testo 862-2 Mould Kit - Thermal imager (256 x 192 pixels) and thermohygrometer

The testo 862-2 Mould Kit provides a professional solution for fast and reliable identification of mould-prone areas, combining thermal imaging with precise humidity measurement. Designed for HVAC professionals, landlords, and building inspectors, the kit enables accurate detection of insulation deficiencies, elevated humidity levels, and conditions that can lead to mould growth. With its intelligent mould detection, mould risk areas are highlighted using an easy-to-read traffic light indicator.

The testo 862-2 delivers thermal insights instantly and effortlessly. High image resolution and thermal sensitivity provide sharp thermal images, while Fusion technology adds visual context for easier interpretation.

To improve efficiency in the field, smart features such automatic Delta T calculation, hot/cold spot detection, and built-in alarms help users make faster and more reliable inspection decisions. In addition, the DeltaHeat mode provides instant feedback and smart diagnostics when assessing radiator performance.

With IP54 protection and 1.5 m drop resistance, the testo 862-2 is built to withstand tough environments in the field.

General technical data	Protection class IP54

Protection class

IP54

Infrared image output	Field of view 56° x 42°
Focus Fixed focus
Minimum focus distance 0.25 m
Geometric resolution (IFOV) 3.75 mrad
Image refresh rate 25 Hz
Infrared resolution 256 x 192 pixels
Thermal sensitivity < 50 mK @ +25°C
Spectral range 8 to 14 µm

Field of view

56° x 42°

Focus

Fixed focus

Minimum focus distance

0.25 m

Geometric resolution (IFOV)

3.75 mrad

Image refresh rate

25 Hz

Infrared resolution

256 x 192 pixels

Thermal sensitivity

< 50 mK @ +25°C

Spectral range

8 to 14 µm

Image output visual	Minimum focus distance 0.2 m
Visual resolution 2 MP

Minimum focus distance

0.2 m

Visual resolution

2 MP

Image presentation	Colours iron, rainbow, rainbow HC, cold-hot, blue-red, grey, inverted grey, sepia, Testo, iron HT, humidity palette
Digital zoom yes
Display option IR / Visual / Fusion / Picture in Picture / humidity mode
Video output Non-radiometric videorecording in instrument (AVI)
Maximum zoom 6.0X

Colours

iron, rainbow, rainbow HC, cold-hot, blue-red, grey, inverted grey, sepia, Testo, iron HT, humidity palette

Digital zoom

yes

Display option

IR / Visual / Fusion / Picture in Picture / humidity mode

Video output

Non-radiometric videorecording in instrument (AVI)

Maximum zoom

6.0X

Measurement	Accuracy ±2 °C / ±2 % of m.v. (@ +21 °C to +25 °C ambient temperature)
Emissivity 0.01 to 1
Measuring range -10 to 550 °C

Accuracy

±2 °C / ±2 % of m.v. (@ +21 °C to +25 °C ambient temperature)

Emissivity

0.01 to 1

Measuring range

-10 to 550 °C

Measuring function	Analysis function Hot spot, cold spot, DeltaHeat, delta T, 5 adjustable spots, 3 regions of interest
Humidity mode - manual yes
Humidity measurement with humidity measuring instrument Automatic transfer of the optional testo 605i thermohygrometer readings via Bluetooth directly to testo 862
Electrical measurement with clamp meter Automatic reading transfer of the optional testo 770-3 clamp meter via Bluetooth directly to testo 862
Application-specific measurement functions Humidity mode; DeltaHeat
Electrical mode - Manual yes

Analysis function

Hot spot, cold spot, DeltaHeat, delta T, 5 adjustable spots, 3 regions of interest

Humidity mode - manual

yes

Humidity measurement with humidity measuring instrument

Automatic transfer of the optional testo 605i thermohygrometer readings via Bluetooth directly to testo 862

Electrical measurement with clamp meter

Automatic reading transfer of the optional testo 770-3 clamp meter via Bluetooth directly to testo 862

