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HACCP data loggers

High-efficiency validation of your pasteurization, sterilization and freeze-drying processes

HACCP data logger for process validation and qualification

The challenge: Validating sterilization, pasteurization and freeze-drying processes

The regular validation of sterilization, pasteurization and freeze-drying processes including the standard-compliant verification of successful process parameters is legally required and forms a key element of quality assurance. Equally critical are control and core temperature measurements as well as the precise calculation of lethality and holding phase – all including the corresponding standard-compliant verifications to the authorities.

In order to ensure that operating procedures run seamlessly, the handling of the loggers, the validation process and the documentation must all proceed as efficiently and smoothly as possible. The same applies to the calculation of relevant parameters.

The testo 191 all-in-one solution supports you with innovative data loggers, intuitive software and practical accessories to meet these challenges. So you can always rest assured that the qualification and validation of your processes will be carried out in an extremely efficient manner, in compliance with the standards.

The solution: The testo 191 HACCP data logger system

The testo 191 system components

HACCP data logger, multifunction case and Professional software

Data loggers

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Safe and reliable measurements: The data loggers

  • Robust: Tested for reliable operation from
    -50 to +140 °C during more than 1,500 operating hours

  • Simple: Battery replacement that is tool-free, safe and intuitive

  • Protected: Electronics in glass-metal bushing impervious to water

Multifunction case

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Configure and read out: The multifunctional case

  • Secure: Loggers transported in the built-in readout unit

  • Fast: Program and read out up to 8 data loggers in parallel

  • Error-free: Stable readout and programming

Intuitive operation: The Professional software

  • Guided: Preset, intuitive processes

  • Uncomplicated: Simple calculation of holding phase and lethality

  • Complete: Fast and comprehensive report generation

Which application interests you?


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testo 191 loggers in endurance testing

Test procedures and results on:

  • Robustness

  • Accuracy drift

  • Reliability of the battery


Further downloads

Application example


Application example


Factsheet testo 191


Product brochure testo 191