External LoRaWAN modem for Elster gas meters GM-2

LoRaWAN® modem GM-2 is designed to take readings from Elster gas meters, with the subsequent accumulation and transfer of this information to the LoRaWAN® network.
The modem is equipped with Hall sensors, one of which calculates the current meter readings and the other is located in such a way and has a sensitivity level that reacts only to the presence of an external magnetic field (for example, when a strong magnet is placed near the gas meter to disable the counting mechanism).
To protect against unauthorized access, the modem has a tamper. There are also two security inputs and two open-drain outputs for control of an external devices.
The modem is powered by a 3600 mAh SAFT battery. The modem acts as a LoRaWAN® device of class A.

Open-drain outputs: 2

Security inputs: 2

USB-port: mini-USB, type B

Operating temperatures, °С: -40…+85

Built-in temperature sensor: yes

LoRaWAN® class: A

Number of LoRaWAN® channels: 16

Frequency band: RU868, EU868, KZ865, custom (EU868 based)

Activation type: ABP or OTAA

Communication period: 1, 6, 12 or 24 hours

LoRa antenna type: internal

Sensitivity: -138 dBm

Radio coverage within line of sight: up to 15 km

Radio coverage in restrained urban condi: up to 5 km

Transmitter power by default: 25 mW (configurable)

Maximum transmitter power: 100 mW (configurable)

Battery type: 3600 mAh (SAFT)

Housing dimensions without mounting, mm: 88 х 52 х 37

Ingress protection rating: IP53

Tamper: Yes

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