YSZK-01L-C-E pressure type liquid level sensor, voltage: DC24V output: 4-
20mA, standard thread interface: M20*1.5mm, without thread, or non-standard 
thread, can be customized. The pressure can be made according to user requirements, 1 
meter water column height, 2 meters water column height, 3 meters water column height 
-20 meters water column height, the length of the cable line is made according to 
customer requirements。