Yes, they connect to any LoRaWAN or MQTT infrastructure (Kerlink, Cisco, Milesight, MultiTech, etc.) for flexible integration with existing SCADA systems.
< Industries/
offshore-oil-gas
ATEX-Certified Monitoring for LNG and Cryogenic Storage Tanks and Transfer Systems
LNG and cryogenic infrastructure includes liquefaction plants, regasification terminals, cryogenic storage tanks, transfer lines, boil-off gas (BOG) systems, cryogenic pumps, and vent stacks. These assets operate under extreme temperature conditions (down to –162°C for LNG), high internal pressure regimes, and significant thermal cycling.
Mechanical stress, seal degradation, insulation failure, valve misalignment, and vibration-related fatigue are common operational risks. Many components are located in hazardous areas due to hydrocarbon vapor presence.
While core process parameters are managed by DCS and safety systems, additional distributed monitoring points are often limited by installation complexity in cryogenic environments.
SENSAiO provides wireless LoRaWAN monitoring sensors for valve position, pressure, temperature, differential pressure, vibration, and acoustic behavior. SENSAiO is monitoring-only. It does not replace cryogenic process control, tank protection systems, ESD logic, or certified gas detection. It extends visibility on selected physical phenomena to support earlier anomaly detection and maintenance planning.
The Operational Challenge
Cryogenic systems present unique degradation and operational challenges:
- Thermal contraction and expansion causing mechanical stress
- Seal and gasket performance degradation under low temperature
- Boil-off gas pressure fluctuation
- Cryogenic pump vibration under cavitation or bearing wear
- Progressive restriction in cryogenic filtration systems
- Intermittent vent stack discharge events
Because temperature gradients and mechanical stress evolve over time, early-stage deviations may not immediately trigger process alarms. However, delayed detection can result in efficiency loss, excessive boil-off gas handling, or unplanned intervention.
Operational need focuses on:
- Earlier detection of abnormal pressure or temperature drift
- Improved visibility on cryogenic valve state
- Mechanical degradation monitoring of rotating equipment
- Faster investigation of vent and discharge anomalies
The objective is enhanced condition visibility without altering certified safety architecture.
Why ATEX and Continuous Monitoring Matter
LNG facilities frequently include classified hazardous zones due to flammable vapor presence during storage, transfer, and regasification.
Equipment must comply with ATEX Directive 2014/34/EU and IECEx schemes where applicable. Hazardous-area classification and zoning determination remain the operator’s responsibility.
Continuous monitoring is particularly valuable in cryogenic systems because:
- Thermal deviations may indicate insulation degradation
- Pressure drift may precede relief activation
- Cavitation-related vibration may grow progressively
- Vent discharge events may be intermittent
Monitoring provides early-stage evidence of deviation. It does not replace engineered protective layers such as tank pressure relief systems, emergency shutdown systems, or certified gas detection.
Core Use Cases for
LNG & Cryogenic Infrastructure
Use Case
Sensor Type
ATEX
ROI/Value
Cryogenic Filter Differential Pressure Monitoring
Differential Pressure (ΔP)
Restriction progression tracking
LNG Cryogenic Temperature Monitoring
Temperature
Thermal deviation tracking and insulation performance visibility
Cryogenic Valve Position Verification
Valve position
Reduced misalignment risk during transfer and isolation
No items found.
Vibration
Acoustic
Differential Pressure (ΔP)
Temperature
Pressure
Valve position
Detailed Use Case Descriptions
1) Cryogenic Valve Position Verification
Cryogenic transfer systems rely on correct valve sequencing during loading, unloading, and maintenance isolation. Misalignment may cause flow instability or operational delay. Valve position monitoring provides time-stamped confirmation of opening percentage, supporting remote verification prior to transfer operations. SENSAiO does not actuate cryogenic valves, does not verify sealing performance at low temperature, and does not replace ESD interlocks. It provides monitoring visibility only.
2) LNG Transfer Line Pressure Monitoring
Transfer lines operate under tightly controlled pressure conditions to maintain stable LNG flow. Pressure deviations may result from blockage, valve restriction, or operational transitions. Continuous monitoring allows earlier identification of sustained drift or transient pressure anomalies. This supports investigation before process alarms escalate. SENSAiO does not regulate transfer pressure and does not replace control transmitters connected to DCS.
