INFWIN DigiLTN Lightning Sensor
The INFWIN DigiLTN is a lightning sensor with SDI-12 or RS485/Modbus-RTU output, built around the AMS AS3935 lightning sensing chip. It is an advisory instrument that detects cloud-to-ground, intra-cloud, and cloud-to-cloud discharges within a 40 km (24 mile) radius. Power supply, output interface, connector type, and cable length are configurable via ordering code - the default variant (DigiLTN-AAAB002) ships with lightning detection, RS485/Modbus-RTU output, 5–28V DC supply, a cold-pressed terminal connector, and a 2 m cable.
DigiLTN reports strike count, estimated distance to the storm head, relative energy of the last strike, and rolling strike/noise/disturber counts over several time windows. An embedded man-made disturber rejection algorithm and user-configurable detection thresholds help reduce false detections. Reverse power protection and built-in TVS/ESD protection are included.
Key Features
- Integrated AMS AS3935 lightning sensor
- 40 km detection radius: Warns of lightning storm activity within a 40 km (24 mile) radius
- Distance estimation: 15 steps, from overhead to 40 km
- Detects both discharge types: Cloud-to-ground and intra-cloud (cloud-to-cloud) flashes
- Disturber rejection: Embedded man-made disturber rejection algorithm reduces false detections
- Configurable detection thresholds: Programmable detection levels for optimal control in different environments
- Rich detection data: Strike count, noise count, disturber count, distance estimate, relative strike energy, and rolling 10/30/60-minute counts
- Digital output: SDI-12 (V1.3) for universal datalogger compatibility and low-power use, or RS485/Modbus-RTU for long cable runs or multi-sensor networks, both with built-in surge protection
- Compact size: 111 × 25.5 mm sensor body
- Reverse power protection: Built-in TVS/ESD protection
- Connector options: Cold-pressed terminal or stripped & tinned lead wires
- Configuration utility: SensorOneSet software (RS485) or SensorOneSetSDI12 software (SDI-12) included for sensor configuration
- Cable length: 2 m standard; custom lengths available
Applications
- Industrial applications
- Weather research
- Safety management
- System integration where advisory storm data supports safety and management decisions
Important Notes
- DigiLTN is an advisory instrument, not a precision instrument - it indiscriminately detects cloud-to-cloud, intra-cloud, and cloud-to-ground discharges and reports an approximate distance and strike count rather than exact strike location.
- Typical detection efficiency is approximately 40%, and depends on the use environment and level of ambient man-made electromagnetic noise.
- Detection thresholds are user-configurable; raising them reduces false detections in noisy industrial environments but also reduces genuine lightning detection.
- Consecutive strikes are reported with a minimum 1 second span between events.
Specifications
| Lightning Detection | |
| Storm head range estimate | 15 values, 0–40 km (0–24 miles) |
| Consecutive strike span | 1 s |
| Detection efficiency | Approximately 40% (environment-dependent) |
| Reported parameters | Strike count since last read; noise count since last read; disturber count since last read; distance estimation; relative energy of last strike; strike count (10 min, 30 min, 60 min); noise count (60 min); disturber count (60 min) |
| Electrical | |
| Output interface | RS485 (Modbus-RTU) or SDI-12, V1.3 (selectable via ordering code) |
| Power supply | 5–28V DC |
| Quiescent current | SDI-12: <400 µA @ 12V DC; RS485: <1.2 mA @ 12V DC |
| Max. current during lightning detected | SDI-12: <5 mA @ 12V DC; RS485: <6 mA @ 12V DC |
| Mechanical | |
| Dimensions | 111 × 25.5 mm (sensor body, length × diameter) |
| IP rating | IP68 |
| Connector | Cold-pressed terminal or stripped & tinned lead wires (selectable via ordering code) |
| Cable length | 2 m standard; custom length available |
| Installation | Wall mounting |
| Environmental | |
| Operating conditions | −40°C to +80°C; 0–100% humidity |
Ordering Code Guide
| Code 1: Product Series | DigiLTN | DigiLTN lightning sensor |
| Code 2: Parameters | A | Lightning detection |
| Code 3: Power Supply | A X |
5–28V DC Customize |
| Code 4: Output Interface | A B |
RS485 (Modbus-RTU) SDI-12 |
| Code 5: Connector | B C |
Cold-pressed terminal Stripped & tinned lead wires |
| Code 6: Cable Length | 002 XXX |
2 meters Custom (XXX = length in meters) |
Default Variant: DigiLTN-AAAB002
| Measuring parameters | Lightning detection |
| Power supply | 5–28V DC |
| Output interface | RS485, Modbus-RTU |
| Connector | Cold-pressed terminal |
| Cable length | 2 meters |
Custom variants (power supply, output interface, connector, cable length) are available; contact us to discuss your requirements.
Technical Documents
- User Manual
- SensorOneSet Configuration Utility (RS485)
- SensorOneSetSDI12 Configuration Utility (SDI-12)