What is this sensor
 

What is this sensor. Please help!
https://cimg4.ibsrv.net/gimg/www.che...a51ceead0.jpeg
https://cimg3.ibsrv.net/gimg/www.che...68748ee40.jpeg
https://cimg1.ibsrv.net/gimg/www.che...08bdc8d15.jpeg

Where did you remove it from and from what? If you don't add your year, model, engine and trans to your profile, you should put it in your post so we can narrow down the answer for you.

Off hand, it looks like a sending unit for oil, water, etc

My bad! Still trying to figure out this website. It’s a 1989 jeep Cherokee straight six manual transmission. It was pulled from the bottom of the engine.
https://cimg1.ibsrv.net/gimg/www.che...a63e425c5.jpeg
https://cimg3.ibsrv.net/gimg/www.che...140bfe4ac.jpeg

Im pretty sure thats gonna be a knock sensor

Yep, what Anthi said!!