HELICAL ROTOR TYPE FLOW METERS for impure & viscous liquids. NK Instruments have Helical shaped Rotor type Flow Meters, which are best suitable for liquid containing soft suspended particles, or it is clear but very viscous in nature. All contact parts in Helical Flow Meter are SS304 or SS316 with Hard Carbide bearings. We offer Helical Flow Sensors with Pulse output, Helical Flow Meters with 4 to 20 mA output, Helical Flow Meter with 4 to 20 mA & RS485 communication port and we also have Flameproof Helical Rotor Flow Meters in our range. We have Helical Flow Meters in various sizes from 1/2" up to 6". We have Threaded end type Helical Flow Meters, TC end type Helical Flow Meters and Flange End Helical Flow Meters in our range. # SS Helical Rotor Flow Meters # Threaded end type Helical Flow Meters # TC end type Helical Flow Meters # Flange End Helical Flow Meters # Flow Meter for impure liquids # Flow Meter for viscous media # Oval Gear Flow Meters # Helical type Flow Meter with 4 to 20 mA output # Helical Flow Meter with Transmitter # Helical Flow Meter with RS485 # Flameproof Helical Rotor Flow Meter # Explosionproof Helical Rotor Flow Meters # Helical Rotor Flow Sensors