Testo 845 Data sheet

Committing to the future

testo 845

Infrared Thermometer with Measurement Point Marking

Switchable optics for far field and close focus non-contact temperature measurement

NEW!

°C

Applications:

• Heating

• Air conditioning
and ventilation

• Manufacturing

• Machines

• Plus much more!

Benefits:

• Far-field and close
focus non-contact
temperature
measurement

• 2 in 1 instrument
offering significant
cost savings

• Broad
measurement
range of

-35 to +950 °C

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Precise small measurement point for both near and
far distances using new SWITCH optics.

The Testo 845 is a milestone in non-contact temperature measurement offering the ability to ‘switch’
between close focus and far-field measurements. For the first time, surface temperatures with a
measurement point diameter down to 1mm can be measured and cross laser marking means that
accurate measurements can be taken even at large distances.

The Testo 845 infrared thermometer offers fast temperature measurement. Min./max. values and
exceeded limit values are updated at a time interval of 100 ms, enabling quick scans and evaluations

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of surfaces.

The Testo 845 guarantees a high level of accuracy in non-contact temperature measurement. In the
temperature range from -35 to +950 °C, a measurement accuracy of up to ±0.75 °C is achieved.
External thermocouple probes can be attached and used for measuring temperatures when the degree
of emission is not known. The Testo 845 also offers an adjustable emissivity factor from 0.1 to 1.0.

75:1 Far-field optics with cross laser for large distances:

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For measurements at greater distances, the Testo 845 is equipped with 75:1 optics. A laser cross
marks the exact measurement point at any distance. This ensures that the diameter of the
measurement point is recognisable at all times during measurement therefore eliminating the risk of
incorrect measurements.

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Measurement point diameter and distance from the measurement surface

Switching:

The optics are switched from far-field to close focus with the slide switch.

Close focus optics with 1 mm measurement point for small distances:

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With the close focus optics measurement of surface temperatures with a point diameter up to 1 mm can be
undertaken. A 2-point laser marks the exact of the measurement point.

Measurement point diameter and distance from the measurement surface