3) Boil-Off Gas (BOG) Pressure Monitoring
BOG systems manage vapor generated by heat ingress. Abnormal pressure behavior may indicate imbalance between vapor generation and compression capacity. Monitoring pressure trends supports earlier detection of instability patterns, enabling operators to assess compressor load or venting behavior. SENSAiO does not replace BOG control systems, tank pressure protection devices, or relief valves. It provides additional monitoring visibility for investigation support.
4) LNG Cryogenic Temperature Monitoring
Cryogenic insulation degradation or unexpected thermal ingress may result in temperature deviation within storage or transfer systems. Continuous temperature monitoring allows detection of sustained deviation from baseline thermal profiles. This may support earlier insulation inspection or performance review. SENSAiO temperature sensors provide monitoring data only and do not replace certified cryogenic measurement systems required for process control or custody transfer.
5) Cryogenic Filter Differential Pressure Monitoring
Cryogenic filtration protects pumps and downstream equipment from particulates. Restriction increases differential pressure gradually. Continuous DP trending enables operators to monitor restriction rate-of-change and align maintenance scheduling accordingly. Differential pressure monitoring does not measure flow rate or identify contaminant type. It provides resistance trend visibility.
6) LNG Pump Vibration Monitoring
Cryogenic pumps operate under extreme temperature and high load conditions. Cavitation, bearing wear, or imbalance may generate vibration deviation. Vibration monitoring establishes a baseline and highlights progressive change. Early recognition supports inspection planning before mechanical damage escalates. SENSAiO does not perform automated failure prediction or root cause classification. Engineering interpretation remains necessary.
7) Vent Stack Acoustic Monitoring
Vent stacks handle controlled discharge events. Abnormal acoustic patterns may indicate intermittent venting or unstable vapor release. Acoustic monitoring detects changes in sound energy that may correlate with these events. It supports faster anomaly triage and event timestamp correlation. SENSAiO does not measure gas composition, confirm vent flow rate, or replace certified gas detection systems.
How SENSAiO Technology Works
| Open Wireless Architecture | LoRaWAN enables distributed monitoring in cryogenic facilities without expanding signal cabling. Transmission intervals are configurable to balance responsiveness and battery life. Network validation is required per site. |
| Sensor Design | Sensors are industrial, battery-powered devices designed for deployment in hazardous and low-temperature environments. They measure valve position, pressure, temperature, differential pressure, vibration, and acoustic behavior. They do not execute control actions. |
| Integration | SENSAiO integrates alongside DCS, historian, and reliability platforms. It does not modify control logic or participate in safety functions. |
| Data Intelligence | Trend-based analysis and anomaly detection highlight deviation from baseline behavior. Interpretation remains under operator responsibility. |
ATEX Compliance and Safety
LNG and cryogenic facilities frequently include hazardous areas classified due to the presence of flammable hydrocarbon vapors during storage, transfer, regasification, and boil-off gas handling.
Equipment installed in these zones must comply with applicable explosion protection regulations.
SENSAiO devices are designed for deployment in hazardous areas in accordance with:
- ATEX Directive 2014/34/EU (European Union market)
- IECEx certification scheme (international markets, including North America, Middle East, and Asia-Pacific)
Certification applies to the equipment category and protection concept as defined in the product documentation.
Final hazardous area classification (Zone 0, Zone 1, Zone 2), equipment selection, and installation validation remain entirely the responsibility of the operator and must follow site-specific hazardous area studies and applicable national regulations.
SENSAiO sensors are intrinsically safe field devices intended exclusively for monitoring applications in classified environments. They do not:
- Replace Emergency Shutdown Systems (ESD)
- Replace tank pressure protection systems
- Replace certified gas detection systems
- Provide risk reduction credit under IEC 61508 / IEC 61511
- Function as engineered safety layers
Their role is limited to measurement and wireless transmission of physical parameters such as pressure, temperature, differential pressure, vibration, acoustic behavior, and valve position.
SENSAiO contributes to safer operations by improving condition visibility in hazardous areas—not by replacing certified protective systems.
Proven ROI and Field Results
In LNG and cryogenic infrastructure, ROI is driven by earlier anomaly detection and improved maintenance timing.
