AS ONE AD5680 Dual-Channel Thermo-Hygrometer with External Temperature Probe

Overview

The AS ONE AD5680 is a dual-channel thermo-hygrometer engineered for reliable, real-time environmental monitoring in laboratory, quality control, storage, and calibration environments. Unlike single-sensor units, the AD5680 integrates an internal sensor for ambient chamber or workspace conditions and a detachable external thermistor probe (included with model 2-7397-01), enabling concurrent measurement of two physically separated locations—such as inside a stability chamber and its external control panel, or across different zones of a cleanroom or warehouse. Its measurement principle relies on precision NTC thermistors for temperature and capacitive polymer sensing elements for relative humidity, both calibrated to traceable reference standards. The device operates without external power sources, drawing from two standard AA batteries, and maintains stable readings across its full specified range with typical accuracy conforming to industrial-grade tolerances common in ISO/IEC 17025-aligned facilities.

Key Features

• Dual-channel capability: Simultaneous internal ambient and external remote temperature/humidity monitoring
• Max/Min memory retention: Automatically records and retains extreme values for both temperature and RH over time—critical for compliance documentation and trend analysis
• Integrated real-time clock: Enables timestamped data capture for audit-ready logging (no PC required)
• Flexible deployment: Designed for wall mounting via integrated bracket or stable desktop placement—optimized for space-constrained labs and production floors
• 3-meter shielded external probe cable: Minimizes electromagnetic interference and thermal conduction error; connector rated for repeated insertion cycles per IEC 60529 IP20 specifications
• Low-power architecture: Battery life exceeds 12 months under typical usage (display active 24/7), supporting unattended long-term monitoring

Sample Compatibility & Compliance

The AD5680 is not sample-contact equipment; it performs non-invasive environmental parameter acquisition only. It is suitable for use in controlled environments where monitoring of storage conditions (e.g., pharmaceutical stability chambers, electronic component warehouses, archival repositories) is mandated by regulatory frameworks including WHO Technical Report Series No. 992 (Annex 9), EU GMP Annex 15, and USP . While the instrument itself does not carry CE, UKCA, or FDA 510(k) certification, its design adheres to general EMC immunity requirements per IEC 61326-1 for laboratory equipment. Calibration certificates traceable to JCSS (Japan Calibration Service System) are available upon request—supporting GLP and internal QA validation protocols.

Software & Data Management

The AD5680 operates as a standalone monitoring device with no proprietary software dependency. All recorded max/min values and current readings are accessible directly on the LCD display. For integration into broader environmental monitoring systems (EMS), users may manually transcribe timestamped values into LIMS or Excel-based tracking logs. Though the unit lacks USB or Bluetooth output, its consistent display format (°C/%RH/time) supports automated optical character recognition (OCR) workflows when deployed in fixed-position applications. Audit trails generated via manual entry comply with ALCOA+ principles when paired with controlled logbook procedures and reviewer sign-offs.

Applications

• Stability testing environment verification per ICH Q1 guidelines
• Pre-shipment environmental validation for temperature-sensitive diagnostics or biologics
• Baseline mapping of HVAC performance in Grade C/D cleanrooms
• Monitoring of calibration laboratories where ISO/IEC 17025 requires documented ambient condition records
• Field deployment in metrology labs verifying thermal soak conditions prior to instrument warm-up
• Archival storage compliance (e.g., ISO 11799 for document preservation environments)

FAQ

Does the AD5680 support data export or PC connectivity?
No—the AD5680 is a self-contained display and memory unit with no digital interface. Data must be manually recorded.
Is the external probe interchangeable with other AS ONE models?
Yes, the 3 m probe (part number 2-7397-01) is mechanically and electrically compatible with AD5681 and AD5682 series units.
What is the recommended recalibration interval?
AS ONE recommends annual verification against NIST-traceable references in accordance with internal QA policy or ISO/IEC 17025 Clause 6.6.
Can the device operate in condensing humidity environments?
The internal sensor is rated for 20–100 %RH non-condensing conditions; prolonged exposure to condensation may impair long-term drift performance.
Is battery replacement user-serviceable?
Yes—battery compartment is accessible via two Phillips screws; no tools beyond a #0 screwdriver are required.