Product name

Milesight UR41

When you need reliable, low power LTE (CAT4 or CAT1) 4G connectivity with small form factor, Serial connectivity and GPS, then the Milesight UR41 is the answer.

Mini 4G routers for solar, battery and embedded deployments

The Milesight UR41 and UR41L are mini 4G industrial routers for space-limited and low-power sites. Both offer isolated DI/DO, switchable RS232/RS485, and standby modes for solar or battery installs. The UR41 adds Cat 4 speed and GPS; the UR41L runs Cat 1 for telemetry. Remote management is via the Milesight Development Platform.

Small enough to fit, tough enough to trust

Cat 4 or Cat 1, GPS or no GPS. Both the UR41 and UR41L share the same rugged hardware, the same industrial interfaces, and the same low-power design.

Low power consumption

Draws just 6.3 mA at 12 V in standby and 78 mA idle. Wake the router on a schedule, an SMS or a digital input. Power it from 5 to 24 V DC or over USB-C. Low enough for solar and battery-powered sites.

Talks to legacy serial kit

One serial port switches between RS232 and RS485 in software, with a 120 Ω terminator switch built in. Modbus RTU, Modbus TCP, Modbus gateway and DLMS client are all on board. Connect meters, PLCs and RTUs with no extra converter.

Reads sensors, drives outputs

One isolated digital input and one digital output handle field signals directly. Trigger the output from the input, an SMS, Modbus or MQTT. Report input state the same way. No separate I/O module needed.

Know where assets are

The UR41 adds multi-constellation GNSS: GPS, GLONASS, BeiDou, Galileo and QZSS, at 2.5 m open-air accuracy. Forward position over serial, TCP, UDP or MQTT. Fit it to mobile plant and vehicles. The UR41L covers fixed-site telemetry without GPS.

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Expand key features

Milesight UR41 and UR41L

The Milesight UR41 and UR41L are mini industrial cellular routers for remote sites where space and power are limited. Both use the same metal enclosure at 70 × 55 × 22 mm, with an isolated digital input and output, a software-switchable RS232/RS485 serial port, and standby draw down to 6.3 mA for solar and battery installs. The UR41 runs 4G LTE Cat 4 with 3G and 2G fallback and adds multi-constellation GNSS. The UR41L runs LTE Cat 1 for low-throughput telemetry. Manage both remotely through the Milesight Development Platform.

Both variants suit smart metering, vending, environmental monitoring and remote equipment control. The serial port and Modbus support connect meters, PLCs and RTUs without an external converter. Where inbound VPN or remote access is needed, a fixed IP SIM is recommended, because standard SIMs sit behind carrier-grade NAT.

Key features

Two variants, one platform: the UR41 runs LTE Cat 4 with 3G and 2G fallback, the UR41L runs LTE Cat 1 for telemetry.
GNSS positioning (UR41): GPS, GLONASS, BeiDou, Galileo and QZSS at 2.5 m open-air accuracy.
Switchable serial: one port toggles RS232 or RS485 in software, with a built-in 120 Ω terminator for RS485.
Isolated digital I/O: one galvanically isolated input and one output, triggerable by DI, SMS, Modbus or MQTT.
Industrial protocols: Modbus RTU, Modbus TCP, Modbus gateway and DLMS client for meters, PLCs and RTUs.
Low power draw: 6.3 mA standby and 78 mA idle at 12 V, with scheduled and event-based wake.
Flexible power: 5 to 24 V DC terminal block or 5 V USB-C, with surge and reverse polarity protection.
Full VPN suite: OpenVPN, IPsec, WireGuard, ZeroTier, GRE, L2TP, PPTP and DMVPN.
Remote management: Milesight Development Platform for setup, mass config and monitoring, plus SNMP and TR069.
Rugged compact build: IP30 metal housing, 70 × 55 × 22 mm, -40 to +60 °C, DIN, wall or desk mount.