HI981412 Groline pH Dosing System (for Nutrient Solutions and Irrigation Water)

R 8,776.00 *

Prices excluded VAT and delivery costs

Delivery time approx. 2 to 4 weeks

Dosing System Options:

  • HI981412-00
HI981412 pH Dosing System is engineered for maintaining the pH of nutrient solutions and... more
Product information "HI981412 Groline pH Dosing System (for Nutrient Solutions and Irrigation Water)"

HI981412 pH Dosing System is engineered for maintaining the pH of nutrient solutions and irrigation water. The pH of nutrient solution or irrigation water is critical for the successful propagation and growth of plants. Macro and micro nutrients as well as calcium and magnesium bloom boosters require the correct pH for absorption into the plants root system. The HI981412 was developed to be an inexpensive solution for the horticulturist to maintain the ideal pH at all times. Simply insert the probe and injection valve in-line with the recirculation pump and provide the chemical to be dosed.

HI981412 is available in multiple configurations including a meter and probe option, a kit for in-line mounting, and a complete package that includes bypass loop and panel mounted flow cell. The kit for in-line and flow cell models include aspiration tubing with filter and dispensing tubing with injection valve.

HI10063-Amplified-pH_Temp-Probe

Peristaltic Dosing Pump
The HI981412 has a powerful built-in peristaltic chemical feed pump that utilizes a stepper motor which does not have any gears or brushes to wear out. This design provides for a long life and little maintenance.

HI981412_casing-input_full

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 chemical 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 a desired set point.For example, a controller is programmed to have a set point of pH 6.80 with a 1.00 pH unit proportional band and the flow rate at 1.0 L/h. Any reading above pH 7.80 will cause the dosing of acid to be at 1.0 L/h. If the reading is at pH 7.30, which is 1/2 of the band, then the dosing pump will run at half speed or deliver 0.5 L/h of chemical. The closer the reading is to the set point the longer it takes for the pump to complete one rotation. This allows for very fine control of the pH value desired.

Programmable Alarm System
Enables or disables the low and high-level alarms for pH. When an alarm is activated, all dosing will stop. For added safety, the alarm system also offers overdosing protection in that if the set point value is not corrected within a programmed time interval then the meter will go into alarm status.

 

HI981412-Quick-Connect-ProbepbXr5Gn9QugYJ

Quick Connect Probe Input

The Quick Connect DIN connector creates a waterproof seal with the controller making it ideal for reducing electrical noise issues with the connection caused by humid environments.

 Automatic Proportional Pump Control

The peristaltic dosing pump can be controlled by simple on/off or more advanced proportional control which helps prevent 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.

The HI981412 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. 

 HI981412-Acid-Tank-Level-Switch

 

Multicolored LCD Display

The HI981412 features a multi-colored LCD that provides for a quick way to see the status of the controller. If in control mode and operating as intended the display will be green. If control is not enabled then the display will be yellow; while in an alarm state the display flashes red.

HI981412-MultiColoured-LCD-Display

 

 

HI10063 Amplified pH/Temperature Probe
The HI981412 uses the HI10063 amplified probe that incorporates both pH and temperature sensors and connects to the controller with a single waterproof Quick Connect DIN connector. The built in amplifier helps to reduce electrical noise from recirculation pumps to provide for a stable, reliable measurement. The pH glass used is ideal for low conductivity water and provides for fast response. The PVDF 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.

