Answer: aneroids

AnswerCrossword Clue
ANEROIDSBarometers.
ANEROIDSSome barometers
aneroidsusing no fluid
aneroidsANEROID, a type of barometer
aneroidsdevice for measuring atmospheric pressure, often specially calibrated for use as an altimeter, consisting of a box or chamber partially exhausted of air, having an elastic top and a pointer to indicate the degree of compression of the top caused by the ex