Relative humidity data-logger ValProbe® RM

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Overview
Kaye ValProbe® RM is a wireless dual‑sensor data logger system engineered for continuous environmental and facility monitoring in pharmaceutical, biotech and regulated environments. The compact logger supports two digital sensor modules and a ValProbe RM‑B option is available without a local display for cost‑sensitive installations.

RF specifications & network
The platform operates in the 2.4 GHz ISM band using a proprietary dual‑antenna architecture to form a scalable star network. Each base station supports up to 50 wireless loggers (up to 100 sensors) and provides approximately 300 m (900 ft) line‑of‑sight coverage. Multiple base stations can be networked via Ethernet and integrated with LabWatch IoT using industry standard protocols. Loggers include local buffering to prevent data loss during connectivity interruptions.

Data redundancy & availability
Onboard logger memory stores up to 100,000 samples per sensor (~10 weeks at 1‑minute sampling). The system automatically switches to battery power during mains loss. Gateways provide up to 30 days of local storage and synchronize data to cloud storage when connectivity is restored.

Data security & compliance
All transmitted and at‑rest data use industry standard encryption (AES‑128). The platform includes tamper‑evident mechanisms, secure key management, advanced authentication, configurable user access controls and time‑stamped audit trails to support GxP data integrity and regulatory requirements.

Modular digital sensors
ValProbe RM loggers accept two digital sensor modules (temperature RTD PT100, RH, voltage, current 4–20 mA, dry contacts). Each module stores calibration data to allow hot‑swap replacement without disrupting measurement history; the system auto‑detects sensor changes and prompts eSignature verification. Sensors can be returned to ISO/IEC 17025‑accredited service centres for recalibration.

Key features

• Dual‑sensor wireless data logger design with compact base unit
• 2.4 GHz RF platform with proprietary dual‑antenna for enhanced link stability
• Star topology supporting up to 50 loggers / 100 sensors per base station
• RF range ~300 m LOS (environment dependent)
• Local logger buffering and gateway storage with automatic cloud sync
• Up to 100,000 samples per sensor; typical 1‑minute sampling, ~30 s transmission
• AES‑128 encryption, secure authentication and audit trails for GxP support
• Support for temperature, RH, voltage, current and contact inputs
• USB export, RJ45 Ethernet, bath and IRTD ports
• Battery backup for base station (~30 min) and logger (~1 year at 1‑min sampling)
• IP54 logger ingress protection; ABS enclosure (UL 94‑HB)

Applications

• Warehouses and cold storage
• Clean rooms and controlled environments
• Pharmacies and compounding areas
• Research and QC laboratories
• Blood banks and clinical storage
• Environmental chambers

Selected specifications
Measurement inputs: Temperature, RH, voltage, current, contact
RF frequency: 2.4 GHz ISM (IEEE 802.15.4 compliant)
Network topology: Star
Data rate & encryption: 250 kbps, AES‑128
Capacity: Up to 50 loggers / 100 sensors per base station
Logger storage: Up to 100,000 samples per sensor
Sampling rate: 1 minute; transmission interval ≈30 seconds
Base station power: Adapter 100–240 VAC → 12 VDC 4 A; 2 × 3.7V AA Li‑ion backup (~30 min)
Logger power: 2 × 3.6V A‑size lithium primary (field replaceable); ~1 year battery life (1‑min sample)
Environmental ranges: Logger −25–50°C operating; base station 0–50°C operating
Compliance: CE, FCC, listed by Eurofins MET Labs (USA)