PNEUMATIC LEVEL CONTROLLER (Pneumatic Controller) works on the buoyancy principle. The force applied is proportional to the volume of liquid displaced. Change in the liquid level produces a change in the position of flex tube end. This causes movement of the flex tube shaft to which carrier assembly is connected. Carrier assembly opens or closes the nozzle to give pneumatic output from the pilot valve.

Pneumatic Level Controller consists of a displacer, mounted to the flex tube. The Pilot Valve and carrier assembly are housed in weather proof IP65 housing. The exhaust gas is vented inside the enclosure and then to the atmosphere through a vent hole. The instrument is known for its simplicity, reliability and ease of maintenance. Reverse action can be obtained Nozzle assembly by 180°.