Yes, they connect to any LoRaWAN or MQTT infrastructure (Kerlink, Cisco, Milesight, MultiTech, etc.) for flexible integration with existing SCADA systems.
Digester Temperature Monitoring
Thermal stability tracking for biological efficiency
Temperature
Quick Overview
| Problem | Temperature inside anaerobic digesters is not always continuously monitored at multiple points, limiting visibility on biological process stability. |
| Solution | SENSAiO temperature sensors provide continuous monitoring of digester temperature. |
| Value | Improved visibility on thermal conditions, supporting earlier detection of deviations that may affect biological activity. |
| ATEX | Designed for biogas environments, compliant with ATEX / IECEx requirements for explosive gas atmospheres. |
The Operational Challenge
Anaerobic digesters rely on controlled temperature conditions to sustain microbial activity responsible for biogas production.
Typical operating regimes include:
- Mesophilic digestion (~35–40°C)
- Thermophilic digestion (~50–55°C)
From a physical perspective:
- Temperature directly influences microbial metabolism rates
- Heat transfer occurs through mixing, heating systems, and substrate input
- Thermal gradients may develop within the digester volume
Operational challenges include:
- Uneven temperature distribution
- Heat losses through tank walls or piping
- Variability due to feedstock temperature
- Mixing inefficiencies leading to stratification
Common issues include:
- Temperature drift outside optimal biological range
- Localized cold or hot zones
- Heating system underperformance
- Process instability due to thermal fluctuations
Detection challenges include:
- Limited number of measurement points
- Intermittent or manual readings
- Difficulty capturing internal gradients
- Lack of continuous monitoring trends
As a result, temperature deviations may impact process performance without immediate detection.
Why Temperature Monitoring Matters
Temperature is a key parameter for biological process stability.
By continuously monitoring temperature:
- Process conditions can be tracked in real time
- Deviations from target operating ranges can be detected
- Thermal trends and gradients can be observed
Typical interpretations include:
- Decreasing temperature may indicate heat loss or insufficient heating
- Increasing temperature may indicate excess heat input or reduced dissipation
- Fluctuations may correlate with feedstock changes or mixing variations
Temperature data reflects the thermal environment influencing biological activity.
SENSAiO Solution
SENSAiO deploys wireless temperature sensors installed on:
- Digester walls or external points
- Associated piping systems
- Accessible measurement locations
Sensors measure temperature and transmit data via LoRaWAN to a centralized monitoring platform.
The system provides:
- Continuous temperature monitoring
- Trend analysis over time
- Alerts on abnormal temperature deviations
It is important to clarify that:
- SENSAiO is a monitoring-only system
- It does not control heating systems
- It does not regulate biological processes
- It does not optimize digestion performance automatically
The system supports operational awareness and process monitoring.
Results and ROI
ATEX Compliance and Safety
Digesters operate in explosive biogas atmospheres. SENSAiO sensors:
- Are available with ATEX / IECEx certification
- Are suitable for hazardous gas environments
- Are designed for industrial classified zones
All equipment is delivered with appropriate certification documentation.
SENSAiO systems are not safety systems and do not replace process control systems, safety monitoring, or regulatory requirements.
Integration and compatibility
| Protocols | LoRaWAN, MQTT, REST API |
| Gateways | Compatible with standard LoRaWAN gateways (Kerlink, Multitech, Cisco, etc.) |
| Systems | Integration with biogas plant monitoring platforms |
| Deployment | Suitable for retrofit on existing digesters and piping systems |
FAQ - Common Questions
Are Sensa.io sensors compatible with any gateway or network?
What ATEX certifications apply to Sensa.io devices?
All hazardous-area models are certified Ex II 2 G Ex ia IIC T4 Gb and IECEx approved for Zones 0–2.
What is the typical battery life?
Up to 10 years at 15-minute intervals, depending on signal strength and environment.
How are the sensors integrated into existing systems?
Through standard protocols — LoRaWAN, Modbus, MQTT, REST API — no proprietary middleware needed.
How does predictive maintenance reduce OPEX?
Early anomaly detection reduces emergency interventions by 30–40 %, extends equipment life and lowers energy costs.
What does the Sensa.io Valve Position Sensor actually measure?
The device detects real-time valve position states—open, closed, or intermediate—with high accuracy. It continuously sends this information wirelessly to your monitoring dashboard.
Can this sensor detect partial valve movement or stuck valves?
Yes. The sensor identifies irregular patterns such as partial movement, delayed response, or stuck valves, enabling early maintenance before failure occurs.
Is this sensor suitable for manual, motorized, and actuated valves?
Yes. It supports a wide range of valve types including ball, gate, butterfly, actuator-driven, and manual valves.
How fast does it update the valve position?
You can configure the reporting interval—from seconds to minutes—depending on your operational and battery needs.
How long does installation take?
Most installations take under 10 minutes. The sensor mounts using brackets or clamps without modifying existing valves.
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The SENSAiO acoustic sensor identifies ultrasonic leak signatures, gas escape, steam trap failures, and flare noise anomalies.
Trusted by a Worldwide Network
With partners in over 20 countries, SENSAiO delivers rugged sensor solutions to the toughest environments — everywhere.
