The VMI series of flow meter is an excellent way to measure flow in big diameter pipes with a low cost. The size of the pipe could be from DN150 to DN2000. It is normally utilized in water impound, drink water distribution, sewage, electric power plant and so on.
 
Depends on the condition of the pipe the VMI sensor can be installed without process shutdown. To remove the sensor to install at another location or for maintenance purpose it also no need to stop the process installation or removal can be done without line depressurization.
 
Two version of VMI installation are offered -- one is fixed style and the other is adjustable. The fixed is mounted to the line by mean of flange connection and the adjustable is mounted to the pipe utilizing a valve, depending of the size of pipe the insertion length is changed, normally it is mounted at 1/8 of internal diameter of the pipe. There are three standard sensor lengths to support from DN150 to DN2000 pipes. 
 
Technical Features:
 
Pipe diameter: from DN150 to DN2000
Velocity range: 0.3 to 6.0 m/sec
Conductivity:  bigger than 50 μS/cm
Flow direction:  direct and reverse
Operating temperature: -30 to 90ºC
Operating pressure: 20 bar maximum
Electric connection:  ½"NPT thread or ½" cable gland
Process connection:  thread BSP or others
Power consumption:  5 W
Accuracy:   ±1% of reading
Enclosure:  IP67;IP68, diecast aluminum
Rod material:  304 or 316 stainless steel
Electrodes: stainless steel 316L
Converter mounting type:  remote CEV2000  compact with local PRO1000
Installation Environment: Installation and removal with pressurized line