Ultra-high precision 2-axis MEMS driven digital inclinometer / tiltmeter is available for speedy angle measurement applications and surface profiling require very high resolution and accuracy of one arc second.
12.
The graph shows this repeated action, with a pattern of swelling of the main chamber ( recorded by the tiltmeter ), draining of that chamber, and then an eruption of the adjoining vent.
13.
Working together, the Mexican and U . S . scientists set up a device called a tiltmeter to detect infinitesimal shifts in the slope of the volcano, which becomes swollen when magma rises into it.
14.
The one at Popocatepetl is so sensitive that if you had a 3, 000-foot bar of steel, and slipped a nickel under one end, the tiltmeter at the other end would detect it.
15.
Shortly before the end of the eruption, a tiltmeter 1150 metres ( 3750 ft ) from the crater which had been measuring ground deformation throughout the eruption detected subsidence towards the crater, implying that the shallow magma chamber which had fed the eruption was emptying out.
16.
A second type of inverted pendulum is a tiltmeter for tall structures, which consists of a wire anchored to the bottom of the foundation and attached to a float in a pool of oil at the top of the structure that has devices for measuring movement of the neutral position of the float away from its original position.
