Key facts
- Brand
- testo
- Model
- 870
- Category
- Other Electronics
- Industry
- Industrial
- Documents
- 3
- Languages
- ZH · EN
- Last added
- 2026-10-31
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testo 870 Thermal Imager User Manual
The testo 870 is a portable and durable thermal imager designed for non-contact surface temperature measurement and distribution display. It is suitable for applications in building inspection, production monitoring, and preventive maintenance. The device features an infrared resolution of 160 x 120 pixels and a spectral range of 7.5 - 14 µm. This manual is written in Chinese.
Read onlineTesto 870 specifications
| Infrared Resolution | 160 x 120 pixels (FPA, amorphous silicon) |
|---|---|
| Thermal Sensitivity (NETD) | <100 mK @ 30 °C |
| Field of View (FOV) | 34° x 26° |
| Spectral Range | 7.5 - 14 µm |
| Display | 8.9 cm (3.5") TFT, QVGA (320 x 240 pixels) |
| Battery Type | Lithium-ion rechargeable battery 2500 mAh / 3.7 V |
| Operating Temperature | -15 - 50 °C |
| Weight | 550 g (with battery) |
All Testo 870 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the minimum focusing distance?
The minimum focusing distance is less than 0.5 meters.
How long does it take to fully charge the battery?
If the battery is fully discharged, it takes approximately 5 hours to charge fully.
What is the warm-up period for the camera?
The camera is still in its warm-up period which takes approximately 90 seconds.
What does the tilde (~) symbol indicate on the display?
It indicates that the value is outside the measuring range and the extended display range with no guarantee of accuracy.
What is the infrared resolution of the testo 870?
The native infrared resolution is 160 × 120 px, and SuperResolution technology can increase it to 320 × 240 px.
How long does the battery last during operation?
The built‑in Li‑ion battery provides up to 4 hours of operating time.