In industrial IoT scenarios, equipment often needs to operate reliably outdoors under harsh conditions. Ebyte's latest E91-DTU(xxxSL30) series LoRa wireless data radios are designed precisely for this purpose.
This series includes the E91-DTU(400SL30) (410–493 MHz) and E91-DTU(900SL30) (850–930 MHz) frequency variants, with a transmit power of up to 30 dBm (1000 mW). In open areas, the tested communication distance reaches 8 km. Utilizing SEMTECH's latest generation LoRa spread-spectrum modulation technology, the receiver sensitivity is as low as -132 dBm, offering excellent anti-interference capability.
What impresses most is its industrial-grade protection design. The housing is made of PC flame-retardant material, internally potted with resin and sealed with a silicone O-ring, achieving an IP67 waterproof rating—capable of full immersion. The supply voltage ranges from 8–28 V DC, supporting both power adapters and direct wiring. The operating temperature range is -40°C to +85°C, adapting to extreme cold and high heat.
For interfaces, it features a 5-pin M12 waterproof aviation connector with RS485 communication and Modbus protocol support. Multiple protection features include reverse polarity protection, overcurrent protection, and antenna surge protection, significantly enhancing device reliability.
Functionally, it supports transparent transmission, fixed-point transmission, broadcast, WOR low-power wake-up, LBT carrier sensing, and relay networking. The air data rate is adjustable from 2.4 to 62.5 kbps, and packet length is configurable from 32 to 240 bytes. It supports serial port firmware upgrades and remote wireless parameter configuration for easy maintenance.
Overall, the E91-DTU(xxxSL30) is a truly industrial-grade LoRa radio, ideal for scenarios requiring waterproofing and long-distance communication, such as outdoor water monitoring, photovoltaic plants, and smart agriculture.
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