Four gas detector receiving the float chamber (referred to the main body tube or casing), which form a flange or other communication via the interface and the container; this liquid chamber with the liquid surface within the vessel which is the same as height, so the cavity of the container with the liquid level float will lift and lift; carbon monoxide gas detector this time we can not see the level, so we installed a monitor outside the chamber turned column in as We in the manufacture of float in the float and sink into the liquid portion of the junction surfaced mounted magnet, combustible gas detector when it float with the lifting surface, it passes through a magnetic shell to turn the display column promoting magnetic flip turned column 180 °; due to magnetic turned column is red, white two semi-cylindrical composite cylinder, so after turning 180 ° turn toward the outside of the column will change the display color (red below the liquid level above white) , that is the junction of the two-color liquid height. In order to expand the scope of its use, can also increase the level transmitter device according to the relevant standards and requirements in order to output a variety of electrical signals. Where, 4 ~ 20mA current signal is more commonly used. For example: while monitoring the level of magnetic switch signal level can be used to control or alarm; On the basis of the level gauge turned column increased 4 ~ 20mA transmitter sensors, liquid level monitoring in the field, while the liquid position changes by transmission sensors, cables and instrumentation reached the control room, remote monitoring and control. http://www.dingdinggroup.com/