The utility model provides a
burette calibration device which comprises an iron stand, a lifting mechanism is arranged at the top of the iron stand, the lifting mechanism comprises a thread
bushing capable of moving up and down, and the top end of the thread
bushing is fixedly connected with an operation table; a
threaded rod is rotationally connected to the middle of the top wall of the operation table, a threaded block is in threaded connection with the outer portion of the
threaded rod, extending blocks are connected to the two sides of the threaded block, and a clamp is installed at one end of each extending block; and a plurality of mounting grooves are formed in the bottom of the iron stand. The
burette fixing device is reasonable in design, the overall height of the
burette fixing device can be adjusted through arrangement and cooperation of the threaded sleeve, the motor, the internal threaded column, the fixing rod, the connecting rod and the connecting rod, corresponding experimenters can operate the burette fixing device conveniently, the position of a burette can be further adjusted through cooperation of the
threaded rod, the threaded block, the extending block and the clamp, and the burette fixing device is convenient to use. Therefore, the visual line of the tester and the visual line of the experimenter are head-up, so that the experimenter can read the tester conveniently.