The Testo 860i Electrical Kit combines two powerful diagnostic tools in one package: the Testo 860i Wireless Thermal Imaging Camera and the Testo 770-3 Clamp Meter.
The 860i delivers high-resolution thermal images (256 × 192 pixels) with excellent sensitivity. At the same time, the 770-3 Clamp Meter provides True RMS measurement of current, voltage, and resistance.
Built for professional use, both instruments are IP54-rated, resistant to a 1.5 m drop, and powered by long-lasting rechargeable batteries. By combining visual thermography with accurate electrical measurement, the kit streamlines diagnostics, reduces troubleshooting time, and improves overall accuracy.
The Testo Smart App allows real-time data synchronisation between the two devices. Results can be viewed, stored, and shared instantly. Explore our Testo 860i Wireless Thermal Imaging Camera and Testo 770-3 - TRMS Clamp Meter listings for further information.
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 a 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. |
Temperature - TC Type K (NiCr-Ni) | |
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Measuring Range | -20 to +500 °C |
Accuracy | ±1 °C (0 to +100 °C) |
Resolution | 0.2 °C |
DC Voltage | |
Measuring Range | 1.0 to 600.0 V |
Resolution | max. 1 mV |
Accuracy | ± (0.8 % of mv + 3 Digit) |
AC Voltage | |
Measuring Range | 1.0 mV to 1000.0 V |
Resolution | max. 1 mV |
Accuracy | ± (1 % of mv + 3 Digit) |
DC Current | |
Measuring Range | 0.01 to 600.0 A (clamp) 0.1 to 600.0 μA (measuring cables) |
Resolution | 0.1 (clamp) 0.1 (measuring cables) |
Accuracy | ± (2 % of mv + 5 Digit) (measuring cables) ± (2 % of mv + 5 Digit) (clamp) |
AC Current | |
Measuring Range | 0.01 to 600.0 A (clamp) 0.1 to 600.0 μA (measuring cables) |
Resolution | 0.01 A (clamp) 0.1 μA (measuring cables) |
Accuracy | ± (2 % of mv + 5 Digit) (clamp) ± (1.5 % of mv + 5 Digit) (measuring cables) |
Resistance | |
Resolution | max. 0.01 Ohm |
Measuring Range | 0.10 to 60.0 MOhm |
Accuracy | ± (1.5 % of mv + 3 Digit) |
Capacitance | |
Resolution | max. 0.01 nF |
Measuring Range | 0.001 μF to 60000.00 μF |
Accuracy | ± (1.5 % of mv + 5 Digit) |
Frequency | |
Resolution | max. 0.1 Hz |
Measuring Range | 0.00 Hz to -10 kHz |
Accuracy | ± (1 % of mv + 1 Digit) |
Active Power | |
Measuring Range | 0.1 W to 600 kW |
Accuracy | ± (5 % of mv + 5 Digit) |
Resolution | 0.1 W |
Reactive Power | |
Measuring Range | 0.1 to 600.0 kvar |
Accuracy | ± (10 % of mv + 5 Digit) |
Resolution | 0.1 var |
Apparent Power | |
Measuring Range | 0.1 VA to 600.0 kVA |
Accuracy | ± 1 Digit |
Resolution | 0.1 VA |
Direct Current DC Voltage | |
Measuring Range | 0.1 W to 600.0 kW |
Accuracy | ± 1 Digit |
Resolution | max. 0.1 W |
Power Factor | |
Measuring Range | -1.00 to +1.00 |
Accuracy | ± (10 % of mv + 5 Digit) |
Resolution | 0.01 |
General Technical Data | |
Operating Humidity | 0 to 80.0 %RH |
Weight | 378 g |
Dimensions | 249 x 96 x 43 mm |
Operating Temperature | -10 to +50 °C |
Connectable Probes | 1 x temperature probe (adapter required for type K thermocouples) |
Product Colour | Black |
System Requirements | requires iOS 11.0 or newer; requires Android 6.0 or newer; requires a mobile end device with Bluetooth 4.0 |
Standards | EN 61326-1; EN 61010-2-032; EN 61140 |
Battery Type | 3 AAA micro batteries |
Display Size | 2 lines |
Display Type | LCD (Liquid Crystal Display) |
Interface | 2 measuring jacks |
Storage Temperature | -15 to +60 °C |
Overvoltage Category | CAT IV 600V; CAT III 1000V |
Authorizations | CSA; CE |
Internal_resistance | 11 MOhm (AC / DC) |
Instrument Measurement Functions | |
Diode Test | Yes |
Continuity Testing | Yes |
Display Lighting | Yes |
Hold | Yes |
MinMax | Yes |
Power Measurement | Yes |
Temperature Measurement with Adaptor | Yes |
True RMS | Yes |
Inrush Current Measurement | Yes |
Bluetooth | Yes |
Display (Counts) | 6,000 |
Automatic Measurement Parameter Detection | Yes |
µA Current Measuring Range | Yes |