testo 176 H1 Four-Channel Temperature and Humidity Data Logger
| Brand | testo |
|---|---|
| Origin | Germany |
| Model | 0572 1765 |
| Channels | 4 (supports up to 2 external NTC temperature probes or 2 capacitive humidity probes) |
| Temperature Range | -20 °C to +70 °C |
| Temp. Accuracy | ±0.2 °C (-20 to +70 °C), ±0.4 °C (outside range) + ±1 digit |
| Humidity Range | 0–100 %RH |
| Humidity Accuracy | probe-dependent |
| Resolution | 0.1 °C / 0.1 %RH |
| Memory Capacity | 2,000,000 readings |
| Battery Life | up to 8 years (15-min interval, +25 °C) |
| Power Source | replaceable TL-5903 lithium battery |
| IP Rating | IP65 |
| Dimensions | 103 × 63 × 33 mm |
| Weight | 220 g |
| Operating Temperature | -20 °C to +70 °C |
| Storage Temperature | -40 °C to +85 °C |
| Measurement Interval | 1 s to 24 h |
| Data Interface | Mini-USB port & SD card slot |
| Compliance | EU Directive 2014/30/EU (EMC), 2011/65/EU (RoHS) |
Overview
The testo 176 H1 is a high-integrity, four-channel temperature and humidity data logger engineered for long-term environmental monitoring in regulated and non-regulated industrial, commercial, and infrastructure applications. It operates on the principle of precision digital signal acquisition from calibrated NTC thermistors and capacitive relative humidity sensors—enabling simultaneous, time-synchronized measurement across up to four independent channels via two externally connected probes (each supporting dual-parameter output when using combined temp/RH probes). Designed and manufactured in Germany, the device meets stringent requirements for measurement stability, data traceability, and operational resilience under variable ambient conditions. Its robust IP65-rated housing ensures protection against dust ingress and low-pressure water jets, making it suitable for wall-mounted deployment in warehouses, HVAC ducts, pharmaceutical storage rooms, museum climate zones, and building envelope diagnostics. With an onboard memory capacity of 2 million readings and an 8-year battery life at standard logging intervals, the testo 176 H1 delivers autonomous, maintenance-free operation without compromising data continuity—even during battery replacement, thanks to automatic data backup functionality.
Key Features
- Four-channel capability: Accepts up to two external probes—each capable of measuring temperature and relative humidity simultaneously (e.g., testo 0636 9742 or 0636 9743), enabling full spatial profiling of thermal-hygrometric conditions.
- High-resolution display: Backlit monochrome LCD shows real-time values for current temperature, relative humidity, dew point, min/max extremes, user-defined alarm thresholds, and remaining battery life—without requiring PC connectivity.
- Extended data integrity architecture: Automatic data retention during battery replacement; timestamped measurements with internal real-time clock (RTC) synchronized to millisecond precision.
- Configurable logging intervals: Adjustable from 1 second to 24 hours, supporting both rapid transient capture and ultra-long-term trend analysis.
- Secure physical mounting: Includes wall-mount bracket with tamper-evident locking mechanism compliant with ISO/IEC 27001-aligned access control practices.
- Replaceable TL-5903 lithium battery: Field-serviceable by end users; no soldering or specialized tools required.
Sample Compatibility & Compliance
The testo 176 H1 supports a broad portfolio of certified external probes—including Class A NTC sensors (e.g., testo 0608 2191) and capacitive RH sensors traceable to NIST standards. Probe interchangeability enables application-specific configuration: e.g., surface temperature mapping with RTD-compatible adapters, condensation risk assessment using dew point calculation, or mold-prone zone identification in hygroscopic building materials. The instrument complies with EU Electromagnetic Compatibility Directive 2014/30/EU and RoHS Directive 2011/65/EU. When paired with ComSoft CFR 21 Part 11 software, it satisfies FDA-mandated requirements for audit trails, electronic signatures, role-based access control, and data immutability—making it deployable in GxP environments including pharmaceutical cold chain validation, medical device storage, and clinical trial site environmental qualification.
Software & Data Management
Data configuration and retrieval are managed through testo’s ComSoft software suite, available in three validated editions: ComSoft Basic (freely downloadable, supports basic setup and CSV export); ComSoft Professional (licensed, adds statistical analysis, multi-device fleet management, and automated report generation per ISO 17025 guidelines); and ComSoft CFR 21 Part 11 (validated for life sciences, featuring ALCOA+ principles implementation—Attributable, Legible, Contemporaneous, Original, Accurate—with full electronic record lifecycle governance). Data transfer occurs via Mini-USB interface or removable SD card (both optional accessories), with Excel-compatible export formats (.csv, .xlsx) and native support for time-series visualization, limit deviation alerts, and compliance-ready PDF reports.
Applications
- Building physics diagnostics: Quantifying moisture migration paths, identifying thermal bridges, and correlating indoor RH excursions with structural dampness or inadequate ventilation.
- Pharmaceutical warehouse qualification: Continuous monitoring of ambient storage zones per ICH Q5C and EU GDP Annex 9 requirements.
- Museum and archive conservation: Ensuring stable microclimates for artifact preservation in accordance with PAS 198:2012.
- Food logistics auditing: Verifying temperature/humidity profiles during transport and short-term holding per EN 12830 and HACCP protocols.
- Industrial process environment verification: Monitoring cleanroom buffer zones, paint curing ovens, or drying tunnels where hygrothermal consistency impacts product quality.
FAQ
Does the testo 176 H1 require factory calibration before first use?
No—the device ships with a manufacturer-issued calibration certificate traceable to national standards; field recalibration is not supported, but periodic verification using reference probes (e.g., testo 175-H1 reference kit) is recommended per ISO/IEC 17025.
Can the internal memory be expanded beyond 2 million readings?
No—memory is fixed at 2,000,000 entries; however, scheduled offloading via USB or SD card ensures continuous operation without data loss.
Is the device suitable for outdoor use?
It is rated IP65 and operates from −20 °C to +70 °C, but prolonged direct UV exposure or immersion is not permitted; use with weatherproof enclosures is advised for permanent exterior mounting.
What happens if the measurement interval is set below 1 second?
The minimum configurable interval is 1 second; sub-second sampling is not supported due to sensor response time limitations and internal ADC settling constraints.
Are firmware updates available, and how are they applied?
Yes—testo releases verified firmware updates annually via the ComSoft platform; updates are installed via Mini-USB connection and preserve all stored measurement data and configuration settings.
