Image
  1. Home
  2. testo 835-H1
0560 8353

testo 835-H1 - 4 point Infrared Thermometer

testo 835-H1
testo 835-H1
The testo 835-H1 is a high-precision infrared thermometer with an integrated moisture sensor, enabling simultaneous temperature, moisture, and dew point measurement. Featuring 4-point laser targeting, 50:1 optics, and surface moisture calculation, it is ideal for building diagnostics, HVAC applications, and industrial maintenance.
  • Multi-Function Measurement – Measures temperature, moisture, and dew point in one device.
  • Safe & Precise Distance Measurement – 50:1 optics and 4-point laser ensure accuracy from afar.
  • Built-in memory for up to 200 readings – Store and analyse data with free-to-download software.
  • Surface Moisture Calculation – Helps detect mould risk before it develops.
The testo 835-H1 Infrared Thermometer is the perfect tool for professionals needing non-contact temperature and moisture measurements in HVAC, building diagnostics, and industrial applications. It allows for the measurement of surface temperature, relative humidity, dew point, and surface moisture, helping to detect mould risks before they develop.

Equipped with 4-point laser targeting and 50:1 optics, the testo 835-H1 ensures precise measurements over long distances, eliminating errors and improving efficiency. The adjustable emissivity function ensures accuracy on different surface materials. Additionally, the device supports external temperature probe connectivity for contact measurements when needed.

Designed for ease of use, the testo 835-H1 features an intuitive menu, adjustable alarm thresholds, and a memory capacity of up to 200 readings. The free-to-download software enables easy data analysis and reporting.

With a backlit display for readability in all lighting conditions and optional accessories such as a tripod and carry case, the testo 835-H1 is the ultimate tool for efficient, precise, and versatile temperature and moisture analysis.

Temperature - TC Type K (NiCr-Ni)

Measuring range
-50 to +600 °C
Accuracy
±(0.5 °C + 0.5 % of mv)
Resolution
0.1 °C

Temperature - Infrared

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

Humidity - Capacitive

Measuring range
0 to 100 %RH
Accuracy
±2 %RH
±0.5 °C
Resolution
0.1 %RH
0.1 °C
0.1 °Ctd

testo 835-H1 infrared thermometer plus moisture measuring function and 4-Point laser marking, measurement data management, moisture module, batteries, calibration protocol.

Air probes

Robuster Luftfühler, TE Typ K

: 0602 1793

Robust air temperature probe (TC type K)

Short response time – due to exposed sensor design.

£ 69.00 £ 82.80

Food probes

Wasserdichter Lebensmittelfühler aus Edelstahl (IP65)

: 0602 2292

Waterproof stainless steel food probe (TC type K)

Wide Temperature Range – Measures from -60 to +400 °C, suitable for various food applications.

£ 90.00 £ 108.00

Surface probes

Spare meas. head for pipe wrap probe, TC Type K

: 0602 0092

Spare measuring head for pipe wrap probes (TC type K)

Easy Replacement – Quickly swap out old or damaged measuring heads for uninterrupted operation.

£ 55.00 £ 66.00
Fast-reaction paddle surface probe

: 0602 0193

Fast-reaction paddle surface probe (TC type K) - for measurement in places that are difficult to access

Reliable Measurements – Ideal for narrow openings and hard-to-reach areas.

£ 139.00 £ 166.80
Fast-action surface probe with sprung thermocouple strip

: 0602 0393

Fast-action surface probe (TC type K)

Extremely Fast Response Time (3 Seconds) – Thanks to the thermocouple strip, ensuring quick and precise temperature readings.

£ 135.00 £ 162.00
Efficient, waterproof surface probe with small measurement head

: 0602 0693

Surface probe with a small measuring head (TC type K)

Fast Response Time  – Ensures quick and accurate measurements.

£ 120.00 £ 144.00
Fast-action surface probe with sprung thermocouple strip

: 0602 0993

Fast-action, angled surface probe (TC type K)

Fast 3-Second Response Time – Thermocouple strip enables quick and precise measurement.

£ 165.00 £ 198.00
Waterproof surface probe with widened measurement tip

: 0602 1993

Surface probe with widened measuring tip (TC type K)

Extra-wide measuring tip – ideal for accurate readings on flat surfaces.

£ 69.00 £ 82.80

immersion/ penetration probes

Efficient and fast-action immersion probe, waterproof

: 0602 0593

Flexible, fast-action immersion probe (TC type K)

Fast Response Time (2 Seconds) – Ensures quick and accurate measurements.

£ 105.00 £ 126.00
Waterproof immersion/penetration probe, TC Type K

: 0602 1293

Waterproof immersion/penetration probe (TC type K)

Fast response time – approx. 7 seconds.

£ 55.00 £ 66.00
Fast-action, waterproof immersion/penetration probe

: 0602 2693

Fast-action immersion/penetration probe (TC type K)

Fast 3-Second Response Time – Thermocouple strip enables quick and precise measurement.

£ 125.00 £ 150.00
Tauch-Messspitze, biegsam, TE Typ K

: 0602 5792

Immersion measuring tip (TC plug type K)

Wiry measuring tip for fast measurement of temperatures

£ 30.00 £ 36.00

Accessories

Connection cable

: 0449 0047

USB connection cable, instrument-PC

Ideal for data transmission between PC and measuring instrument

Silicone heat paste

: 0554 0004

Silicone thermal paste

To improve heat transfer in surface probes

£ 20.00 £ 24.00
Adhesive tape, e.g. for reflective surfaces

: 0554 0051

Emission tape - for measurements on reflective surfaces

Accurate Temperature Measurement - Ensures precise readings on reflective surfaces.

£ 85.00 £ 102.00
PC Software testo EasyClimate

: 0501 0485

testo EasyClimate v3.4 SP1 - PC software

PC software for reading out the data from corresponding Testo measuring instruments (e.g. testo 480, testo 835)

Cases

testo 0516 8451 case

: 0516 8451

Service case for measuring instrument, probes and accessories

Perfect for suitable measuring instruments (e.g. testo 835), probes and accessories

£ 89.30 £ 107.16
Contact Us
Testo Ltd
Newman Lane
GU34 2URAlton
HampshireUnited Kingdom
01420 544433

Opening hours

Monday-Thursday: 8:30am - 17:00pmFriday: 8:30am - 16:00pm
Image
Blog

Visit our blog

© 2026