Liquid level off-line detection device

The utility model relates to the technical field of liquid level detection, in particular to a liquid level off-line detection device which comprises a piston pipe, a sliding block arranged in the piston pipe in a sliding mode, a transition connector with the interior of a hollow structure and a contact type alarm installed on the side face of the piston pipe. The other end of the connecting rod penetrates through a second connecting opening formed in the upper end of a piston pipe and then is connected with a pressing block, the lower end of the piston pipe is connected with a first connecting opening formed in a transition connector, and the side face of the transition connector is in threaded connection with a threaded pipe connected with an oil tank. The distance between the pressing block and the contact type alarm is visually measured, and the pressing block makes contact with the contact type alarm to give an alarm, so that liquid level detection is carried out. 本实用新型涉及液位检测技术领域，尤其是一种液位离线检测装置，包括活塞管、在活塞管