You need much more information to identify an insect.
Insect sensors are called Antennae.
Insects only have one pair of antennae. Insect's antennae are their primary olfactory sensors. Crustaceans have an anterior pair of antennae. This second set of antennae are used to detect odors.
Antennae.
An insect with long antennae and six legs is typically a type of beetle or grasshopper.
Antennae.
so it knows of it bumps in to anything.
Centipede
No, not all insects have antennae. Some insect species have reduced or no antennae at all.
Rove beetles are one example of an insect that has hard feelers or antennae. The Rove beetle's antennae are encased in tough cuticle or exoskeletal armor.
I am an INSECT.
Two antannae
It helps the insect to sense and smell.