Testo 805i Infrared Thermometer


Testo Approved distributor and service company.

The Testo 805i is an Infrared thermometer operated with your smartphone and is part of the Testo Smart Probe range.

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0560 1805


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£ 62.10 rrp £ 69.00

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(£ 74.52 inc VAT.)

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In combination with a smartphone or tablet, the infrared thermometer testo 805i functions as a compact measuring instrument for wall temperatures as well as for fuse and component temperatures in air conditioning systems. The measurement location is clearly marked with a multi-point laser circle.

Users can read off their measurement values comfortably in the testo Smart Probes App installed on the end device. Using the App, images including temperature value and laser marking can also be created and documented. In addition to this, the detection of mould-endangered areas is simplified by a special menu. The measurement protocols can then be directly sent as PDF or Excel files.

All measurement data are presented either as a diagram or in tabular form. The measurement data log can then be emailed directly as a PDF or Excel file. In the handy testo Smart Case, the measuring instruments can be conveniently transported and are always to hand when they are needed.


Compact professional measuring instrument from the Testo Smart Probes series, for use with smartphones/tablets.
Non-contact IR measurement of surface temperature.
Easy image documentation incl. measurement values and measurement spot marking.
Measurement spot marking with easily visible 8-point laser circle.
Measurement data analysed and sent via testo Smart Probes App.
Small, compact, and easy to transport.

Testo 805i Specifications:

  • Measuring range: -30 to +250 °C.
  • Accuracy ±1 digit: ±1.5 °C or ±1.5 % of reading 0 to +250 °C).
  • Resolution: 0.1 °C.
  • Operating temperature: -10 to +50 °C.
  • Battery type: 3 micro batteries AAA.
  • Battery life: 30 hrs.
  • Optics: 10:1.
  • Laser marking: Diffractive optics (laser circle).
  • Emissivity: 0.1 to 1.0 adjustable.
  • Compatability: requires iOS 8.3 or newer / Android 4.3 or newer.
  • Requires mobile end device with Bluetooth 4.0.
  • Dimensions: 140 x 36 x 25 mm.
  • Testo 805i Warranty: 2 years.


Includes: Smart probe Testo 805i, batteries and calibration protocol.

About The Testo Smart Probes App

The App turns your smartphone/tablet into the display of up to 6 Testo Smart Probes at the same time. The operation of the measuring instruments as well as the display of the measurement values take place by Bluetooth via the Testo Smart Probes App on your smartphone or tablet – independently of the measurement location. In addition to this, you can use the App to create measurement reports, add photos and comments to these, and send them by e-mail. The Testo Smart Probes App is completely free and is available for iOS from the App Store and Android via Google Play.

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Testo 805i Infrared Thermometer