

HydroRoot 16 Irrigation Controller
The HydroRoot 16 irrigation controller gives commercial growers simple and reliable watering control. It helps you manage irrigation with less manual work and no complicated setup. You get precise control without needing technical expertise.
Key Benefits of HydroRoot 16 Irrigation Controller:
✓ Cost-effective solution: Built on proven Pearl logic, without features you don’t need
✓ Control up to 16 irrigation zones: Run pumps, valves, misting, and fertigation from one compact unit
✓ Flexible watering options: Water by schedule, cycle, accumulated light, soil moisture, or VPD (with optional temperature and humidity sensor)
✓ Remote access through the cloud: Check zones, change schedules, and receive alerts from anywhere
I2C DTH Sensor
24VAC Transformer
Weather Station
$995.00
Shipping calculcated at Checkout | *17% surcharge calculated on all hard goods.
Start Irrigating with Confidence with the HydroRoot 16 Irrigation Controller
Controller:
| 0-10V Analog Outputs | 2 (40mA maximum sink/source current) |
| 0-10V Analog Inputs | 2 |
| Communication Protocol | Modbus RTU |
| Enclosure | Plastic, durable housing – IP65 |
| Power Supply | 24V (AC or DC) |
| Scalability | Additional inputs/outputs expansion modules are available |
I2C Temperature & humidity sensor – Not Included:
| Supply Voltage | 2.4-5.5V |
| Communication | I2C, up to 1 MHz, 2 selectable addresses |
| Temperature accuracy | ±0.3 °C |
| Humidity accuracy | ±2% RH |
| Humidity Range | 0-100% RH |
| Temperature Range | -40 – 125°C |
| Package | 8-Pin DFN, 2.5 x 2.5 x 0.9mm |
| Current Consumption | 2 µA avg, 800 µA measuring |
| Response Time | RH: 86 s, Temp: >2 s |
Transformer – Not Included:
| Output Voltage | 24VAC |
| Maximum Current | 2 Amps |
| Input Voltage | 120VAC |
| Frequency | 60 Hz |
| Type | Class 2, Plug-in Transformer |
| Housing | Flame-Retardant Plastic |
| Operating Temp Range | -20°C to 50°C |
| Certification | UL Listed |
| Dimensions | Approx. 3.5” x 2.5” x 1.5” |
| Cable Type | 18 AWG Stranded (pre-stripped) |
1. How many irrigation zones can the HydroRoot 16 irrigation controller control?
The HydroRoot 16 irrigation controller can manage up to 16 independent irrigation zones per controller card.
2. Which irrigation modes does the HydroRoot 16 have?
The HydroRoot 16 irrigation controller supports scheduled watering, misting/cycling, accumulated light, soil moisture mode, and VPD-based irrigation (sensor required).
3. What types of grow operations is the irrigation controller suited for?
The HydroRoot 16 irrigation controller is ideal for greenhouses, nurseries, open-field farms, research facilities, and university programs. Anywhere precision irrigation is needed across multiple zones.
4. Does the HydroRoot 16 irrigation controller support remote control and monitoring?
Absolutely. With Link4 Cloud, you can view logs, receive alerts, and control irrigation remotely.
5. What power does the HydroRoot 16 irrigation controller require?
It runs on 24VAC power. A compatible 24VAC / 2A transformer is required (sold separately).
6. Is the irrigation controller difficult to install?
Not at all. It comes in a weather-protected IP65 enclosure, pre-wired with terminal blocks, and uses tactile mechanical switches and a sunlight-readable display for easy configuration on-site.
7. Can I access logs and reports of past irrigation events?
Yes. HydroRoot logs every irrigation event, sensor reading, and alarm. These are accessible both on-device and remotely via the Link4 Cloud portal.
8. Is the irrigation controller waterproof since it comes in an IP65 enclosure?
Yes, the IP65 enclosure protects the controller from dust and low-pressure water exposure, making it safe for greenhouse and outdoor use.
9. Does the controller send alerts if power is lost or if irrigation fails to start?
Yes, the HydroRoot 16 can send alerts for power loss or irrigation errors, helping you respond quickly to avoid crop stress.
Link4 Cloud for Web, Android, and iOS
The Link4 Cloud is the latest innovation to Link4’s technology, supporting the new Pearl and HydroRoot controller.
Monitor and set your controllers from anywhere. Create reports, view graphs, and collect data. Log notes using the Grow Journal. Do all of this and more using the intuitive user interface.




