HI10063-Ampliefied-pH_Temperature-Probe

 

 

 SPECIFICATIONS HI981412
PH RANGE 0.00 to 14.00 pH
RESOLUTION 0.01 pH
Accuracy (@25°C/77°F) ±0.10 pH
CALIBRATION

user calibration: automatic, one or two-point with buffer solution (4.01, 7.01, 10.01 pH)
Process calibration: single point, adjustable (±0.50 pH around measured pH)

TEMPERATURE RANGE -5.0 to 105.0°C (23.0 to 221.0°F)
RESOLUTION 0.1°C (0.1°F)
Accuracy (@25°C/77°F) ±0.5°C (±0.9°F)
ADDITIONAL SPECIFICATIONS               TEMPERATURE COMPENSATION Automatic
DOSING CONTROL TYPE

On/Off control using adjustable set point (4.00 to 10.00 pH) with adjustable hysteresis
(0.10 to 1.00 pH)
proportional control using adjustable set point (4.00 to 10.00 pH) with adjustable proportional band (0.10 to 2.00 pH)

DOSING CONTROL ACTIVATION

high or low mode operation
high set point dosing is activated when reading is higher than set point (dose acid)
Low set point dosing is activated when reading is lower than set point (dose base)

DELAY START FOR DOSING startup delay timer at power-on (0 to 600 sec.)
MAXIMUM DOSING TIME overfeed protection using overtime safety timer (1 to 180 min. or Off)
PUMP FLOW CONTROL

selectable flow rate (0.5 to 3.5 L / hour; 0.13 to 0.92 G/hour)
manual control for pump priming

ALARMS

triggered after 5 sec. if controller records a set of consecutive readings over / under threshold values
level with enable / disable option
overtime protection (1 to 180 min. or off)
Intuitive alarm system, using red-yellow-green color-coded backlight

ALARM OUTPUT RELAY (1)   SPDT 2.5A / 230 VAC
EXTERNAL EVENT INPUT   input for level controller or flow switch to disable dosing pump in the event of no chemical when using a level controller or no flow when using a flow switch - galvanically isolated
PROBE INPUT (1)   HI10063 amplified pH/Temperature probe with quick connect DIN connector - galvanically isolated
POWER SUPPLY   100—240 VAC, 50/60 Hz
 POWER CONSUMPTION  15 VA
ENVIRONMENT   0-50°C (32-122°F), max. 95% RH non-condensing
 DIMENSIONS  90 x 142 x 80 mm (3.5 x 5.6 x 1.8”)
 WEIGHT  910 g (32 oz)
 CASING  wall mounted, built-in pump, IP65 rated
 ORDERING INFORMATION  HI981412-00 is supplied with HI981412 controller, HI10063 pH/temperature probe, 4.01 pH buffer solution, 20 mL (3), 7.01 pH buffer solution, 20 mL (3), power connection cable, instruction manual and quality certificates for instrument and probe.

HI981412-10 (with in-line mounting kit) is supplied with HI981412 controller, HI10063 pH/temperature probe, controller aspiration filter, controller injector, 1/2” thread, saddle for Ø 50 mm pipe (2), PVC aspiration tubing (flexible) (5 m), PE rigid dispensing tubing (5 m), 4.01 pH buffer solution, 20 mL (3), 7.01 pH buffer solution, 20 mL (3), power connection cable, instruction manual and quality certificates for instrument and probe.

HI981412-20 (with flow-cell mounting kit) is supplied with HI981412 controller, HI10063 pH/temperature probe, flow cell for HI981412, mounting panel assembly for HI981412, controller aspiration filter, controller injector, 1/2” thread, saddle for Ø 50 mm pipe (3), PVC aspiration tubing (flexible) (5 m), PE rigid dispensing tubing (15 m), barbed tubing adapter 1/2” - 6 mm with racord (2), valves (2), 4.01 pH buffer solution, 20 mL (3), 7.01 pH buffer solution, 20 mL (3), power connection cable, instruction manual and quality certificates for instrument and probe. 

Related links to "HI981412 Groline pH Dosing System (for Nutrient Solutions and Irrigation Water)"
Available downloads:
Read, write and discuss reviews... more
Customer evaluation for "HI981412 Groline pH Dosing System (for Nutrient Solutions and Irrigation Water)"
Write an evaluation
Please enter these characters in the following text field.

The fields marked with * are required.

Hint!
Viewed