discriminator

noun6

1. •
   A person who discriminates.
2. •
   A test or variable, etc. that serves to distinguish between different things.

   • Colour is not an effective discriminator when it comes to the spiciness of food.
3. •
   A feature of the seller's offering that differs from a competitor's offering and is important to the buyer in question.

   • An especially strong warranty can be a discriminator in some marketplaces.
4. •
   A person who acts unfairly through prejudice.

   • I am not a discriminator
5. •
   Any of several electronic devices that convert some property of a signal into an amplitude whose value is proportional to the difference between the value of the input signal and that of a standard.
6. •
   A person who differentiates things or concepts.