded backlight
Power Consumption15 VA
Enclosurewall-mounted, built-in pump
Power Supply100 - 240 Vac, 50/60 Hz
Environment0 to 50°C (32 to 122°F); RH max. 95% non-condensing
IP RatingIP65
Dimensions90 x 142 x 80 mm (3.5 x 5.6 x 1.8”)
Weight908 g (36 oz.)
Ordering InformationHI981413-00 is supplied with HI981413 controller, HI30033 EC/TDS/temperature probe, HI7031-012 conductivity calibration solution (1413 μS/cm - 120 ml), plastic beaker, power connection cable, instruction manual and quality certificates for instrument and probe.
Notes*The temperature range may be limited by the probe’s limits.