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Penetration thermometer

Penetration thermometers are designed specifically for measurement in liquids and viscoplastic media (meat, fish, dough, etc.). For instance, insertion into yogurt or milk packaging enables the real core temperatureof the product to be determined.

Penetration thermometers from Testo

Penetration thermometers for every challenge

This measuring method is very accurate and reliable for certainty of product temperature.

However, the disadvantage is that a product that has been "pierced" can no longer be sold and therefore must either be processed as quickly as possible, or disposed of.

Testo thermometers offer you:

  • Robust construction

  • Precise results

  • Intuitive handling

Testo Penetration Thermometers

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Measuring correctly with a digital penetration thermometer

For measurements with a probe thermometer, the temperature probe is inserted directly into the measurement object. The measurement is finished when the so-called t99 time is reached. That is the time which a probe needs to achieve 99% of its final value. The 90% value is achieved considerably sooner, but it takes just as long again to get from the 90% value to the 99% value. All data concerning the acclimatization time of temperature probes in Testo documents refer to the t99 time.

Digital penetration thermometer

testo 104-IR Penetration Probe

Reliable and fast temperature measurement with an penetration thermometer is of particular importance in the food sector. However, in addition to core temperature measurements, non-contact measurement of surface temperatures are required The testo 104-IR BT combined instrument was specifically developed for this. It combines penetration and infrared thermometers in a compact format.


The infrared penetration thermometer features:

  • precise 2-point laser with 10:1 lens for easy control at a distance

  • fold-out penetration probe for core temperatures

  • robust construction and compact format – when folded away, it fits into a shirt pocket.

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testo Smart App

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The testo Smart App guides you quickly and easily through measurements on refrigeration, air conditioning and heating systems

Now new:

PRO measuring programs for increasing the efficiency of your applications

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