Application-specific measurement functions

Humidity mode; DeltaHeat

Electrical mode - Manual

yes

Imager equipment	Full screen mode yes
WLAN Connectivity Communication with the testo Smart App; WLAN: IEEE 802.11b/g/n
Bluetooth Peer-to-peer for fast connection set-up

Full screen mode

yes

WLAN Connectivity

Communication with the testo Smart App; WLAN: IEEE 802.11b/g/n

Bluetooth

Peer-to-peer for fast connection set-up

Imager storage	File format image .bmt; .jpg
Storage capacity 12 GB available for user

File format image

.bmt; .jpg

Storage capacity

12 GB available for user

Power supply	Battery type Integrated Li-ion rechargeable battery
Charging options USB-C
Charging time 15-min charge of an empty battery equals 25-min of Operation; Approx. 170 min
Battery life 3 h @ +25 °C

Battery type

Integrated Li-ion rechargeable battery

Charging options

USB-C

Charging time

15-min charge of an empty battery equals 25-min of Operation; Approx. 170 min

Battery life

3 h @ +25 °C

Ambient Condition	Air humidity 5 to 95 %RH, non-condensing
Housing protection class IP54
Vibration ISO2247:2000-03
Impact resistance test 1.5 m
Device shock IEC 60068-2-27 with 30 g
Storage temperature -20 to +70 °C
Operating temperature -10 to +50 °C

Air humidity

5 to 95 %RH, non-condensing

Housing protection class

IP54

Vibration

ISO2247:2000-03

Impact resistance test

1.5 m

Device shock

IEC 60068-2-27 with 30 g

Storage temperature

-20 to +70 °C

Operating temperature

-10 to +50 °C

Physical specification	Tripod mounting 1/4” UNC thread
Weight 215 g
Dimensions 135 x 88 x 25 mm

Tripod mounting

1/4” UNC thread

Weight

215 g

Dimensions

135 x 88 x 25 mm

PC software	System requirements Windows® 11; Windows® 10
(testo IRSoft)

System requirements

Windows® 11; Windows® 10

(testo IRSoft)

Temperature - NTC	Measuring range -20 to +60 °C
Accuracy ±0.8 °C (-20 to 0 °C) ±0.5 °C (0 to +60 °C)
Resolution 0.1 °C

Measuring range

-20 to +60 °C

Accuracy

±0.8 °C (-20 to 0 °C)

±0.5 °C (0 to +60 °C)

Resolution

0.1 °C

Humidity - Capacitive	Measuring range 0 to 100 %RH
Accuracy Hysteresis: ±1.0 %RH ±2.0 %RH (35 to 65 %RH) (at +25°C) long-term stability: ±1 %RH / year ±5 %RH (< 10 %RH or > 90 %RH) ±3.0 %RH (65 to 90 %RH) (at +25°C) ±3.0 %RH (10 to 35 %RH) (at +25°C)
Resolution 0.1 %RH

Measuring range

0 to 100 %RH

Accuracy

Hysteresis: ±1.0 %RH

±2.0 %RH (35 to 65 %RH) (at +25°C)

long-term stability: ±1 %RH / year

±5 %RH (< 10 %RH or > 90 %RH)

±3.0 %RH (65 to 90 %RH) (at +25°C)

±3.0 %RH (10 to 35 %RH) (at +25°C)

Resolution

0.1 %RH

General technical data	Weight 86.4 g
Dimensions 218 x 30 x 27 mm
Operating temperature -20 to +50 °C
Product-/housing material Plastic
System requirements requires iOS 13.0 or newer; requires Android 8.0 or newer; requires mobile end device with Bluetooth 4.2
Product colour black/orange
Battery life 150 h
Battery type 3 AAA micro batteries
Length probe shaft 100 mm
Data transfer Bluetooth®
Radio range 100
Storage temperature -20 to +60 °C

Weight

86.4 g

Dimensions

218 x 30 x 27 mm

Operating temperature

-20 to +50 °C

Product-/housing material

Plastic

System requirements

requires iOS 13.0 or newer; requires Android 8.0 or newer; requires mobile end device with Bluetooth 4.2

Product colour

black/orange