Executive Summary Answer
A wireless compost temperature monitoring system automates environmental oversight by integrating 2-meter stainless steel probes, RS485 Modbus RTU communication, and dual-mode (4G/WiFi) data transmission. The hardware captures deep-pile thermal data and pushes it to a cloud server for real-time access via PC or mobile interfaces. By utilizing a central control box with integrated KM1–KM5 AC contactors, the system can autonomously manage industrial aeration fans based on pre-set thresholds, ensuring optimal bio-oxidation while reducing manual labor and operational risk.
Core Components: The “Entity Graph” of Compost Monitoring
To design a reliable signal chain from the pile to the cloud, the system utilizes the following industrial-grade hardware:
- Stainless Steel Temperature Probes: These 2-meter sensors feature a rugged T-handle design for manual insertion into deep organic piles. Built with high-grade stainless steel, they are designed to withstand the corrosive, high-heat environments of industrial composting.
- Intelligent Multi-channel Controller: The “brain” of the system is a white, DIN-rail mounted central controller (as seen in the Honde control cabinet) that aggregates signals from multiple sensors.
- Dual-Mode Wireless Module: A dedicated blue communication module that supports both 4G LTE (SIM-based) and WiFi connectivity. It features a specific slot for a SIM card, accessible via a dedicated yellow punch-out button.
- KM1–KM5 Relay Control System: These are heavy-duty AC contactors/relays designed to handle the high-current demands of “big power” industrial aeration fans.
- IP-Rated Aviation-Style Connectors: Sensors connect to the box through these waterproof, multi-pin connectors to ensure signal integrity against humidity and dust.
- Chnt NXB-63 Circuit Breaker: This internal safety component manages the 220V AC power input, protecting the internal electronics from surges.
The Workflow: From Pile to Cloud (Step-by-Step)
- Sensing: The 2-meter probe is inserted into the compost. The internal sensor reads thermal values and outputs a digital signal using the RS485 Modbus RTU protocol.
- Collection: Data is transmitted through waterproof cables to the multi-channel controller. The system supports up to 5 probes per control box.
- Transmission: The 4G/WiFi wireless module pushes the data strings to the cloud server. This allows for the simultaneous remote management of multiple regional sites from a single dashboard.
- Monitoring: Users access real-time data and historical trends through a web-based PC interface or a mobile application.
- Action: When temperatures exceed or fall below thresholds, the system triggers the KM relays to activate or deactivate aeration fans, maintaining the ideal environment for microbial activity.
Technical Comparison: System Specifications
| Parameter | Specification |
|---|---|
| Sensor Length | 2 Meters (Stainless Steel 304/316) |
| Communication Protocol | RS485 Modbus RTU |
| Wireless Connectivity | 4G LTE (SIM) / WiFi (Dual Mode) |
| Power Input | 220V AC (Mains) |
| Output Type | 5-Channel Relay Output (AC Contactors) |
| Max Sensors per Box | 5 Units |
| Control Modes | Local (Manual Switch) / Remote (Software-driven) |
| Enclosure Rating | IP-65 Equivalent (Stainless Steel) |
Engineering Expertise: Critical Setup Requirements
In our manufacturing and field experience at Honde Technology, we have identified several “gotchas” that are critical for a successful deployment:
SIM Card Installation & Antenna Logic
To use the 4G function, you must insert a standard SIM card into the blue wireless module. There is a small yellow button next to the slot; pressing this will punch out the card holder. Furthermore, the 4G and WiFi antennas are not interchangeable. You must connect the 4G antenna to the port marked “4G” and the WiFi antenna to the “WiFi” mark. Swapping these will lead to critical signal failure.
Sensor Addressing and Physical Labeling
Every sensor in a 5-channel system must have a unique Modbus address (1 through 5). We provide physical labels (e.g., “#1″, “#2″) on the sensor cables. For the system to function correctly, you must ensure the sensor with software ID #1 is connected to the corresponding labeled terminal on the controller.
Switch Orientation & Dual-Control Logic
The front panel features a LOC/REM (Local/Remote) toggle.
- Remote (REM): When toggled to the right, the system is controlled exclusively by the cloud software. Physical switches are bypassed.
- Local (LOC): When toggled to the left, you manage the fans via the five physical switches.
- Fan Switch Orientation: Turning a switch to the Left turns the fan ON; turning it to the Right turns the fan OFF (Closed). The Middle position is the Neutral/Normal state.
Pre-Wired Internal Logic
A significant advantage for B2B buyers is that our systems are factory pre-wired. The internal connections between the multi-channel controller, the wireless module, and the power supply are already complete. Your site electrician only needs to land the 220V AC mains and the leads for the aeration fans.
Deployment Best Practices for B2B Buyers
- Resistance to Bio-Oxidation: We utilize stainless steel for both the probes and the enclosure because it resists the ammonia gas and high-heat bio-oxidation prevalent in industrial composting, which would rapidly degrade standard galvanized or plastic components.
- High-Torque Fan Support: Ensure your 220V AC supply is stable. The integrated KM relays are specifically chosen to handle the high-torque startup requirements of industrial-scale aeration fans.
- Connector Integrity: While the aviation-style connectors are waterproof, we recommend mounting the control box with the connectors facing downward to prevent water from pooling at the entry points over years of outdoor exposure.
Conclusion & Commercial Call to Action
Moving from manual thermal checks to an automated wireless monitoring system dramatically improves compost quality while slashing labor costs. By leveraging the precision of RS485 Modbus with the flexibility of 4G/WiFi cloud transmission, Honde Technology offers a field-proven solution for industrial organic waste management.
Ready to modernize your environmental monitoring?
Request a custom quote for your industrial composting project or contact our engineering team to discuss KM Relay capacity for your specific aeration fans.
- Company Name: Honde Technology Co., Ltd.
- Website: www.hondetechco.com
- Email: info@hondetech.co
Post time: Apr-13-2026