The altimeter on my airplane broke.

There are many 'keiri' (an alternative spelling for 'fu', a kind of bird) living in this lake.

I use a heart rate monitor during my daily exercise.

I use a pulse rate monitor to check my heart rate every day.

I measured yesterday's rainfall using a pluviometer.

I measured the wind speed using an anemometer.

We have made a new plan.

He looked at the speedometer and checked the speed of the car.

He measured the humidity using a psychrometer.

He is using an interferometer for a physics experiment.