Environment monitor

The utility model relates to the technical field of environment monitors, in particular to an environment monitor which comprises a supporting column, an external installation unit and a monitoring unit, the monitoring unit is used for being installed on the external installation unit, an installation groove is formed in the outer surface of the supporting column, and the environment monitor further comprises a clamping installation unit. The clamping unit comprises a screw rod rotationally mounted in the mounting groove, a threaded block in threaded connection to the screw rod, a sliding block fixedly connected to one side of the threaded block, and a positioning clamping rod fixedly connected to the other side of the threaded block; when dismounting is needed, the screw rod is rotated reversely, so that the threaded block, the sliding block and the positioning clamping rod are far away from the positioning plate, position limitation of the positioning clamping rod on the positioning plate is relieved, and t