Lihero LFSC-2007 Data Acquisition and Transmission Unit
| Brand | Lihero |
|---|---|
| Origin | Hunan, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | LFSC-2007 |
| Communication Interfaces | RS485 (1 channel), Ethernet (1 channel with built-in surge protection), GPRS, CDMA, ADSL, LAN, PSTN dial-up |
| Local Storage | 2 GB (supports ≥5 years of timestamped environmental monitoring data) |
| Backup Power | Integrated rechargeable battery, >8 hours runtime during AC power failure |
| Data Transmission | Multi-destination forwarding (one-to-many), CSV/Excel export via USB or network |
| Communication Switching | Manual or auto-failover switching between GPRS and Ethernet via HMI interface |
| Compliance | IEC 61000-4-5 (surge immunity), EN 61326-1 (EMC for industrial environments) |
Overview
The Lihero LFSC-2007 Data Acquisition and Transmission Unit is an industrial-grade edge telemetry device engineered for continuous, unattended operation in environmental monitoring infrastructure. It functions as a protocol-agnostic data concentrator, interfacing with heterogeneous field instruments—including water quality analyzers (e.g., pH, DO, COD, turbidity sensors), air pollutant monitors (PM₂.₅, SO₂, NOₓ, O₃), flow meters, and meteorological stations—via analog (4–20 mA, 0–5 V, 0–10 V) and digital (RS485 Modbus RTU/ASCII) inputs. Its core architecture implements deterministic real-time sampling, time-synchronized timestamping (NTP-supported), and local buffering to ensure data integrity during upstream communication outages. Designed for deployment in municipal water treatment plants, ambient air quality monitoring networks, and ecological observation stations, the LFSC-2007 complies with the operational requirements of national environmental information platforms (e.g., China’s MEP Online Monitoring System) while maintaining hardware-level interoperability with international SCADA and IoT middleware frameworks.
Key Features
- Robust dual-path communication architecture: Simultaneous GPRS (2G/3G fallback) and 10/100BASE-TX Ethernet connectivity, with configurable priority and automatic failover triggered by link loss detection.
- Industrial-grade local storage: 2 GB embedded flash memory with wear-leveling and journaling file system, enabling secure retention of ≥5 years of 1-minute interval sensor data (timestamped, checksum-verified).
- Field-resilient power management: Integrated sealed lead-acid or LiFePO₄ backup battery (user-replaceable), sustaining full functionality—including data logging, processing, and wireless transmission—for >8 hours under complete AC mains failure.
- Hardware-level surge protection: Built-in 6 kV/3 kA (line-to-ground) transient voltage suppression on both RS485 and Ethernet ports, certified to IEC 61000-4-5 Level 4.
- Flexible data routing: Support for one-to-many data forwarding to multiple server endpoints (e.g., provincial environmental cloud platform, local SCADA historian, third-party analytics API) with independent retry policies and TLS 1.2 encrypted sessions.
- Human-machine interface (HMI): 3.5-inch resistive touchscreen with intuitive menu navigation for configuration, real-time status monitoring, manual communication mode switching, and local data export via USB 2.0 host port.
Sample Compatibility & Compliance
The LFSC-2007 interfaces with a broad spectrum of environmental instrumentation conforming to common industrial protocols: Modbus RTU over RS485 (default), analog current/voltage inputs compliant with IEC 60364-4-41 and GB/T 13978–2008, and optional pulse input for flow meter integration. It meets electromagnetic compatibility requirements per EN 61326-1 (industrial environment) and surge immunity per IEC 61000-4-5 Ed.3. While not intrinsically safe, it is rated for IP30 enclosure protection and operates reliably within –20 °C to +60 °C ambient temperature and 5–95% non-condensing relative humidity. The device supports audit-ready data handling in accordance with GLP principles, including immutable timestamps, write-once storage logic, and user-access logs—all critical for regulatory reporting under China’s Environmental Monitoring Management Measures (Order No. 17 of MEP) and aligned with ISO/IEC 17025 data integrity expectations.
Software & Data Management
Configuration and diagnostics are performed via the embedded web server (HTTP/HTTPS) or the local HMI. Firmware updates are delivered securely over HTTPS with SHA-256 signature verification. Collected data is stored in a structured binary format with header metadata (device ID, sensor channel mapping, calibration coefficients), convertible to CSV or Excel via the built-in export utility. All transmitted payloads include CRC32 integrity checks and optional AES-128 encryption at rest and in transit. The unit maintains a full event log—including power cycles, communication failures, configuration changes, and alarm triggers—with UTC timestamps traceable to NTP-synchronized system clock. Remote management supports SNMP v2c/v3 for integration into enterprise network monitoring systems.
Applications
- Real-time wastewater discharge monitoring at industrial park effluent outlets, feeding data directly to provincial environmental supervision platforms.
- Distributed air quality monitoring networks across urban corridors, aggregating PM₂.₅, NO₂, and O₃ readings from low-cost sensor nodes before uplinking to central forecasting models.
- Remote reservoir and river cross-section monitoring, where solar-powered deployments rely on GPRS fallback during extended Ethernet outages.
- Calibration traceability support: Timestamped raw sensor outputs enable retrospective validation against reference instrument records during QA/QC audits.
- Edge preprocessing: On-device linearization, unit conversion, and basic threshold-based alert generation reduce bandwidth usage and accelerate incident response.
FAQ
Does the LFSC-2007 support Modbus TCP in addition to Modbus RTU?
No—it natively supports Modbus RTU over RS485. Modbus TCP bridging requires an external protocol converter or integration via its Ethernet port using custom application-layer framing.
Can historical data be accessed remotely without physical USB connection?
Yes—via the embedded HTTP(S) server: users may download compressed CSV archives or query specific date ranges through RESTful-style URI endpoints.
Is the internal battery replaceable by end users?
Yes—the battery compartment is accessible via four screws; replacement kits (12 V / 7 Ah SLA or LiFePO₄) are available under Lihero part number BAT-LFSC-2007-R.
What is the maximum number of sensor channels supported?
Up to 32 logical channels: 8 analog inputs (4–20 mA isolated), 1 RS485 bus (up to 24 Modbus slaves), plus 1 pulse input and 2 digital alarm inputs.
Does the device comply with FDA 21 CFR Part 11 for electronic records?
No—it is not validated for pharmaceutical or clinical use; however, its audit trail, timestamping, and data immutability features align with foundational ALCOA+ principles applicable to environmental GLP workflows.
