AS ONE MINI-TH-DP-15 Portable Temperature and Humidity Data Logger

Overview

The AS ONE MINI-TH-DP-15 is a compact, standalone temperature and humidity data logger engineered for long-term environmental monitoring in laboratories, pharmaceutical storage areas, cold chain logistics, cleanrooms, and archival facilities. It operates on the principle of capacitive relative humidity sensing combined with high-stability NTC thermistor-based temperature measurement—ensuring reliable performance across wide ambient conditions without external power or network dependency. Designed for unattended operation, the device autonomously records time-stamped measurements at user-defined intervals, storing up to 15,000 data points internally. Its sealed, impact-resistant housing meets IP54-rated ingress protection for dust resistance and limited water splashing, supporting deployment in non-sterile but variable industrial environments. The instrument does not require continuous PC connection during logging and maintains internal real-time clock (RTC) accuracy within ±2 min/month at 25 °C, enabling traceable temporal correlation of environmental excursions.

Key Features

• High-capacity internal memory: 15,000 timestamped readings (temperature + humidity), supporting extended deployments up to 6 months at 15-minute intervals
• Dual-line LCD display with alternating real-time temperature and humidity values; simultaneously shows battery status, remaining storage capacity, and system clock
• Configurable sampling interval from 2 seconds to 24 hours, with programmable delayed start (1–120 seconds) and flexible termination modes (full-memory stop or FIFO overwrite)
• Threshold-based alarm functionality: user-definable upper/lower limits for both temperature and humidity, triggering visual indicators (LCD flash) upon violation
• USB 2.0 interface enables rapid data download and configuration via included Windows-compatible software; no drivers required on modern OS versions (Windows 10/11, macOS 12+)
• Single AA alkaline battery provides typical operational life exceeding 12 months under standard logging conditions (10-minute interval, 25 °C ambient), minimizing maintenance cycles
• Robust ABS+PC enclosure with ergonomic mounting options—including magnetic backplate, adhesive pad, and optional wall bracket—for flexible placement in cabinets, transport containers, or on shelves

Sample Compatibility & Compliance

The MINI-TH-DP-15 is intended for ambient air monitoring only and is not suitable for direct immersion, pressurized gas streams, or corrosive atmospheres. It complies with IEC 60529 (IP54), EN 61000-6-3 (EMC emission standard), and RoHS Directive 2011/65/EU. While not certified to ISO/IEC 17025 or accredited for metrological traceability, its factory calibration is performed against NIST-traceable reference standards. For regulated applications—such as GDP-compliant cold chain validation or warehouse temperature mapping—the device may serve as a supplementary monitoring tool when used in conjunction with primary calibrated sensors and documented SOPs. It supports basic audit trail generation (start/stop timestamps, alarm events) but does not implement FDA 21 CFR Part 11 electronic signature or full ALCOA+ data integrity controls.

Software & Data Management

The bundled ZOGLAB DataView software (v3.x) provides intuitive graphical analysis: time-series plots with dual Y-axes, statistical summaries (min/max/mean/stdev), export to CSV/PDF, and customizable report templates. All logged data includes embedded UTC timestamps, sensor ID, and firmware version. The software logs configuration changes and export actions locally, though it lacks centralized server synchronization or multi-user role management. Raw binary files (.dat) are encrypted using lightweight AES-128 during transfer to prevent accidental corruption but do not support password protection or digital signing. Data integrity verification is performed via CRC-16 checksum upon import.

Applications

• Monitoring stability chambers and refrigerated storage units in pharmaceutical QC labs
• Validating temperature/humidity profiles during shipment of biologics, vaccines, or diagnostic reagents
• Documenting environmental conditions in museum artifact storage or library preservation rooms
• Supporting ISO 14644-1 cleanroom classification audits by supplementing particle counters with environmental context
• Field-deployed logging in agricultural research greenhouses or HVAC commissioning studies
• Baseline characterization of office or manufacturing space microclimates prior to HVAC optimization

FAQ

What is the recommended recalibration interval?
AS ONE recommends annual verification against a certified reference hygrometer and dry-well calibrator, particularly when used in GxP-regulated environments.
Can the device operate below 0 °C?
Yes—the specified operating range extends to −30 °C; however, condensation-induced drift may occur above 90 %RH at sub-zero temperatures due to inherent limitations of capacitive RH sensors.
Is the USB interface compatible with macOS and Linux?
Data export is supported on macOS 12+ and recent Linux distributions via generic mass-storage mode; configuration and real-time monitoring functions are Windows-exclusive.
Does the logger support external probe inputs?
No—this model features only integrated sensors; external thermocouple or humidity probe connectivity is not available.
How is battery life affected by sampling frequency?
At 2-second intervals, battery life reduces to approximately 2 weeks; at 24-hour intervals, it exceeds 2 years under ideal conditions (25 °C, no alarms triggered).