testo 176 H2 Temperature & Humidity Data Logger (Model 0572 1766)

Overview

The testo 176 H2 Temperature & Humidity Data Logger (Model 0572 1766) is a high-integrity, long-term environmental monitoring instrument engineered for continuous, unattended recording of temperature and relative humidity in regulated and industrial settings. Based on precision NTC thermistors and capacitive humidity sensors, the device employs digital signal conditioning and non-volatile memory architecture to ensure metrological traceability and data integrity across extended deployment cycles. Its dual internal sensor channels—complemented by two external probe inputs—enable synchronized 4-channel monitoring, supporting spatially distributed or multi-zone environmental validation. Designed for compliance-critical applications—including cold chain verification, warehouse qualification, HVAC performance auditing, and cleanroom environmental mapping—the testo 176 H2 operates autonomously for up to eight years without maintenance when configured with standard logging intervals, eliminating the need for periodic recalibration or manual intervention during routine operation.

Key Features

• Robust metal housing with IP65 ingress protection—resistant to dust, water jets, and mechanical impact—enabling reliable operation in demanding industrial, pharmaceutical, and logistics environments.
• Non-volatile memory architecture ensures zero data loss during battery depletion or replacement; all measurements are securely written prior to power transition.
• 2 million measurement value capacity supports high-resolution logging over multi-year deployments—even at 1-second intervals—without data overflow or manual offloading.
• Dual external probe inputs accept industry-standard NTC and capacitive humidity probes, allowing flexible configuration for remote or inaccessible measurement points.
• Integrated wall-mount bracket with tamper-resistant locking mechanism facilitates secure, permanent installation in fixed infrastructure.
• Compliant with EU Electromagnetic Compatibility Directive 2014/30/EU and RoHS Directive 2011/65/EU, ensuring conformity with harmonized European safety and environmental standards.

Sample Compatibility & Compliance

The testo 176 H2 is compatible with a broad range of certified external probes—including testo’s own NTC and capacitive RH probes—enabling application-specific sensor selection based on required accuracy, response time, and environmental tolerance. It is explicitly validated for use in non-condensing atmospheres, as condensation may impair sensor stability and long-term calibration retention. In regulated environments, the device supports audit-ready workflows when paired with ComSoft CFR 21 Part 11 software, delivering electronic signature capability, user access control, audit trail generation, and data immutability—all aligned with FDA 21 CFR Part 11 requirements for electronic records and signatures. Its design also aligns with ISO 14644 (cleanrooms), ISO 17025 (testing laboratories), and GxP-aligned validation protocols for environmental monitoring systems.

Software & Data Management

Data programming, retrieval, and analysis are managed via the ComSoft software suite—available in three editions to match operational rigor and regulatory scope. ComSoft Basic (freely downloadable) enables rapid setup of logging parameters, real-time data visualization, and export to CSV or Excel formats. ComSoft Professional adds advanced features including statistical trend analysis, alarm threshold configuration, automated report generation, and multi-device fleet management. For life sciences and pharmaceutical users, ComSoft CFR 21 Part 11 provides full compliance support: role-based authentication, electronic signatures, immutable audit logs, and data integrity safeguards required under FDA and EMA guidelines. Data transfer occurs via mini-USB connection or removable SD card (both optional accessories), with all raw measurement files stored in encrypted binary format to prevent unauthorized modification.

Applications

• Continuous environmental qualification of pharmaceutical storage warehouses, cold rooms, and distribution centers per WHO TRS 961 and EU GDP Annex 9.
• Long-term HVAC system performance verification in office buildings, hospitals, and laboratory facilities—supporting ASHRAE Standard 110 and ISO 16798 energy efficiency assessments.
• Transport validation for temperature-sensitive shipments—including clinical trial materials, vaccines, and biologics—meeting IATA Perishable Cargo Regulations and GDP transport criteria.
• Baseline environmental monitoring during facility commissioning, requalification, and change control processes in GMP manufacturing environments.
• Historical climate profiling for archival compliance in museums, libraries, and archival storage facilities governed by ISO 11799.

FAQ

What is the maximum supported logging duration at 15-minute intervals?
Up to 8 years, assuming nominal operating conditions (+25 °C ambient) and use of the supplied TL-5903 lithium battery.
Can the device operate in condensing environments?
No—capacitive humidity sensors are not rated for sustained exposure to condensation; operation is limited to non-condensing atmospheres only.
Is calibration certificate included with delivery?
Yes—a factory calibration report traceable to national standards is supplied with each unit; optional accredited calibration (DIN EN ISO/IEC 17025) is available upon request.
Does the device support real-time data streaming?
No—it is a standalone logger; real-time telemetry requires external gateway integration via SD card or post-hoc USB download.
Are firmware updates available, and how are they applied?
Yes—firmware updates are distributed through the ComSoft software platform and installed via mini-USB connection.