- Dual-mode NB-IoT / LTE Cat-M1 cellular connectivity.
- Supports standard IoT protocols: MQTT(S), HTTP(S), FTP(S).
- Multi-sensor support: SDI-12, analog, and pulse inputs.
- Ultra-low power operation for long battery life.
- Solar-powered operation with rechargeable battery.
- Embedded flash memory for local data storage.
- Real-time clock retention and synchronization via NTP.
- USB configuration interface for easy setup.
- Rugged IP67 aluminum housing for outdoor use.
TBSL1/RFB-NbIOT-CatM1
Multi-sensors Nb-IOT Cat M1 dual mode RTU
TBSL1/RFB-NbIOT-CatM1 is a compact and rugged multi-sensor Remote Telemetry Unit (RTU) supporting dual-mode cellular communication: NB-IoT and LTE Cat-M1. It is designed for long-term remote monitoring applications requiring low power consumption, wide network coverage, and support for multiple sensor interfaces. Powered by a rechargeable battery with external solar panel, this RTU is ideal for outdoor and off-grid installations such as environmental monitoring, utilities, and industrial telemetry.
Features
Key capabilities and advantages
Specification
Technical specifications and parameters
| Modem | Dual mode NB-IoT / LTE Cat-M1. |
| Cellular Frequencies | Cat-M1 (B1 / B2 / B3 / B4 / B5 / B8 / B12 / B13 / B18 / B19 / B20 / |
| Protocols | MQTT(S) / HTTP(S) / FTP(S). |
| Supported sensor types | Multi. |
| SDI-12 | v1.4. |
| Analog inputs | 2 × configurable inputs/Voltage: 0–2.5 V/Current: 4–20 mA. |
| Pulse input | 1 × 0–3 V input, max 1 Hz. |
| Sensor connectors | 2 × LLT-M14BMC07 (SDI-12 / analog / pulse signals multiplexed). |
| Power source | Rechargeable battery & external solar panel. |
| Solar panel MPP voltage | 5 V, 2–5 W. |
| Idle current | 400 µA. |
| Battery type | 1 × 3.7 V Li-Ion or Li-Po battery / With safety PCB and 10 kΩ NTC. |
| Battery | JST B3B-XH-A (LF)(SN). |
| Solar panel | 1 × LLT-M14BMC05. |
| Configuration interface | USB. |
| Configuration port | USB-B. |
| Measurement storage | 128 Mbits embedded flash. |
| Real-time retained | Yes. |
| Real-time synchronization | Connection to NTP server. |
| Protection | Waterproof. |
| Material | IP67 aluminum housing. |
| Housing details | SP-AG-FA3-1 family. Single-piece gasket. IP67 rating. TNC antenna connector. Gore-Tex vent. IP67 circular panel connector. |
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