Tools scientist use

The list is so exhaustive that I'm not even going to try, but I'll tell you about the tools/equipment I use.

I study geophysics, and often have to collect data to try and understand the structure of the Earth. I use magnometers to measure the magnetic field strength, gravimeters to measure the gravitational field strength, terrameters (and occasionally something called an EM34) to measure the resistivity of the immediate subsurface, and a seismometer with an array of geophones to detect irregularities (such as geological changes) using seismic waves.