Renke RS-LMK-N01-1-EX Road Condition Sensor, 11-28V DC, RS485, 2-10m Range, 0-60° Angle, 25cm Diameter

The Renke RS-LMK-N01-1-EX sensor uses a standard RS485 serial interface, typically implementing the Modbus RTU protocol. This allows for direct, noise-immune integration with industrial Programmable Logic Controllers (PLCs), SCADA systems, and data acquisition units commonly used in traffic management and infrastructure monitoring networks.

The sensor incorporates an integrated heating element (rated at 13W) around its optical lens. This heating is typically controlled by an internal thermostat or via command through the RS485 interface. It activates automatically to prevent the accumulation of frost, ice, or condensation on the lens window, ensuring measurement accuracy is maintained in freezing rain, snow, or high-humidity conditions.

The sensor is calibrated to detect and measure ice and snow layer thickness from 0.00 mm up to 2.00 mm. It provides a quantitative output for this range via its RS485 data registers. For conditions where the layer exceeds 2mm, the sensor will typically indicate a saturated or 'presence detected' state rather than a precise millimeter value.

Yes, its non-contact optical design allows for installation on gantries, sign bridges, or poles overlooking active roadways. The specified 2-10 meter measurement distance and 0-60° detection angle provide flexibility in mounting height and lateral positioning to monitor specific lanes without requiring in-roadway installation or disrupting traffic flow.

The sensor requires a 11-28V DC power source. Connection is made via the sensor's cable or terminal block, which combines power (typically V+, GND) and the RS485 communication lines (A/B or D+/D-). Always refer to the official Renke wiring diagram for the specific pinout. The device draws 1.5W during normal sensing, with periodic peaks to 13W when the lens heater is active.