Senmatic AMI Simplex Fertigation Machine: Precision Fertiliser Mixing for Professional Growers
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Introduction
For professional growers managing high-value crops in greenhouses, nurseries, or large-scale outdoor production, precise control of fertiliser concentration and irrigation water pH is not a luxury — it is a fundamental requirement for consistent crop quality and yield. Inaccurate fertigation leads to nutrient deficiencies, toxicities, and pH-related uptake problems that can be difficult to diagnose and costly to correct.
Simple water-powered injectors like Dosatron units and Tefen venturi injectors are excellent tools for straightforward fertigation, but they have limitations when it comes to managing multiple fertiliser recipes, controlling pH, and providing the data logging and remote management capabilities that modern professional growing operations demand.
The Senmatic AMI Simplex fertigation machine is designed for exactly this level of precision and control. It is a fully automated fertiliser mixer that manages EC, pH, and irrigation scheduling with the accuracy and flexibility that high-value crop production requires.
What Is the Senmatic AMI Simplex?
The AMI Simplex is a professional fertiliser mixer manufactured by Senmatic, a Danish company with decades of experience in precision irrigation and fertigation technology for commercial horticulture. The Simplex focuses on the plants' need for precise fertilisation and accurate acidity in the irrigation water — at the right time — combining high capacity, operational flexibility, and modern connectivity in a single, easy-to-operate unit.
It is available in two pump sizes to suit different system scales, with optional pH control for operations where water pH management is critical.
Key Features
Precise EC Control
The AMI Simplex continuously monitors the electrical conductivity (EC) of the irrigation water and adjusts fertiliser dosing in real time to maintain the target EC set for each recipe. This closed-loop control ensures that the nutrient concentration delivered to the crop is always accurate, regardless of variations in source water EC or fertiliser stock concentration.
EC-based control is far more reliable than simple proportional dosing because it accounts for real-world variables — if a stock tank becomes more dilute as it empties, or if source water EC changes seasonally, the Simplex automatically compensates to maintain the target feed concentration.
Optional pH Control
By adding a venturi injector and pH sensor, the AMI Simplex can be configured to automatically regulate the pH of the irrigation water. The system doses a pH adjustment acid (such as nitric or phosphoric acid) to bring the water to the target pH set for each recipe.
pH control is particularly important for:
- Operations using alkaline mains or borehole water that requires acidification
- Crops with tight pH tolerance ranges, such as blueberries, strawberries, and many greenhouse vegetables
- Hydroponic and substrate growing systems where root zone pH is directly determined by irrigation water pH
- Operations using recirculated water where pH can drift over time
The pH control expansion is available as an optional add-on to the base AMI Simplex unit.
Multiple Fertiliser Recipes
The AMI Simplex supports up to 3 irrigation groups, each with up to 4 different fertiliser recipes. Each recipe stores the target EC, target pH (if pH control is fitted), and the fertiliser mix ratios. This allows the system to automatically switch between different feeding programmes for different crop growth stages, crop types, or zones — without manual intervention.
For example, a nursery growing multiple species could programme different recipes for propagation, establishment, and production stages, and assign different zones to different groups with their own start conditions and schedules.
Zone and Valve Control
The AMI Simplex can control up to 12 solenoid valves, which can be freely assigned across the 3 available groups. Each group can control up to 12 valves, giving significant flexibility in how zones are organised and scheduled. This makes the Simplex suitable for managing multiple greenhouse bays, polytunnel sections, or outdoor production zones from a single central unit.
Two Pump Size Options
The AMI Simplex is available in two configurations to match different system flow rate requirements:
- AMI Simplex 15 m³/hr — suitable for medium-scale operations, typically serving greenhouse complexes or nursery areas with a total irrigation flow rate up to 15,000 litres per hour. Ideal for operations with multiple zones running sequentially.
- AMI Simplex 25 m³/hr — for larger operations with higher flow rate requirements, such as large greenhouse complexes, multi-tunnel nurseries, or outdoor production systems with high simultaneous flow demand.
Choosing the right pump size depends on your peak flow rate requirement — the maximum flow that will pass through the fertigation unit at any one time. Contact the IrriSmart team for help sizing the right unit for your system.
DGT On the Go App
The AMI Simplex is equipped with modern connectivity through the DGT On the Go app, allowing growers to monitor and manage their fertigation programme remotely via smartphone or tablet. This provides:
- Real-time monitoring of EC and pH values
- Remote adjustment of recipes and schedules
- Alarm notifications for out-of-range EC or pH readings
- Data logging for crop records and compliance
Remote monitoring is particularly valuable for operations where the fertigation unit is running overnight or at weekends, allowing issues to be identified and addressed without requiring on-site presence.
Easy Operation
Despite its sophisticated capabilities, the AMI Simplex is designed to be straightforward to operate. The interface is intuitive, and the DGT app provides a clear, accessible view of system status and settings. This makes it accessible to growing teams without specialist technical training, while still providing the depth of control that agronomists and irrigation engineers need.
AMI Simplex vs Simpler Dosing Solutions
Understanding where the AMI Simplex sits in the fertigation landscape helps you decide whether it is the right investment for your operation:
- Dosatron / Tefen TF injectors — water-powered proportional dosing, no EC feedback, no pH control, no data logging. Excellent for straightforward single-recipe fertigation on smaller operations. Lower capital cost.
- AMI Simplex — closed-loop EC control, optional pH control, multiple recipes, zone management, remote monitoring via app. The right choice when precision, multiple crop types or growth stages, pH management, or data logging are required.
The AMI Simplex represents a significant step up in capability and capital investment. For operations growing high-value crops where nutrient precision directly impacts quality and yield, the return on investment is typically rapid.
Senmatic DGT System Compatibility
The AMI Simplex integrates with the broader Senmatic DGT ecosystem, which includes valve decoders, flow sensors, EC and pH sensors, and the DGT decoder interface. This allows the Simplex to be expanded and integrated into a comprehensive irrigation management system as your operation grows.
IrriSmart stocks a full range of Senmatic DGT Systems and Spares, including flow sensors, valve decoders, venturi injectors, and filters, to support the complete Senmatic ecosystem.
Filtration Requirements
As with all precision fertigation equipment, good filtration upstream of the AMI Simplex is essential to protect sensors, venturi injectors, and internal components from particle damage. A minimum of 200 micron filtration is recommended. The Senmatic 3/4 inch 200 micron Arkal filter is specifically designed for use with Senmatic systems and is available from IrriSmart.
Conclusion
The Senmatic AMI Simplex is a professional-grade fertigation machine that delivers the precision, flexibility, and connectivity that modern commercial horticulture demands. With closed-loop EC control, optional pH management, multiple recipe capability, 12-valve zone control, and remote monitoring via the DGT app, it is the right choice for growers who need more than a simple proportional injector can provide.
Available in 15 m³/hr and 25 m³/hr configurations, with optional pH control expansion, the AMI Simplex can be tailored to your operation's specific requirements. View the AMI Simplex range and pricing, or contact the IrriSmart team for a detailed discussion about whether the Simplex is the right solution for your growing operation.