GroLine pH Dosing System

$469.95

Maintaining the correct pH of plant soil or hydroponic nutrient solution is an ongoing task. 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 Groline pH Dosing System easily assimilates into a nutrient/fertiliser system for soil and hydroponics. Simply insert the probe and injection valve in-line with the recirculation pump and provide the chemical to be dosed.

Available in multiple configurations for easy integration into your setup.
Programmable alarm system and multicolored LCD display.
Perfect for small hydroponics systems.

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Peristaltic Dosing Pump

The powerful built-in peristaltic pump uses a stepper motor which does not have any gears or brushes providing for a long life with little maintenance.

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.

Adjustable Flow Rate

The dosing pump flow rate is adjustable from 0.5 to 3.5L/h, allowing for better control in maintaining a desired set point.

Acid Tank Level/Flow Switch Input

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.

Multicolored LCD Display

A multi-colored LCD provides a quick way to see the status of the pool controller. The display will show green when operation normally and red while in an alarm state.

Quick Connect Probe Input

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

GroLine 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.

Built-in amplifier
PVDF body
1/2” threaded fitting for insertion to an in-line “T” fitting or the flow cell

Resources

Specification

Specification Name	Detail
SKU	HI981412
pH Range	0.00 to 14.00 pH
pH Resolution	0.01 pH
pH Accuracy (@25°C/77°F)	±0.10 pH
Temperature Range	-5.0 to 105°C (23.0 to 221.0°F)
Temperature Resolution	0.1°C (0.1°F)
Temperature Accuracy (@25°C/77°F)	±0.5°C (±0.9°F)
Temperature Compensation	automatic
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)
Pump Control	selectable flow rate (0.5 to 3.5 L / hour; 0.13 to 0.92 G/hour) manual control for pump priming
Alarms	high and low with enable / disable option 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, light green, and green color-coded backlight
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
Alarm Relay Output	SPDT 2.5A / 230 VAC
Power Supply	100—240 VAC, 50/60 Hz
Power Consumption	15 VA
Casing	wall mounted, built-in pump, IP65 rated
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.)
Ordering Information	HI981412-00 is supplied with 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), aspiration PVC tube (flexible) (5 m), dispensing PE injection tube (rigid) (5 m), 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. HI981412-20 (with flow-cell mounting kit) is supplied with HI981412 controller, HI10063 pH/temperature probe, flow cell for HI981412/BL101, mounting panel assembly for HI981412/BL101, controller aspiration filter, controller injector, 1/2” thread, saddle for Ø 50 mm pipe (3), aspiration PVC tube (flexible) (5 m), dispensing PE injection tube (rigid) (15 m), 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.
Recommended Probe	HI10063 amplified pH/Temperature probe with quick connect DIN connector - galvanically isolated