GroLine pH Dosing System meter, probe and panel mounted flow cell kit

GroLine pH Dosing System (HI981412) – Advanced Nutrient & Irrigation Control

Brand Chemical Supplies is a premier distributor of the Hanna Instruments GroLine HI981412, a specialized pH controller and automated dosing system designed for the South African horticultural and hydroponics industries. This system ensures that nutrient solutions and irrigation water remain within the precise pH window required for optimal nutrient uptake and plant health, effectively automating one of the most critical daily tasks in professional growing.

Technical Specifications

Key Features & Benefits

• Automated Proportional Dosing: Unlike basic “On/Off” controllers, the HI981412 uses advanced proportional control to slow down dosing as the set point is approached. This prevents the “overshooting” of acid/base levels that can shock delicate root systems

• Integrated Panel-Mounted Flow Cell: The “20” configuration includes a professional flow cell and mounting panel. This allows the probe and injector to be mounted externally to the main irrigation pipe, protecting the sensor from turbulence and making maintenance simple without shutting down the entire system.

• Multicolored Status Display: The high-contrast LCD changes color based on system status: Green (Normal), Yellow (Nearing alarm limits), and Red (Active alarm state). This allows for at-a-glance monitoring across a busy greenhouse.

• High-Durability Stepper Motor: The built-in peristaltic pump uses a stepper motor rather than traditional gears, providing a significantly longer lifespan and quieter operation with minimal mechanical wear.

• Fail-Safe Protection:

  • Overtime Protection: Automatically stops dosing if the pH set point isn’t reached within a defined time (preventing tank emptying in the event of a leak).

  • Low Reagent Input: Connects to an optional level switch to disable the pump if the chemical reservoir is empty.

• Amplified “Quick-Connect” Probe: The HI10063 probe features a built-in amplifier to reduce electrical noise from pumps and motors, ensuring stable readings even in complex industrial environments.

Primary Applications

• Small to Medium Hydroponic Systems: Maintaining stable pH in recirculating deep water culture (DWC) or nutrient film technique (NFT) setups.

• Commercial Greenhouses: Automating pH adjustment in large mixing tanks or fertigation lines for flower and vegetable production.

• Nursery Irrigation: Ensuring consistent water quality for sensitive saplings and mother plants.

• Aquaponics: Providing precise pH control to balance the needs of both fish and plant life.

What’s Included in the Kit?

• HI981412 Controller & Dosing Pump

• HI10063 Amplified pH/Temperature Probe

• Panel-Mounted Flow Cell Assembly

• Suction & Discharge Tubing (5m flexible / 5m rigid)

• Aspiration Filter & Injection Valve

• pH 4.01 & 7.01 Calibration Buffers (20 mL sachets)

Contact our horticultural technical team today to secure your GroLine pH Dosing System and automate your precision growing environment