testo 108 Waterproof Food Thermometer

Overview

The testo 108 Waterproof Food Thermometer is a purpose-built digital temperature measurement instrument engineered for rapid, accurate, and hygienic core temperature verification across the entire food supply chain—from raw material receipt and cold chain monitoring to production line checks, catering operations, and retail storage. It operates on the principle of thermoelectric voltage generation in standardized noble-metal (Type K) or copper-constantan (Type T) thermocouples, enabling direct contact measurement of solid, semi-solid, and liquid food matrices. Its design adheres to the fundamental requirements of Hazard Analysis and Critical Control Point (HACCP) systems: speed (≤10 s t₉₀ response in dynamic media), traceability (factory calibration documentation included), and operational robustness under demanding sanitary conditions. Unlike general-purpose thermometers, the testo 108 integrates regulatory compliance—specifically EN 13485 for medical device quality management applicability to food safety instrumentation—into its mechanical architecture and user workflow.

Key Features

• IP67-rated waterproof housing (including Softcase), permitting full immersion and dishwasher-safe cleaning—critical for cross-contamination prevention in multi-shift food facilities.
• Dual thermocouple support: ships with a precision-insertion Type T probe optimized for food tissue penetration; additionally compatible with any standard miniature or heavy-duty Type K or Type T thermocouple via the universal micro-connector.
• Large, high-contrast single-line LCD display with 0.1 °C resolution and automatic backlight activation—ensuring legibility in low-light environments such as refrigerated warehouses or early-morning prep areas.
• Two-button intuitive interface (ON/OFF + HOLD/UNIT) eliminating need for operator training or menu navigation—reducing human error during time-sensitive critical control point (CCP) checks.
• Integrated Softcase serves dual function: impact protection during transport and validated cleaning compatibility—validated per EN ISO 15883-1 for thermal disinfection cycles in commercial dishwashers.
• Long-life rechargeable AAA battery system delivering up to 2500 hours of continuous operation at ambient temperature, minimizing downtime and maintenance overhead.

Sample Compatibility & Compliance

The testo 108 is validated for direct-contact measurement of heterogeneous food samples including meat cuts, poultry portions, dairy products, baked goods, and chilled/frozen prepared meals. Its stainless-steel probe tip (included Type T) meets EC No. 1935/2004 requirements for food contact materials. Regulatory alignment extends beyond functional performance: the device conforms to EN 13485:2016 for quality management systems applicable to devices supporting food safety assurance, and complies with the EU Electromagnetic Compatibility Directive 2004/108/EC. While not a medical device, its metrological traceability—supported by factory calibration certificate with uncertainty values referenced to national standards (e.g., PTB)—meets internal audit and third-party certification requirements under BRCGS Food Safety Issue 9, IFS Food v7, and SQF Edition 9. Documentation includes full calibration record and declaration of conformity, satisfying GLP-aligned record-keeping expectations for temperature-critical process validation.

Software & Data Management

The testo 108 operates as a standalone field instrument without proprietary software dependency—ensuring immediate deployment without IT infrastructure integration. All measurements are displayed in real time with HOLD functionality for stable reading capture and manual transcription into logbooks or digital quality management systems (QMS). For organizations requiring electronic data capture, the device supports seamless integration via external Bluetooth adapters (e.g., testo Saveris 2 gateway, sold separately) enabling automated timestamped logging compliant with FDA 21 CFR Part 11 Annex 11 principles when paired with validated QMS platforms. Calibration history and instrument ID can be manually entered into audit-ready spreadsheets or LIMS systems using the unique serial number engraved on the housing.

Applications

• Receiving inspection: Rapid verification of incoming chilled/frozen goods against transport temperature logs per ISO 22000 Clause 8.5.2.
• Thermal process validation: Monitoring core temperature during cooking, cooling, reheating, and hot-holding per FDA Food Code 3-501.12 and EC Regulation 852/2004 Annex II Chapter IX.
• Cold chain integrity: Spot-checking pallets, containers, and blast freezers to ensure maintenance of ≤+8 °C (chilled) or ≤–18 °C (frozen) thresholds.
• HACCP record-keeping: Generating auditable temperature evidence at CCPs—e.g., post-cook hold verification, cold holding for ready-to-eat foods, or thawing validation.
• Training and internal auditing: Used as a reference standard for staff competency assessments and periodic equipment verification across central kitchens, contract catering sites, and distribution centers.

FAQ

Is the testo 108 certified for use in regulated food production environments?
Yes—it carries CE marking per EU directives, complies with EN 13485 for quality management relevance, and meets HACCP technical prerequisites for accuracy, speed, and hygiene. Factory calibration documentation supports ISO/IEC 17025 traceability when used within an accredited lab’s scope.

Can the instrument be calibrated on-site by users?
While field zero-point verification using ice water (0 °C) or boiling water (100 °C at sea level) is possible, full recalibration requires accredited service laboratories due to thermocouple reference junction compensation and nonlinearity correction. testo-certified service centers provide NIST-traceable recalibration with updated certificates.

Does the IP67 rating apply with or without the Softcase?
The IP67 rating is confirmed only when the instrument is used with the supplied Softcase, which seals the connector port and provides additional ingress protection. The bare unit achieves IP54 per IEC 60529.

What is the recommended recalibration interval?
Per ISO 10012 and industry best practice, recalibration is advised every 12 months—or prior to critical audits, after mechanical shock, or if drift exceeding ±0.5 °C is observed during routine verification checks.