Hanna HI981413-20 GroLine Nutrient dosing system

Hanna HI981413-20 GroLine Nutrient dosing system

The Hanna HI981413-20 GroLine Nutrient dosing system  is a professional-grade nutrient dosing controller designed to monitor and regulate EC or TDS levels in nutrient solutions with high precision. Equipped with advanced proportional and on/off dosing control, automatic temperature compensation, and fail-safe features, this system is ideal for high-efficiency hydroponics, fertigation, and greenhouse automation.

With flexible dosing logic, programmable alarms, and smart integration options, the HI981413-20 provides growers and facility managers with full control over nutrient management for optimized plant growth and reduced resource waste.

Features

• Automatic Temperature Compensation
  Ensures EC/TDS measurements remain accurate across varying temperatures for consistent dosing control.

• Adjustable Temperature Correction Coefficient (β)
  Customizable from 0%/°C to 2.4%/°C (default: 1.9%/°C) to match crop-specific nutrient temperature response.

• Advanced Dosing Control

  • On/Off Dosing: Adjustable set point (0.10 to 10.00 mS/cm or 50 to 5000 ppm)

  • Proportional Dosing: Adjustable proportional band (0.05 to 1.00 mS/cm or 25 to 500 ppm) for fine dosing adjustments

  • Adjustable hysteresis in on/off mode (0.05 to 0.50 mS/cm or 25 to 250 ppm)

• Flexible Dosing Activation Modes

  • High Set Point: Activates dosing when reading exceeds the set value

  • Low Set Point: Activates dosing when reading is below the set value (common for fertilizer injection)

• Smart Dosing Safeguards

  • Startup Delay: Configurable from 0 to 600 seconds after power-up

  • Overtime Safety Timer: Prevents overfeeding with cutoff between 1 to 180 minutes (or OFF)

• Customizable Pump Flow Control

  • Selectable flow rate from 0.5 to 3.5 L/hour

  • Manual priming function for easy pump setup and maintenance

• Built-In Alarm System

  • High/Low Limit Alarms: Activates after 5 seconds of sustained readings beyond set thresholds

  • Visual Indicators: Red, light green, and green backlit display for alarm status

  • Alarm Relay Output: SPDT, 2.5A / 230 VAC for external control or alert systems

• Safety Input Integration

  • External event input allows level controller or flow switch to stop dosing during no-flow or low-level conditions

  • All critical inputs and probes are galvanically isolated to prevent interference

• Quick-Connect Probe Input
  Compatible with HI-30033 EC/TDS/Temperature probe, featuring a DIN connector for fast, secure installation

Specifications

• Model: HI981413-20 GroLine

• Measurement Parameters: EC, TDS, Temperature

• Dosing Control Types:

  • On/Off with hysteresis

  • Proportional with adjustable dosing range

• Set Point Range: 0.10 to 10.00 mS/cm (50 to 5000 ppm)

• Temperature Compensation: Automatic

• Temperature Correction Coefficient (β): Adjustable from 0 to 2.4%/°C (default 1.9%/°C)

• Startup Delay Timer: 0 to 600 seconds

• Maximum Dosing Time: 1 to 180 minutes or OFF

• Pump Flow Rate Control: 0.5 to 3.5 L/h (0.13 to 0.92 G/h)

• Alarm Relay Output: SPDT 2.5A / 230 VAC

• External Input: For level controller or flow switch

• Probe Input: HI-30033 EC/TDS/Temperature probe (galvanically isolated)

• Power Supply: 100–240 VAC, 50/60 Hz

• Power Consumption: 15 VA

• Operating Conditions: 0–50°C (32–122°F), max. 95% RH (non-condensing)

• Dimensions: 90 × 142 × 80 mm (3.5 × 5.6 × 1.8″)

• Weight: 910 g (32 oz)

Applications

• Hydroponics and Soilless Agriculture
  Enables precise EC/TDS management for optimal nutrient uptake and healthy plant growth.

• Greenhouse Fertigation Systems
  Automates nutrient delivery with programmable logic and feedback from flow or level controllers.

• Commercial Nurseries and Vertical Farming
  Supports scalable, automated nutrient management across multiple zones or irrigation loops.

• Research and Agronomic Studies
  Provides accurate, real-time nutrient monitoring for experimental or controlled growth environments.

• Environmental Agriculture and Water Reuse
  Ensures safe and efficient nutrient dosing in systems using reclaimed or recycled water.