Question

name the device in which falling sand is used as timing​

Answer 1

explanation:

$Hourglass\:or\:sandglass$

is the device in which falling sand is used as timing.​

Answer 2

ANSWER:

The sand glass is the device which is used as timing object based on sand movement from top to down in glass.

EXPLANATION:

The usual form it consist of 'two cone shaped' or 'oval' shaped receptacles joined by narrow neck.

The sand or liquid is the upper most portion or section of the hour glass. This is run though the neck in to the lower section in exactly an hour basis. Liutprand was first to discover this glass.