The utility model discloses a glass measuring vessel liquid level automatic constant volume device, including needle control module, clamping module,
visual control module, pump liquid module,
liquid storage tank and controller. Needle control module includes the thick needle and thin needle of switchable position, pump liquid module and
liquid storage tank between the pipeline connection, needle control module and pump liquid module between the pipeline connection, and pump liquid module draws liquid from the
liquid storage tank and injects into needle control module, needle control module,
visual control module, pump liquid module are electrically connected with controller, and the needle of needle control module is lifted and switched through the controller control, and the pump liquid module is controlled to inject liquid to needle control module through the controller, and the
visual control module is controlled to
shoot liquid level and
handle imaging through the controller. The device uses the double needle design of thick needle and thin needle, and the thick needle realizes rapid
liquid injection, and the thin needle realizes accurate constant volume liquid surface, reaches the uniform speed
microinjection under the liquid, real -time detection liquid level continuous change, realizes the capacity accurate constant volume.