testo 191-P1-HACCP Pressure Data Logger

Overview

The testo 191-P1-HACCP is a certified, intrinsically robust pressure data logger engineered specifically for continuous, high-integrity monitoring of thermal process validation in food production—particularly pasteurization and steam sterilization cycles governed by HACCP (Hazard Analysis and Critical Control Points) protocols. It operates on absolute pressure measurement via a calibrated piezoresistive sensor, delivering traceable, time-synchronized readings across its full range of 1 mbar to 4 bar abs. Its design meets the stringent environmental and regulatory demands of high-temperature, high-humidity, and transient-pressure industrial processes—where measurement continuity, long-term stability, and post-cycle auditability are non-negotiable. Unlike general-purpose loggers, the 191-P1-HACCP integrates hardware-level sealing integrity, temperature-resilient materials (including PEEK-coated battery cap), and an IP68-rated stainless steel enclosure—ensuring reliable operation inside autoclaves, retorts, and steam tunnels without external housings or protective sleeves.

Key Features

• High-precision absolute pressure sensing with ±20 mbar accuracy and 1 mbar resolution—validated for critical control point (CCP) verification in thermal processing.
• Ultra-rapid t₉₀ response time of 0.2 seconds—enabling accurate capture of transient pressure events during steam injection, hold-phase transitions, and venting cycles.
• True 100% resealing capability after battery replacement: patented rotating-thread battery cap with PEEK polymer seal maintains IP68 integrity even after field servicing at elevated temperatures.
• Compact cylindrical form factor (Ø22 mm × 83 mm) optimized for insertion into narrow process ports, thermowells, and steam traps—minimizing flow disturbance and thermal lag.
• Extended operational lifetime: 2,500 hours of continuous logging at 10-second intervals under sustained +121 °C conditions—validated per IEC 60751 and EN 13485-compliant aging tests.
• Tool-free, intuitive battery exchange—no disassembly, no calibration drift, no recalibration required post-battery change.

Sample Compatibility & Compliance

The testo 191-P1-HACCP is validated for direct immersion or mounting in saturated steam environments up to 140 °C and pressures up to 4 bar abs—fully compatible with EN 285 (sterilization by steam), ISO 11134 (validation of moist heat sterilization), and FDA 21 CFR Part 11–compliant workflows when used with testo 191 Professional software. Its stainless steel (AISI 316L) body and PEEK-sealed electronics ensure resistance to condensate corrosion, microbial ingress, and repeated autoclave cycles. The device conforms to CE marking requirements under the EU Measuring Instruments Directive (MID) Annex MI-005 for pressure measuring instruments and carries full traceability to national standards (DKD/DAkkS-accredited calibration certificate included). It supports HACCP Principle 3 (establishing critical limits) and Principle 4 (establishing monitoring procedures) through deterministic, timestamped, and tamper-evident data capture.

Software & Data Management

Data configuration, retrieval, and analysis are performed using testo 191 Professional software—a validated Windows application supporting 21 CFR Part 11 compliance with electronic signatures, role-based access control, and full audit trail functionality (user actions, parameter changes, data exports). The software enables batch programming and parallel readout of up to eight 191-P1-HACCP units via the optional Multi-Station Docking Box—eliminating serial connection bottlenecks during routine validation runs. Raw measurement files (.tdf) are stored with embedded metadata (device ID, firmware version, calibration date, user-defined process tags), and export options include CSV, PDF reports with annotated trend graphs, and XML for LIMS integration. All data records retain native timestamps synchronized to UTC with microsecond precision—critical for cross-referencing with temperature loggers in dual-parameter thermal validation studies.

Applications

• Validation and routine monitoring of steam sterilization cycles in food canning, dairy UHT lines, and ready-to-eat meal production.
• HACCP-mandated pressure profiling during pasteurization of juices, sauces, and liquid dairy products in plate heat exchangers and holding tubes.
• Verification of vacuum integrity in retort vessels prior to steam admission and during cooling phases.
• Monitoring of jacket pressure in jacketed kettles and cookers to ensure consistent heat transfer rates.
• Supporting ISO 22000 and BRCGS Food Safety Standard clause 8.4.2 (process control monitoring) with auditable, calibrated pressure evidence.
• Integration into automated validation protocols alongside testo Saveris 2 temperature loggers for combined pressure–temperature F₀ and P₀ calculations.

FAQ

Is the testo 191-P1-HACCP suitable for use inside an autoclave chamber during full sterilization cycles?

Yes—it is rated for continuous operation at +121 °C and 2.1 bar abs (typical saturated steam conditions), with full IP68 protection and validated long-term stability under cyclic thermal stress.
Does battery replacement require recalibration?

No—the mechanical sealing architecture preserves metrological integrity; factory calibration remains valid after battery exchange.
Can the device be programmed to trigger alarms based on pressure thresholds?

No—the 191-P1-HACCP is a pure data logger without real-time alarm outputs; threshold evaluation is performed post-acquisition in testo 191 Professional software.
What is the maximum allowable measurement interval for extended battery life?

At 24-hour intervals, battery life extends beyond 10 years (based on accelerated aging models at +25 °C ambient); however, HACCP-critical applications typically require ≤60-second intervals for process fidelity.
Is raw data export compliant with FDA 21 CFR Part 11 requirements?

Yes—when used with testo 191 Professional software configured with audit trail enabled, electronic signatures, and secure user authentication, all exported data retains Part 11–compliant metadata and immutability controls.