measurement tool
tool (material or immaterial) used to generate a measurement
anemoscope
device invented to show the direction of the wind
eye chart
chart used to measure vision
measurement scale
graduated measurement scheme developed for a phenomenon
benchmark
test to measure the performance of a computer system or component
angle of attack probe
aircraft component
Google Trends
public outlet of Google that shows how often a particular search-term is entered relative to the total search-volume
measuring instrument
device for measuring a physical quantity
stream gauge
device used to monitor surface water flow
Snellen chart
eye chart used to measure visual acuity
feeler gauge
tool used to measure gap widths