TESTO 871 Thermal imager

Infrared image output
Infrared resolution: 240 x 180 pixels
Thermal sensitivity(NETD): 90 mK
Field of view/min. focusing distance: 35° x 26° /< 0.5 m
Geometric resolution (IFOV): 2.6 mrad
testo SuperResolution (Pixel/IFOV): 480 x 360 pixels/ 1.6 mrad
Image refresh rate: 9 Hz
Focus: Auto focus
Spectral range: 7.5 to14 µm
Visual image outputImage size /: min. focusing distance at least 3.1 MP /0.5 m
Image presentation
Image display: 8.9 cm (3.5") TFT, QVGA (320 x 240 pixels)
Display options: IR image
Colour palettes: iron, rainbow HC, cold-hot, grey
Data interfaces
WLAN Connectivity : Communication with the testo Thermography App
Bluetooth: Measurement value transfer from
thermohygrometer testo 605i,clamp meter testo 770-3 (optional)
USB 2.0 Micro B: yes
Measurement
Measuring range: 
Measuring range 1: -30 to +100 °C
Measuring range 2: 0 to +650 °C
Accuracy: ±2 °C, ±2 % of measured value
Emissivity /reflected temperaturecompensation: 0.01 to 1 / manual
testo ε-Assist : Automatic recognition of emissivity and
determination of reflected temperature (RTC)
Measurement functions
Analysis functions: Mean point measurement,
hot/cold-spot recognition, Delta T,
testo ScaleAssist : Yes
IFOV warner : Yes
Imager equipment
Digital camera: Yes
Lens : 35° x 26°
Video streaming : via USB, via wireless LAN with testo Thermography App
Storage as JPG: Yes 
Fullscreen mode : Yes
Image storage
File format : .bmt and .jpg; export options in .bmp, .jpg,.png, .csv, .xls
Memory : Internal memory (2.8 GB)
Power supply
Battery type : Li-ion battery can be changed on-site
Operating time : 4 hours
Charging options : In instrument/in charging station (optional)
Mains operation: Yes
Ambient conditions
Operating temperature range : -15 to +50 °C
Storage temperature range : -30 to +60 °C
Air humidity : 10 to 90 %RH, not condensing
Housing protection class(IEC 60529): IP54
Vibration (IEC 60068-2-6) : 2G
Physical features
Weight : 510 g
Dimensions (LxWxH) : 219 x 96 x 95 mm
Housing : PC - ABS
PC software
System requirements : Windows 10, Windows 8, Windows 7
Standards, tests
EU directive : EMC: 2014/30/EU; RED: 2014/53/EU

Optional Accessories 
- Spare battery, additional Lithium ion
rechargeable battery for extending the
operating time.: 0515 5107
- Battery charger, desktop charging station
for optimizing the charge time.: 0554 1103
- testo ε-marker (10 off), markers for the testo ε-Assist function for the automatic determination of emissivity and reflected temperature.
0554 0872 
- Holster case : 0554 7808
- ISO calibration certificate, calibration points at 0 °C, +25 °C, +50 °C: 0520 0489
- ISO calibration certificate, calibration points at 0 °C, +100 °C, +200 °C: 0520 0490
- ISO calibration certificate, freely
selectable calibration points in the range -18 to +250 °C: 0520 0495