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product description of flow meter KF800 series metallic rotameter is one of variable-area flowmeter with simple structure,work reliable,wide application field,high precision,convenient installing,it is suitable for compatible liquids,gases. KF800DX series metallic rotameter with LCD and 4-20mA electricity signal output,restrict alarm and many kinds of signal,compared with other flowmeters,this series has the characteristics of high-pressureproof,high-temperature proof,safety,ocular reading etc,it is suitable for chemical industry,petroleum,metallurgy,power plant,environmental protection,medical science. principle structure As the fluid flow upward in the tube,the float moves upward to a certain position where the lifting force and the gravitational force are balanced,at the moment,the circulation are between the float and the orifice is kept fixed.the circulation area is proportional to the height of the float,it means the height of the float represent the volumetric flowrate.when the float moves up and down ,it transmits its positional to the indicator outside in form of magnetic-coupling,so make the needle of the indicator follows the movement of the float,and by using the cam board to show the value of flowrate linearly on the indicator. indicator porameter SpecificationDN (mm)Measure RangePressure Loss(Kpa)Water(L/h)Air(Nm3/h)Orifice PlateCone PipeNormal TypeCorrosion-proof typeWaterAirAir152.5-250.07-0.75.57.12.64.0-402.5-250.11-1.15.57.22.66.3-634.0-400.18-1.85.57.32.610-1006.3-630.28-2.85.67.52.616-16010-1000.48-4.85.68.02.625-25016-1600.7-7.05.810.82.640-40025-2501.0-10.06.110.02.863-63040-4001.6-16.07.314.03.22563-63040-4001.6-165.77.23.2100-100063-6303-305.97.73.3160-1600100-10004.5-456.08.83.4250-2500160-16007-706.812.03.8400-4000250-250011-1109.219.04.550630-6300400-400018-1806.88.67.41000-10000630-630025-2509.410.47.71600-160001000-1000040-40014.515.58.4802500-250001600-1600070-7006.912.96.84000-400002500-25000100-10008.018.58.91006300-630004000-40000160-16008.519.212.08000-800006300-63000250-25008.819.612.8Indication porameter1.LCD indicator:intantaneous delivery number range:0-60000integrated flow number range:0-9999999*52.indicator convert accuracy:instantaneous value:0.5%FS±1msdaccumulated value:0.5%FS±1msd3.LCD environment temperature:-10+854.datas protect time:10 years if cut off the power supply5.Power supply:tow-wire channel 12VDC-36VDC6.Alarm switch:Solid-state relay,electric current 200mA,voltage 50V7.Explosin-proof mark: Intrinsically safe type:laIICT5 Flameproof endosure: DII BT48.Cable API:M20*1.59.KF800 needle indication10.KF800D 4-20mA11.KF800DX 4-20mA with LCD display