DataNet DNL920/DNL910/DNR900 Wireless Environmental Monitoring Network System
| Origin | Imported |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Model | DataNet DNL920 (RH/Temp Integrated), DNL910 (Temp-Only), DNR900 (Receiver/Repeater) |
| Input Channels | 4 configurable analog/digital inputs per logger |
| Sensor Support | PT-100 (2-wire), Thermocouples J/K/T, 0–24 mA, 0–50 mV, 0–1 V, NTC, Pulse/Frequency (Input 1 only) |
| Internal Sensors | DNL920 — RH 5–95% ±3% (10–90%), Temp −20–50°C ±0.53°C |
| RF Protocol | ZigBee IEEE 802.15.4 @ 2.4 GHz ISM band |
| Max Network Nodes | 65,000 (including loggers, repeaters, receivers) |
| Sampling Resolution | 16-bit |
| Storage Capacity | 59,000 samples per unit |
| Sampling Rate | 1/s to 1/2 h (1/2 s min for multi-sensor configurations) |
| RF Range | Up to 80 m (standard), 800 m (power-amplified, line-of-sight) |
| Data Security | 128-bit AES encryption |
| Compliance | CE, FCC, RoHS |
| Power | Rechargeable 4.8 V NiMH (800 mAh), 12 V DC input |
| Operating Environment | −20 to +50 °C |
| Enclosure | ABS plastic, 97 × 93 × 27 mm, 200 g |
Overview
DataNet is a robust, scalable wireless environmental monitoring network engineered for continuous, high-integrity data acquisition across distributed industrial, laboratory, pharmaceutical, and cold-chain environments. Built on the IEEE 802.15.4 ZigBee protocol, the system operates in the globally unlicensed 2.4 GHz ISM band—ensuring regulatory compliance without spectrum licensing overhead. Each node functions as both sensor endpoint and self-healing mesh relay, enabling autonomous route discovery and redundancy-driven packet delivery. This topology eliminates single points of failure and supports up to 65,000 interconnected devices—including DNL910 (temperature-only loggers), DNL920 (integrated temperature/humidity loggers), and DNR900 receiver/repeaters—without requiring infrastructure-level gateways or cellular backhaul. The 16-bit analog-to-digital conversion architecture ensures metrological consistency across all input types, while internal signal isolation (80 dB channel-to-channel) suppresses cross-talk in electrically noisy settings. All units are CE- and FCC-certified and designed for operation under GLP/GMP-aligned workflows, supporting audit-ready timestamped logging and traceable calibration records.
Key Features
- Fully meshed ZigBee 2.4 GHz wireless architecture with automatic node discovery and dynamic path optimization
- 16-bit resolution ADC with programmable input configuration per channel: 0–24 mA, 0–50 mV, 0–1 V, PT-100 (2-wire), thermocouples J/K/T, NTC, pulse counting, and frequency measurement (Input 1 only)
- Integrated environmental sensing: DNL920 includes factory-calibrated capacitive RH sensor (5–95% RH, ±3% accuracy over 10–90% range) and precision thermistor (−20 to +50 °C, ±0.53 °C); DNL910 provides equivalent temperature measurement (±0.3 °C)
- On-device LCD display (2×16 characters) and full keypad for local configuration, real-time value inspection, and alarm acknowledgment without PC dependency
- Local data buffering (59,000 samples) with failover storage—loggers retain measurements during RF outages and synchronize upon reconnection
- 128-bit AES encryption and secure over-the-air (OTA) firmware updates ensure data integrity and long-term maintainability
- Configurable alarm outputs: open-collector digital output (50 mA / 3 V DC max) with auto-reset protection, plus software-triggered email/SMS notifications with user-defined thresholds, delay timers, and persistence windows
Sample Compatibility & Compliance
DataNet accommodates a broad spectrum of industrial and scientific sensors, including standardized PT-100 probes (−70 to +400 °C, available with 2.5/4/6 m Teflon-insulated cables rated to 200 °C), J/K/T thermocouples, and 4–20 mA loop-powered transmitters. Its input architecture meets IEC 61000-4 immunity standards for electrostatic discharge (ESD), radiated RF fields, and fast transient bursts—critical for deployment in manufacturing floors and utility substations. The system supports FDA 21 CFR Part 11-compliant workflows through DataNet PC Suite’s electronic signature capability, audit trail generation, and role-based access control. All recorded data carries immutable timestamps synchronized via internal RTC (±2 ppm stability). Calibration certificates are exportable in PDF format with traceability to NIST-traceable references. CE and FCC declarations confirm conformity with EMC Directive 2014/30/EU and Radio Equipment Directive 2014/53/EU.
Software & Data Management
DataNet PC Suite (Windows-based) serves as the central configuration, visualization, and archival engine. It enables full remote commissioning of individual loggers by unique ID, eliminating physical address dip-switching. Real-time telemetry appears in tabular, time-series graph, or Excel-style grid views—with customizable scaling, unit conversion (°C/°F), and multi-channel overlay. The map view renders physical node placement, RF link quality metrics, and hop-count routing paths—facilitating site-specific network optimization. Alarm rules support multi-condition logic (e.g., “trigger if RH > 75% AND temp 10 min”). Analytical modules include dew point calculation, F₀ sterilization integral computation, statistical summaries (mean, min/max, std dev), and histogram generation. All reports export natively to CSV and XLSX formats; scheduled weekly PDF summaries can be auto-archived or emailed. Firmware and calibration parameters are stored in encrypted project files, ensuring version-controlled reproducibility across deployments.
Applications
- Pharmaceutical warehouse and cold-chain validation per EU GDP Annex 9 and WHO TRS 961
- Environmental chamber monitoring for ISO/IEC 17025-accredited testing laboratories
- Food processing facility HACCP critical control point (CCP) logging
- Server room and data center thermal mapping with hotspot detection
- University research labs requiring distributed, low-power, long-duration environmental logging
- Museum and archive climate preservation systems compliant with PAS 198:2012
FAQ
What is the maximum number of loggers supported in a single DataNet network?
A fully meshed DataNet network supports up to 65,000 total nodes—including loggers, repeaters, and receivers—leveraging ZigBee’s large-scale addressing capability.
Does DataNet support 21 CFR Part 11 compliance for regulated industries?
Yes—DataNet PC Suite provides electronic signatures, immutable audit trails, user access controls, and calibration record management required for FDA-regulated environments.
Can external sensors be calibrated independently of the logger hardware?
Yes—each analog input channel supports user-defined linear or polynomial calibration curves, and sensor-specific offset/gain corrections can be applied during post-processing or embedded in firmware.
How does the system handle communication loss between logger and receiver?
Loggers store data locally (59,000 samples) and automatically resume synchronization when RF connectivity is restored; adjacent loggers may act as temporary backup relays per mesh topology.
Is battery life affected by sampling frequency or RF transmission load?
Yes—typical battery life ranges from 6 months (1 sample/hour, minimal RF hops) to 3 weeks (1 sample/second, full mesh relay duty); external 12 V DC power extends operation indefinitely.
