The invention discloses a wide-range
hydraulic pressure type
sedimentation observation instrument based on a round elastic
metal membrane and relates to an earth
sedimentation observation instrument. The
sedimentation observation instrument is characterized in that a probe (30) is connected with a
water storage tank (10) through a flexible plastic
water pipe (20) and a flexible plastic air
pipe (60) and is connected with a
data acquisition instrument (50) through a
signal cable (40); the probe (30) comprises a cover plate (3A), a shell (3B), a water through hole (3C), a round elastic
metal membrane (3D), a displacement sensor (3E), an air through hole (3F) and a wire through hole (3G). By utilizing the round elastic
metal membrane with a novel structure as a key element, the sedimentation observation instrument has the characteristics of wide
linear measurement range, high measurement accuracy, long-term performance stability and the like; the sedimentation observation instrument can be used for carrying out multi-point settlement observation, and external common interference factors such as temperature and water
evaporation can be filtered by virtue of the differential performance of the sedimentation observation instrument, so that the observation accuracy is improved.