Air type liquid level switch

The utility model belongs to the technical field of mechanical equipment, and provides an air-type liquid level switch, which comprises a shell, a first liquid level switch and a second liquid level switch, the upper end of the air pipe is communicated with the first through hole; the diaphragm is arranged in the shell, is positioned at the bottom of the shell and is used for sealing the first through hole; the microswitch is arranged in the shell and comprises a driving rod and an output end, the driving rod of the microswitch is located above the diaphragm, and the output end of the microswitch is used for being connected with a controller. By means of the technical scheme, the problem that in the prior art, a liquid level switch is unreliable in viscous liquid level detection is solved. 本实用新型属于机械设备技术领域，提出了空气式液位开关，包括：壳体，壳体底部设置有第一通孔；气管，上端与第一通孔连通，下端开口；膜片，设置在壳体内，且位于壳体底部，用于将第一通孔密封；微动开关，设置在壳体内部，微动开关包括驱动杆和输出端，微动开关的驱动杆位于膜片的上方，微动开关的输出端用于与控制器连接。通过上述技术方案，解决了现有技术中液位开关对粘稠性液体液位检测不可靠的问题。