Datalogger Sofrel DL OPEN SENSOR Low Power

The SOFREL OpenSensor Low Power is an "open" IoT data logger for remote flowmeter reading, district metering and water quality monitoring, manufactured by LACROIX under the SOFREL brand, which specializes in remote management and monitoring solutions for water networks. It belongs to the SOFREL DL4W 4G LPWAN data logger range, in its DL4W-LP model, and is designed to bring the Modbus instrumentation found in drinking water and sewer networks into telemetry.

Through its RS-485 Modbus RTU link, the OpenSensor LP periodically acquires up to 14 registers spread across 8 devices, such as flowmeters and quality sensors, at transmission speeds from 1,200 to 19,200 baud. It powers connected devices at 5 V or 12 V with up to 0.8 W cumulative power, or disables power (0 V) for self-powered devices, and detects sensor link faults. It also provides 2 digital inputs for meters, status signals, overflow sensors and rain gauges, and 1 analog input for a SOFREL pressure sensor or third-party sensors on a 4-20 mA loop.

It includes district metering calculations (average flows, night flow, daily volumes, and daily minimum and maximum flows) and self-monitoring calculations (flow from measured height, daily volume and daily number of overflows), with dynamic archiving of up to 100,000 data points. Its enclosure features enhanced IP68 waterproofing, verified by an independent laboratory through 30-day immersion tests under 4 m (13.1 ft) of water, and it runs on an internal high-capacity lithium battery.

Data is transmitted over 2G/4G M2M cellular networks (LTE-M and NB-IoT) to the utility's SCADA system, with daily synchronization, and it can be fitted with a 4 or 8 m (13.1 or 26.2 ft) external FLEX antenna. It communicates in inter-station mode with SOFREL S500, S4W, AS and YDRIX RTUs, simplifies data use through the SOFREL WEB LS IoT platform and is compatible with SOFREL conductivity, turbidity and pH/redox/temperature sensors, as well as the SOFREL LTC groundwater probe. Sensors and Modbus registers are configured via Bluetooth using the SOFTOOLS software.