Metal tube float flowmeter is commonly used in industrial automation and process control of a flow measuring instruments, it has a small pressure loss, detection range (turndown ratio 10:1), easy to use features, it can be used to measure liquids, gases and steam traffic, especially suitable for low flow rate and traffic rate of flow measurement. 
 Metal tube rotameter, place the display type and smart remote transmission type, with a pointer to show instantaneous flow, cumulative flow, liquid crystal display, upper and lower alarm output and accumulated pulse output, the standard two-wire 4-20mA current output and many other forms provide users with a very wide choice. In addition, the instrument uses a high quality MCU micro-processing system to ensure the excellent performance of the flowmeter in a variety of application spaces. 
 Metal tube flowmeter, the excellent performance and reliability, as well as a better cost performance over the years a wide range by the favor of the petrochemical, steel, electricity, metallurgy, light industry and other industries. 
 Second, the structural principle 
 1, the structure 
 Metal tube float flowmeter is mainly composed of three parts 
 indicator (Intelligent indicators, local indicators) 
 b, float 
 c, cone-shaped measuring chamber 
 2 works 
 The measured upper and lower ends of the bottom-up media through conical measuring tube float differential pressure in rising to power, greater than immersed in the fluid to float the weight of the float will rise when the float suffered rising force, the annulus area of increases, the annulus at the velocity of the fluid immediately drop the float up and down the side differential pressure decreased, the upward force acting on the float, along with reducing, until the upward force is equal to the float weight immersed in the fluid, the float has stabilized at a certain altitude. The float position of the level that corresponds to the size of the measured medium flows. Float built-in magnet in the float moves up and down with the media, the magnetic field changes with the movement of the float. 
 a place type, place indicator in the rotating magnet in the float magnet coupling, rotate at the same time promote the pointer to indicate at this time the size of the flow through the dial. 
 intelligent, by a solid-state magnetic sensors intelligent indicator of changes in the magnetic field into electrical signals by A / D transformation, microprocessor, D / A output, LCD display, to show the flow size and accumulated traffic. 
 Third, the main features of 
 1 is suitable for small diameter and low flow rates 
 2 reliable, less maintenance, long life 
 For the downstream straight pipe sections do not ask 
 (4) the degree of a wide flow range 10:1 
 Place pointer indicates close to a linear 
 Intelligent indicator with LCD display, can display the instantaneous and cumulative flow, but also the output pulse, the output alarm 
 7 with temperature compensation 
 8-place type, FET type, folder size, explosion, corrosion and other forms of 
 Fourth, the technical parameters 
 A measuring range: Water 2.5 100000l / h (20 ° C) 
 2, the turndown ratio: 10:1 
 Accuracy class: 1.0,1.5,2.5 
 4, the working pressure: DN15, DN25, DN50 the PN4.0MPa maximum of 10.0MPa, DN80, DN100 for PN1.6MPa for 6.4MPa 
 5, the medium temperature: -40 ℃ to 300 ℃ 
 6, the medium viscosity: DN15: of η <5mPa? S (F15.1-F15.3) 
 η <30mPa? s (F15.4 ~ F15.8) 
 DN25: η <250mPa? S 
 DN50 ~ DN150: η <300mPa? S 
 Ambient temperature: LCD type: -40 ℃ to 85 ℃ 
 Pointer type: -40 ℃ to 120 ℃ 
 8 Connection: flange (the implementation of standards DIN2501 flange standard manufacturing or user) 
 9 meter height: 250mm 
 10, the cable interface: M20 * 1.5 
 11, power supply: 24VDC two-wire 4 ~ 20mA or 85 ~~ 265VAC 50/60Hz (Far EasTone type) 
 12, the alarm output: upper or lower limit of the instantaneous flow alarm relay output (contact capacity 5A @ 250VAC) or open-collector output (max 100mA @ 30VDC internal impedance 100Ω) 
 13, pulse output: accumulated pulse output, minimum interval of one pulse every 10 seconds (AC type) or every 50 ms pulse. 
 14, LCD: double LCD display the instantaneous flow and accumulated flow. 
 15, the security proof: Exia II CT4 
 16, the measuring tube material: 316 stainless steel (type) or lined with polytetrafluoroethylene (anticorrosive)