olemus
kontekstist sõltuva otstarbega järjestusvahend

Wiktionary:
1. any device that activates or deactivates the components of a machine or system according to a preplanned sequence (as in a washing machine, or central heating system)

näiteid
https://en.wikipedia.org/wiki/Cam_timer

vt ka
- jada
- sekventser (1)