Source: Handheld Sensor Gizmo (by Ville Seppänen - ArtStation)
For measuring things that can be measured. Personal project somewhat inspired by Star Trek TNG's tricorder.
ArtStation profile: https://www.artstation.com/accuman
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It has a very TNG Tricorder feel to it. I love it.
It would actually make sense in-universe somewhere 5 to 10 years before TNG.