


| Protection class | IP54 |
|---|---|
| System requirements | requires iOS 17 or newer; requires Android 14 or newer; requires mobile end device with Bluetooth 4.0 |
| Field of view | 48° x 36° |
|---|---|
| Focus | Fixed focus |
| Minimum focus distance | 1 ft / 0.3 m |
| Image refresh rate | 9 Hz |
| Infrared resolution | 256 x 192 pixels |
| Thermal sensitivity | 50 mk |
| Spectral range | 8 to 14 µm |
| Minimum focus distance | 1 ft / 0.4 m |
|---|---|
| Image size | 640 x 480 pixels |
| Color palettes | iron, rainbow, rainbow HC, cold-hot, blue-red, grey, inverted grey, sepia, Testo, iron HAT, humidity palette |
|---|---|
| Digital zoom | yes |
| Display option | IR image / real image |
| (in the testo Smart App) | |
| Accuracy | 5.4°F (±3 °C) or ±3 % of m.v. (at ambient temp. 14°F to 104°F (-10 to 40 °C) and scene temp. 32°F to 302°F (0 to +150 °C) or 212°F to 662°F(+100 to +350 °C) |
|---|---|
| Emissivity | 0.01 to 1 |
| Measuring range | -4 to +662 °F (-20 to +350 °C) |
| Reflected temperature | manual; (via testo Smart App) |
| Analysis function | Hot/cold spots, Delta T, up to 10 selectable individual measuring points, area measurement (min./max. on area) |
|---|---|
| Electrical mode - manual | Input of current, voltage or power |
| 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 measurement with clamp meter | Automatic reading transfer of the optional testo 770-3 clamp meter via Bluetooth to the testo Smart App |
| Application-specific measurement functions | DeltaHeat; DeltaCool; Humidity mode |
| (in the testo Smart App) | |
| Full screen mode | yes |
|---|---|
| WLAN Connectivity | Communication with the testo Smart App; WIFI: IEEE 802.11a/n/ac* |
| Bluetooth | Peer-to-peer advertising for fast connection set-up* |
| Remote-controlled operation | Up to 32ft (10 m) from the mobile device |
| * 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. | |
| File format image | .bmt; .jpg; .csv |
|---|---|
| Storage device | On a mobile device |
| Battery type | Integrated Li-ion rechargeable battery |
|---|---|
| Charging options | USB-C |
| Charging time | Approx. 90 min (15-min charge of an empty battery equals 30 min of operating time) |
| Air humidity | 5 to 95 %RH, non-condensing |
|---|---|
| Vibration | IEC 60068-2-6 |
| Impact resistance test | 4.921 ft. / 1.5 m |
| Storage temperature | -4.0° to 158.0 °F / -20 to +70 °C |
| Operating temperature | 14.0° to 122.0 °F / -10 to +50 °C |
| Tripod mounting | 1/4" - 20UNC |
|---|---|
| Mobile device attachment | Clip span: min. 134 mm, max. 190 mm and device depth up to max. 12 mm |
| Weight | 6.9 oz. / 195 g |
| Dimensions | 6 x 2 x 1 in. / 165 x 45 x 38 mm |
| System requirements | Windows® 10; Windows® 11 |
|---|---|
| (testo IRSoft) | |
| Measuring range | -4° to 140 °F / -20 to +60 °C |
|---|---|
| Accuracy | ±1.4 °F (-4° to 32 °F) / ±0.8 °C (-20 to 0 °C) ±0.9 °F (32° to 140 °F) / ±0.5 °C (0 to +60 °C) |
| Resolution | 0.1 °F / 0.1 °C |
| Measuring range | 0 to 100 %rH |
|---|---|
| Accuracy | ±5 %rH (< 10 %rH or > 90 %rH) ±3.0 %rH (10 to 35 %rH) (at +77°F) / ±3.0 %RH (10 to 35 %RH) (at +25°C) ±2.0 %rH (35 to 65 %rH) (at +77°F) / ±2.0 %RH (35 to 65 %RH) (at +25°C) ±3.0 %rH (65 to 90 %rH) (at +77°F) / ±3.0 %RH (65 to 90 %RH) (at +25°C) |
| Resolution | 0.1 %rH |
| Weight | 3.05 oz. / 86.4 g |
|---|---|
| Dimensions | 10 x 1 x 1 in. / 243 x 30 x 24 mm |
| Operating temperature | -4° to 122 °F / -20 to +50 °C |
| Housing | Plastic |
| System requirements | requires iOS 11.0 or newer; requires Android 6.0 or newer; requires mobile end device with Bluetooth 4.0 |
| Product colour | black/orange |
| Battery type | 3 x AAA |
| Battery life | 150 h |
| Length probe shaft | 3.937 in. / 100 mm |
| Storage temperature | -4° to 140 °F / -20 to +60 °C |







