https://www.myfonts.com/fonts/facetype/ocr-t/

Being a geometric sanserif ocr-t comes in eleven weights from ultrawhite to infrablack (brightwhite, white, silver, lightgrey, grey, darkgrey, anthracite, black, jetblack). With more than 600 glyphs it covers all your typographic needs and manages to stay at the same place no matter which width you’re using. Its readability and legibility is more than fine although it needs no kerning.

The infrablack is really black, in order to achieve this, the form of letters change from darkgrey to anthracite from upright to some kind of upright italic. This also gives opportunity to mix two weights with same colour but different architecture. Find also stylistic sets, alternate letters, lots of bullets, different arrows, hands and well: kind of hearts.