Retrofit Package
Modernize your greenhouse operations with precision automation without tearing out your existing system. Link4’s Retrofit Packages are engineered for growers ready to scale, streamline, and strengthen control.
Basic Package Includes:
✓ Ready-to-use controller (no setup needed)
✓ Internet connection for remote control
✓ Air temperature and humidity sensor
✓ Easy-to-follow installation drawings
✓ 5 years of Cloud access
Watch a retrofitting in action here and see how effortless upgrading your system can be.
Shipping calculcated at Checkout | *17% surcharge calculated on all hard goods.
Upgrade Your Confidence in Scaling Smarter
EnviroStep Retrofit in Action
- Integrated UL508A Panel
- 6 contactors: 3-pole, 18Amp
- 10 pilot relay outputs
- Ethernet, USB, Wi-Fi, 4G*
*check for availability - 5 isolated Modbus RTU ports
Temperature and Humidity Sensor – Included
| Temperature Range | –20 °C to +80 °C (noncondensing) |
| Humidity range | 10% to 90% RH (noncondensing) |
| Temperature accuracy | ±0.5 °C |
| Humidity accuracy | ±2% RH |
| Power supply | 24VDC |
| Communication | Modbus RTU |
| Radiation shield | Included (standard) |
| Cable | 10 ft from shield to junction box |
| Mounting | Radiation shield and external enclosure |
Weather Station – Included
| Wind Speed | 0–60 m/s (±0.3 m/s) |
| Wind Direction | 0–359° (±3°) |
| Temperature | –20 °C to +80 °C (±0.5 °C) |
| Humidity | 10–90% RH (±2% RH) |
| Output | Modbus RTU |
| Power Supply | 24VDC |
| Data Update Rate | 1 Hz (typical) |
| Cable Interface | 4-conductor 22 AWG, twisted pairs, shielded, stranded cable |
| Light Measurement | 0 – 1200 W/m2 |
1. Can I choose my relay output configuration?
Yes! The package is available with 12, 24, or 40 relay outputs, so you can pick what best fits your operational needs.
2. Does the Retrofit Package come with cloud access?
Yes! All options include an Ethernet connection and a 5-year prepaid Link4 Cloud subscription for real-time monitoring and alerts.
3. Will this work with my current system?
Yes! Our retrofit packages are designed to integrate with your existing infrastructure, whether it's legacy Wadsworth, Argus, Priva, or something custom.
4. How hard is it to install?
You can watch this real-life retrofitting in action and see how effortless this process can be.
5. Can I access data remotely?
Absolutely. Every package connects to Link4 Cloud, giving you real-time access and control from your phone, tablet, or PC.
6. What crops or facility sizes are best suited?
Our retrofit solutions are ideal for CEA greenhouses, indoor farms, and research facilities.
7. How do I decide between 12, 24, or 40 outputs — what’s the difference?
The number of outputs corresponds to how many devices you want to control. Choose 12 for small setups, 24 for medium, and 40 for larger facilities.
8. What does UL508A-rated panel mean, and why is it important?
UL508A certification ensures the panel meets strict safety and reliability standards for industrial control systems, protecting your equipment and operators.
9. What happens if internet goes down? Will the system still work?
Yes, the system continues running locally even without the internet. Cloud access is only needed for remote monitoring and updates.
10. How are firmware updates handled automatically via the cloud or manually?
Firmware updates are delivered automatically via the cloud when connected, or they can be applied manually if needed.
11. What’s the maximum load (amps/voltage) each output relay can handle safely?
Each output relay is rated for standard industrial loads, typically up to 120/240V and 10A, ensuring safe operation of most greenhouse equipment.
Link4 Cloud for Web, Android, and iOS
The Link4 Cloud is the latest innovation to Link4’s Cloud technology, supporting the new Pearl controllers.
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.
