testo 175 T1 Temperature Data Logger with Integrated NTC Sensor

Overview

The testo 175 T1 is a single-channel, wall-mountable temperature data logger engineered for continuous, unattended monitoring in cold chain environments—particularly refrigerated and frozen storage facilities, transport vehicles, and food processing areas. It integrates a high-stability NTC (Negative Temperature Coefficient) thermistor sensor directly into its robust housing, eliminating external probe cabling and associated calibration drift or mechanical vulnerability. The device operates on the principle of resistance-based temperature measurement, where changes in sensor resistance are linearized and converted into traceable digital temperature values compliant with international metrological standards. Designed explicitly for regulatory adherence in food safety management systems, the testo 175 T1 meets DIN EN 12830 for temperature recording equipment used in refrigerated transport and storage, and supports HACCP critical control point validation through configurable alarm thresholds, real-time limit violation indication, and auditable data integrity.

Key Features

• Integrated NTC sensor with factory-calibrated traceability, eliminating probe interface errors and thermal lag from external cables
• IP65-rated enclosure—dust-tight and protected against low-pressure water jets—enabling operation during routine facility cleaning without removal from mounting location
• High-capacity internal memory storing up to 1,000,000 timestamped measurements, supporting long-term deployment without frequent data retrieval
• Auto-save functionality ensures full data retention during battery replacement or power interruption, preserving continuity of record integrity
• Backlit LCD display showing real-time temperature, user-defined upper/lower limits, min/max values, elapsed logging time, and remaining battery capacity—no PC required for field verification
• Configurable logging interval from 10 seconds to 24 hours, optimized for dynamic environments (e.g., door openings in walk-in freezers) or stable ambient monitoring
• Three-year battery life under typical 15-minute sampling at +25 °C, using standard AAA alkaline cells—field-replaceable without tools or service intervention

Sample Compatibility & Compliance

The testo 175 T1 is validated for use across food manufacturing, distribution, retail cold storage, and pharmaceutical logistics where ambient air temperature—not surface or product core temperature—is the regulated parameter. Its measurement range (−35 °C to +55 °C) covers deep-freeze, chilled, and ambient warehouse conditions. Compliance is documented per DIN EN 12830:2018, which specifies performance requirements for temperature recorders used in refrigerated transport and storage—including accuracy, stability, recovery time after thermal shock, and data retention integrity. The device also aligns with HACCP Principle 5 (verification) by enabling objective, time-stamped evidence of temperature control at critical points. While not intrinsically certified for pharmaceutical GxP environments, its hardware architecture supports CFR 21 Part 11-compliant workflows when paired with the optional ComSoft CFR software (audit trail, electronic signatures, role-based access).

Software & Data Management

Data retrieval and configuration are supported via three tiered software platforms: ComSoft Basic (freely downloadable) enables instrument setup, basic data export to CSV/Excel, and graphical trend review; ComSoft Professional adds multi-device fleet management, automated report generation, statistical process analysis (e.g., Cp/Cpk), and scheduled email alerts; ComSoft CFR implements full 21 CFR Part 11 compliance—including electronic signature enforcement, immutable audit trails, and user permission hierarchies—for regulated life science applications. All versions support direct USB connection (mini-USB cable sold separately) or SD card transfer—ensuring flexibility in environments with restricted network access or IT security policies prohibiting direct PC instrument connections.

Applications

• Continuous temperature surveillance in refrigerated warehouses and blast freezers per EN 12830 validation protocols
• Monitoring temperature excursions during road or rail transport of perishable goods (e.g., dairy, meat, produce)
• Verification of cold room performance during commissioning, seasonal recalibration, or preventive maintenance cycles
• Supporting ISO 22000 and BRCGS Food Safety audits with tamper-evident, time-stamped records
• Baseline environmental monitoring in cleanrooms or controlled storage areas where ambient stability impacts shelf life
• Backup logging for HVAC systems lacking native data export capability

FAQ

Is the testo 175 T1 suitable for measuring product core temperature?
No—the device measures ambient air temperature only via its integrated NTC sensor. For product core or surface temperature, external probes (e.g., testo 175-T2/T3 models) must be used.
Does the device require annual recalibration?
While not mandated by EN 12830, testo recommends periodic verification against a traceable reference source (e.g., dry-well calibrator) at least once per year or after physical impact—documentation included in supplied calibration certificate.
Can data be exported directly to LIMS or ERP systems?
Yes—ComSoft Professional supports ODBC connectivity and configurable CSV/XML templates compatible with common laboratory and enterprise systems.
What happens if the SD card becomes full before manual retrieval?
The device automatically overwrites the oldest data when memory is exhausted—unless “Stop logging when full” mode is selected during programming.
Is the wall mount bracket compatible with all standard mounting surfaces?
The included stainless-steel bracket features adjustable screw spacing and rubberized contact pads, designed for secure attachment to painted metal, concrete, or tiled walls without compromising IP65 sealing.