Potential Value Areas
- Reduced transfer interruption due to valve misalignment
- Earlier insulation degradation visibility
- Improved BOG instability investigation speed
- Reduced unplanned pump intervention
- Faster vent event investigation
Conservative, Site-Dependent Performance Ranges
Operators may observe:
- 10–30% reduction in non-critical verification trips
- 15–35% earlier identification of restriction or thermal deviation trends
- 10–25% increased maintenance planning lead time for cryogenic pumps
- 20–40% faster investigation cycle time for vent anomalies
These ranges are indicative and not guaranteed. SENSAiO does not prevent boil-off gas generation or eliminate mechanical degradation. It supports earlier evidence-based intervention.
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.
General & Functionality
No items found.
Specific Technical Questions/
LNG & Cryogenic Infrastructure
Can SENSAiO be used in classified LNG areas?
Yes, when installed according to ATEX Directive 2014/34/EU and IECEx certification parameters. Hazardous-area classification remains the operator’s responsibility. Installation must comply with certified protection concepts and site procedures. SENSAiO devices are intrinsically safe monitoring instruments. They are not engineered safety layers and do not provide risk reduction credit.
Does SENSAiO contribute to boil-off gas reduction?
SENSAiO does not directly reduce boil-off gas generation. It does not regulate tank pressure or compressor operation. However, earlier detection of pressure instability, insulation-related temperature drift, or vent anomalies may support earlier corrective action, which can indirectly reduce operational inefficiency. Any performance improvement depends on engineering response and operational discipline.
Is wireless monitoring reliable in cryogenic environments?
Wireless deployment depends on proper antenna placement and site validation. LoRaWAN enables distributed monitoring without expanding signal cabling, but coverage assessment is necessary before deployment. SENSAiO complements DCS architecture and does not replace primary telemetry. Communication parameters can be configured to balance update frequency and battery life.
Can acoustic monitoring detect vent stack anomalies?
Acoustic monitoring can detect changes in sound energy patterns associated with intermittent vapor discharge or unstable vent behavior. It does not measure vent flow rate, gas composition, or confirm regulatory compliance. It provides time-stamped anomaly indicators that support investigation and correlation with process events. Engineering interpretation remains required to determine operational significance.
How does vibration monitoring help in cryogenic pump reliability?
Cryogenic pumps operate under extreme thermal contraction and high load. Bearing wear, imbalance, and cavitation can generate measurable vibration deviation before performance loss is visible. Vibration monitoring establishes a baseline and highlights trend deviation over time. It does not automatically diagnose root cause or predict exact failure timing. The benefit lies in extending maintenance planning lead time and reducing unplanned intervention in cryogenic service.
What type of cryogenic temperature deviation can be detected?
Temperature monitoring can reveal sustained deviation from established baseline conditions, which may indicate insulation degradation, abnormal heat ingress, or process imbalance. However, temperature data alone does not quantify insulation damage or calculate boil-off rate increase. It provides trend-based evidence requiring engineering correlation with operating load, tank level, and process conditions. SENSAiO does not replace custody transfer measurement or certified cryogenic control instrumentation.
Can SENSAiO pressure monitoring detect LNG transfer leaks?
Pressure monitoring may detect abnormal deviations that correlate with transfer irregularities. When combined with acoustic indicators, anomaly investigation may be accelerated. However, SENSAiO does not replace certified leak detection systems, does not calculate mass balance, and does not confirm leak rate or location. It provides distributed monitoring evidence that supports engineering triage and event reconstruction. Leak confirmation remains dependent on established detection systems and field procedures.
Does SENSAiO replace certified LNG tank protection systems?
No. LNG storage tanks are protected by engineered systems including pressure relief valves, emergency shutdown (ESD), and tank protection instrumentation designed under strict standards. SENSAiO does not replace or duplicate these systems. It does not provide overpressure protection logic, risk reduction credit, or automatic shutdown capability. Its role is limited to monitoring selected physical variables—such as pressure, temperature, vibration, and acoustic behavior—to provide earlier visibility of deviation trends. Protective systems remain independent and unchanged
Protect Cryogenic Systems from Failure
Monitor pressure and temperature continuously across LNG storage and transfer infrastructure to prevent hazardous events.
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