For sale: Flow Mon FML.90.AL.LP.3EE.220 flow indicator. A gas or fluid flow indicator is a device that measures the amount of a gas or liquid passing through a system over a specified period of time. This type of device is used in various industrial processes and applications to monitor and control the flow rate of gases or fluids. The operation of a Flow Mon FML.90.AL.LP.3EE.220 flow indicator depends on the type of device used. There are several types of flow indicators, the most common of which are: 1. Measured flow indicator: This type of flow indicator uses a measuring tube or orifice to measure the flow rate of gases or fluids. The device is equipped with a sensor that measures the pressure difference between the inlet and outlet of the measuring tube or orifice and calculates the flow rate. 2. Turbine Flow Meter: This type of flow meter uses a turbine that rotates proportionally to the flow velocity of gases or fluids. A sensor records the number of rotations of the turbine and calculates the amount of gas or fluids passing through the device. 3. Ultrasonic Flow Meter: This type of flow meter uses high-frequency sound waves to measure the flow velocity of gases or fluids. The sound waves are emitted through the gas or fluid and reflect off the inner surface of the measuring tube. A sensor records the time it takes for the waves to reflect and calculates the flow velocity. In general, gas or fluid flow meters provide essential information about the flow of material within a system and allow the industrial process to be monitored and regulated efficiently. It is important to select the type of flow meter that best suits the properties of the system