testo 835-H1 - Infrared thermometer and moisture meter

Order-Nr.  0560 8353

  • Measures temperature / moisture / dew point

  • Calculates surface moisture content

  • Easy to follow menu guide, memory of up to 200 readings, data analysis with free to download software

  • 4-point laser and 50:1 optics for precise measurements, even over long distances

Non-contact temperature and moisture measurements using only one device. The testo 835-H1 infrared thermometer measures the air temperature, and has an intergrated moisture sensor for measuring moisture, too.

Delivery time: 12 working days

Shipping costs

Product Description

Perform temperature and moisture measurements on walls, monitor and check air conditioning and ventilation systems, service and inspect industrial systems, and ensure constantly high levels of quality in production processes. Ideal for a wide range of industrial and commercial applications.

What the testo 835-H1 infrared thermometer and moisture meter can do

  • Measure surface temperature / RH and check dew point / surface moisture
  • Timely detection of mold in buildings
  • Carry out quick and safe measurements on small / moving / hard to reach objects

State of the art technology and easy handling

  • 4-point laser shows exact measuring zone, effectively preventing incorrect measurements
  • 50:1 optics for excellent surface temperature measurements, even over greater distances (distance 16 ft  = 4 in. measurement spot)
  • Adjustable degree of emission (for measuring a wide variety of different surfaces)
  • Connectivity for temperature sensors for additional contact measurements (for materials with low degrees of emission). Simply connect optional temperature sensor
  • Easy to use, easy to follow menu guide, thanks to icons and joystick
  • Generate measuring points and save up to 200 measurements
  • Define individual alarm thresholds, acoustic and optical alarm
  • Display min/max values
  • Backlit display


Delivery Scope

testo 835-H1 infrared thermometer and moisture meter, 4-point laser marking, measuring data management, moisture module, batteries, and calibration protocol
Temperature - Type K TC

Measuring range

-58° to 1112 °F / -50 to +600 °C


±(0.9 °F + 0.5 % of mv) / ±(0.5 °C + 0.5 % of mv)


0.1 °F / 0.1 °C

Temperature - Infrared

Measuring range

-22 to 1112 °F / -30 to +600 °C


±4.5 °F (-22.0° to -4.2 °F) / ±2.5 °C (-30.0 to -20.1 °C)

±2.7 °F (-4.0° to 31.8 °F) / ±1.5 °C (-20.0 to -0.1 °C)

±1.8 °F (32.0° to +211.8 °F) / ±1.0 °C (0.0 to +99.9 °C)

±1 % of mv (Remaining Range)

Infrared resolution

0.1 °F / 0.1 °C

Humidity - Capacitive

Measuring range

0 to 100 %rH


±2 %rH

±0.9 °F / ±0.5 °C


0.1 °F / 0.1 °C

0.1 %rH

0.1 °Ctd

General technical data


8 x 7 x 2 in. / 193 x 166 x 63 mm

Operating temperature

-4° to 122 °F / -20 to +50 °C



Laser spot

on / off

Emissivity table

20 values


EN 61326-1:2006


audible; rpm - Optical

Auto-off backlight

30 sec*

Auto-off instrument

120 sec*

Battery type

3 AA Batteries (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

-22° to 122 °F / -30 to +50 °C


18 oz. / 514 g

*disabled for continuous measurement and USB connection

Air Probes

Surface probes


USB connection cable

Order Number: 0449 0047

$ 26.00
excl. tax
$ 107.00
excl. tax

Location of thermal bridges and mould formation

With the testo 835-H1, you can identify thermal bridges (places on walls, floors and ceilings where there is a greater outflow of heat than at points nearby, mainly due to structural defects) for early detection or identification of structural defects, energy loss and places where there is a risk of mould formation.

Advantages of the testo 835-H1:

  • Fast detection of thermal bridges by scanning the walls, even at great distances
  • Measurement of the dewpoint, dewpoint distance and aw value (surface moisture) to assess conditions of the room and wall
  • Saving the data for documentation and comparison with previous measurements in order to evaluate corrective measures