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| Brand | HKM |
|---|---|
| Origin | Guangdong, China |
| Model | HGS-W21 (Wireless Indoor Temp/RH Logger), HGS-R5 (433 MHz Wireless Data Concentrator) |
| Communication | 433 MHz ISM-band RF (licensed by China NRR) |
| Storage | Onboard non-volatile memory (≥32,000 records per unit) |
| Alarm | Configurable high/low thresholds with local buzzer |
| Compliance | Designed to support GSP (China Good Supply Practice), GLP (Good Laboratory Practice), and archival environmental control per DA-001–2021 (National Archives Administration of China) |
| Connectivity | Up to 250 wireless sensors per concentrator (HGS-R5) |
| Software | Windows-compatible (Win7–11), real-time graphing, statistical reporting (min/max/avg), audit trail export (CSV/PDF), alarm log with timestamp and event annotation |
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