Flowstar Instruments Pvt. Ltd. Offers Magnetic Level Indicator. Flowstar Instruments Pvt. Ltd. Has been awarded ISO 9001:2000 certifications. Magnetic Level Indicator is used to measure levels of corrosive acids, toxic liquids, solvents, vegetable oils, fuel oils and liquid gases. Magnetic Level Indicator is a float of compatible MOC, carrying a magnet, which is immersed in the liquid and moves due to buoyancy. The movement of this indicator is conditioned within a SS float chamber.