testo 835-T1 - 4 point Infrared Thermometer

  • Reliable IR measurement up to 600 °C 

  • IR measurements from a safe distance

  • Memory for up to 200 readings; easy analysis with free-to-download software

  • 4-point-laser and 50:1 optics for precise measurements over greater distances 

The practical infrared thermometer testo 835-T1 offers maximum safety and precision when measuring the temperature of smaller objects from a medium distance.

testo 0560 8351

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Get started in the field of intelligent infrared measuring technology. The practical infrared thermometer testo 835-T1 offers maximum safety and precision when measuring the temperature of smaller objects from a medium distance, e.g. monitoring wall temperature, troubleshooting in heating and air conditioning systems, or the quality control of industrially manufactured products.

  • The 4-point laser clearly indicates the measuring area and prevents incorrect measurements
  • The 50:1 optics allow you to carry out measurements from a long distance and still obtain excellent results (distance 5 m = 10 cm measuring spot)
  • The integrated degree of emission table enables you to select the correct degree of emission of the measured surface
  • The backlit display allows you to use your infrared thermometer in all lighting conditions

The testo 835-T1 also allows you to carry out contact temperature measurements. The thermometer is equipped with a connecting point for a wide range of optional temperature sensors. The temperature sensor can also be used to automatically measure the degree of emission of a particular surface. This makes it easier to carry out subsequent infrared measurements.

There is also a wide range of optional accessories - including a tripod and a robust carry case - that allow you to customize your testo 835-T1 infrared thermometer to suit your needs.

For easy analysis and easy use

The testo 835-T1 comes with an easy-to-follow menu, self-explanatory icons and a user-friendly joystick. Your infrared thermometer can be used to create different measuring sites or save up to 200 readings while additional features including min/max values, adjustable thresholds and visual and acoustic alarms which are triggered when thresholds have been exceeded make work more efficient and life easier. The free-to-download "EasyClimate " software provides you with a quick and convenient means of analyzing your measuring data.


Temperature - TC Type K (NiCr-Ni)
Measuring range
                            -50 to +600 °C
                            ±(0.5 °C + 0.5 % of mv)
                            0.1 °C


Temperature - Infrared
Measuring range
                            -30 to +600 °C
                            ±2.5 °C (-30.0 to -20.1 °C)
                            ±1.5 °C (-20.0 to -0.1 °C)
                            ±1.0 °C (0.0 to +99.9 °C)
                            ±1 % of mv (Remaining Range)
Infrared resolution
                            0.1 °C


General technical data
                            193 x 166 x 63 mm
Operating temperature
                            -20 to +50 °C
Product-/housing material
                            ABS + PC
Laser spot
                            on / off
Emissivity table
                            20 values
                            EN 61326-1:2006
Alarm function
                            audible; Optical
Auto-off backlight
                            30 s*
Auto-off instrument
                            120 s*
Battery type
                            3 batteries type AA (or USB operating with PC-Software)
Battery life
                            25 h (typical 25°C without laser and backlight) 10 h (typical 25°C without backlight)
Display type
                            Dot Matrix
                            200 measuring values
Storage temperature
                            -30 to +50 °C
                            514 g


*disabled for continuous measurement and USB connection

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