Brenton Ward
The Testo 875i is the next step up from the entry level 875 model.* So what does the āiā stand for? No idea, but the most outstanding feature is much higher sensitivity than the standard 875 model.* A built in visual camera and a high speed 33Hz refresh rate is also included.
See the full review here….
https://infraredcameras.net.au/testo-875-1i/