The Testo 860i Wireless Thermal Imaging Camera is suitable for HVAC professionals, building inspectors, and industrial maintenance teams. With a crisp infrared resolution of 256 × 192 pixels and a sensitivity of just 50 mK, it delivers sharp, detailed images that reveal subtle temperature differences across a wide range of surfaces.
The DeltaHeat and DeltaCool functions simplify Delta T analysis. They assess flow and return line temperatures in heating systems, differential readings in refrigeration and air conditioning units. The humidity mode highlights areas at risk of mould formation.
The Testo Smart App stores, analyses, and shares images instantly from a smartphone or tablet. The app also provides comprehensive reporting tools and integrates with other Testo measurement instruments.
The Testo 860i measurement range is –20°C to +350°C, the field of view is 48° × 36°, and the refresh rate is 9 Hz. The camera also has IP54-rated protection, resistance to drops of up to 1.5 m, and a long-lasting rechargeable lithium battery.
Infrared Image Output | |
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Infrared Resolution | 256 x 192 pixels |
Thermal Sensitivity (NETD) | 50 mK |
Field of View (VFOV/HFOV)/ min. Focusing Distance | 48° x 36° / 0.3 m |
Geometric Resolution (IFOV) | 3.3 mrad |
Image Refresh Rate | 9 Hz |
Focus | Fixed |
Spectral Range | 8 to 14 µm |
Visual Image Output | |
Image Size/min. Focusing Distance | 640 x 480 pixels / 0.4 m |
Measurement | |
Measuring Range | -20 to +350 °C |
Accuracy | ±3 °C or ±3 % of m.v. (at ambient temperature of -10... +40 °C and scene temperature of 0... +150 °C or +100... +350 °C) |
Emissivity/Reflected Temperature Adjustment | 0.01 to 1 / manual (via Testo Smart App) |
Measurement Functions (in the Testo Smart App) | |
Analysis Functions | Hot/cold spots, Delta T, up to 10 selectable individual measuring points, area measurement (min./max. on area) |
Application-Specific Measurement Functions | DeltaHeat, DeltaCool, humidity mode |
Humidity Mode - Manual | Yes |
Humidity Measurement with Humidity Measuring Instrument | Automatic transfer of the optional Testo 605i or Testo 625 thermohygrometer readings via Bluetooth to the Testo Smart App |
Electrical Mode - Manual | Input of current, voltage or power |
Electrical Measurement with Clamp Meter | Automatic reading transfer of the optional Testo 770-3 Clamp Meter via Bluetooth to the Testo Smart App |
Image Presentation (in the Testo Smart App) | |
Display Options | IR image, real image (overlay in IRSoft possible) |
Fullscreen Mode | Yes |
Colour Palettes | Iron, rainbow, rainbow HC, cold-hot, blue-red, grey, inverted grey, sepia, Testo, iron HT, humidity palette |
Digital Zoom | Yes |
General App Functions | |
File Format | Share saved images as .bmt (for editing in IRSoft), .jpg, and .csv files with the Testo Smart App |
Image Storage | On a mobile device |
Remote-controlled Operation | Up to 10 m from the mobile device (via WLAN) |
Power Supply | |
Battery Type | Integrated Li-ion rechargeable battery |
Battery Life | 2 hours |
Charging Interface | USB-C |
Charging Time | Approx. 90 min A 15-minute charge of an empty battery equals 30 minutes of operating time |
Ambient Conditions | |
Operating Temperature Range | -10 to +50 °C |
Storage Temperature Range | -20 to +70 °C |
Air Humidity | 5 to 95 %RH, non-condensing |
Housing Protection Class (IEC 60529) | IP54 |
Impact Resistance Test | 1.5 m |
Vibration | IEC 60068-2-6 |
Physical Features | |
Weight | 195 g |
Dimensions | 165 x 45 x 38 mm |
Mobile Device Attachment | Clip span: min. 120 mm, max. 170 mm and device depth up to max. 12 mm |
Tripod Socket | ¼" UNC thread |
Compatibility | |
Testo Smart App | Requires iOS 17 or later/Android 14 or later Requires mobile terminal device with Bluetooth 4.0 |
PC Software Testo IRSoft | Windows 11, Windows 10 |
Data Interface | |
WLAN* | Communication with the Testo Smart App WLAN: IEEE 802.11b/g/n |
Bluetooth* | Peer-to-peer advertising for fast connection set-up |
* An overview of the radio authorisations in the different countries can be found in the download section of the Testo 860i product page in the "Quick Start Guide Testo 860i" document. |