I. Overview: LWGY Series turbine flow sensor (hereinafter referred to as the sensor) is based on the torque balance principle, is speed-type flow meter. Sensor has a simple structure, lightweight, high precision, reproducibility is good, responsive, easy installation and maintenance, which is widely used in petroleum, chemical, metallurgy, water, paper, waste water plants, food, pharmaceutical and other industries is flow measurement and ideal energy meter. Sensor and display instrument used for measuring the closed pipe and stainless steel 1Cr18Ni9Ti, 2Cr13 and corundum Al2O3, carbide corrode, and no liquid fibers, particles and other impurities. If the display instrument with special features, can also be quantitative control, excessive alarm. Selection of the type of protection products (ExmT6), in potentially explosive environments. Sensor is adapted to the viscosity at the working temperature is less than 5 × 10-6m2 / s medium, the viscosity is greater than 5 × 10-6m2 / s of the liquid, to a solid solution after the sensor calibration used. If users need to use a special form of sensors can be negotiated order, take proof type sensors are described in the order. Two, LWGY basic type turbine flow sensor 1. Structure and working principle (1) structural features: a sensor for push-carbide bearing only, not only to ensure accuracy, improve wear resistance, and has a simple structure, strong and easy accessibility features. (2) Working principle: a fluid flow through the sensor housing, since the flow impeller blade with a certain angle, the blade having a fluid momentum rotational torque to overcome the friction torque and fluid resistance after the blade rotation, speed and stability in the torque balance, Under certain conditions, the velocity is proportional to the rotational speed, since the vane has magnetic permeability, it is a signal detector (composed of a permanent magnet and coil) of the magnetic field, the rotary blade cutting magnetic lines, periodically changing magnetic flux coil , so that the electrical pulse is induced across the coil signal, this signal is amplified shaping amplifier, formed with a certain level of successive rectangular pulse wave, can be remote to the display instrument, showing flow rate or total amount of fluid. In a certain flow range, instantaneous flow pulse frequency f and the fluid flowing through the sensor is proportional to Q, the flow equation is: where: f-- pulse frequency [Hz] k-- sensor meter factor [1 / m3] given by a single check. (Working condition) In terms of [1 / L] units Q-- instantaneous fluid flow rate [m3 / h] 3600-- conversion factor for each sensor meter factor by 迪川 factory fill in the verification certificate, k values set up the instrument in supporting the show, you can display the instantaneous flow rate and cumulative totals. Instrument Type: LWGYN basic LWGYA current output does not display type LWGYB battery-powered LWGYC output shows 24V supply (2) meter diameter: DN4-DN200 such DN25 Selection Code: 25 (3) Medium temperature: -20 ~ + 120 ℃. (4) Ambient temperature: -20 ~ + 55 ℃ (5) Power supply: Voltage: 12V ± 10%, current: ≤10mA (6) output voltage amplitude: High ≥8V, low ≤0.8V (7) Transmission distance: distance from the sensor to the display instrument up to 1000m LWGB / LWGQ insertion turbine flow meter 2. Basic parameters and technical performance LWS food sanitary clamp type turbine flowmeter (1) Basic parameters: Table a LWGY □ □ □ □ said Ming Dichuan LWGYN basic instrument type, + 12V power supply, pulse output, high ≥8V low level ≤0.8V LWGYA 4 ~ 20mA two-wire current output, remote Bian send type LWGYB battery-powered site display type LWGYC site display / 4 ~ 20mA two-wire current output LWY nominal size 4 4mm, ordinary turbine flow range 0.04 ~ 0.25m3 / h for a wide range of turbo 0.04 ~ 0.4m3 / h 6 6mm, ordinary turbine flow range 0.1 ~ 0.6m3 / h for a wide range of turbo 0.06 ~ 0.6m3 / h 10 10mm, ordinary turbine flow range of 0.2 ~ 1.2m3 / h wide range of turbine is 0.15 ~ 1.5m3 / h 15 15mm, ordinary turbine flow range 0.6 ~ 6m3 / h for a wide range of turbo 0.4 ~ 8m3 / h 25 25mm, ordinary turbine flow range 1 ~ 10m3 / h turbine wide range 0.5 to 10m3 / h 40 40mm, ordinary turbine flow range 2 ~ 20m3 / h for a wide range of turbine 1 ~ 20m3 / h 50 50mm, ordinary turbine flow range of 4 ~ 40m3 / h for a wide range of turbine 2 ~ 40m3 / h 80 80mm, ordinary turbine Flow range 10 ~ 100m3 / h for a wide range of turbo 5 ~ 100m3 / h 100 100mm, general turbine flow range 20 ~ 200m3 / h for a wide range of turbine 10 ~ 200m3 / h 150 150mm, general turbine flow range 30 ~ 300m3 / h Wide scale turbine is 15 ~ 300m3 / h 200 200mm, general turbine flow range 80 ~ 800m3 / h for a wide range of turbine 40 ~ 800m3 / h explosion unmarked, non-explosion-proof type B Accuracy class A Accuracy 0.5 Accuracy 1 B A wide-range turbo turbine type B common turbine DN4-DN40 diameter sensor is threaded connection, the maximum working pressure of 6.3Mpa; DN50-DN200 diameter sensor flange connection, the maximum working pressure of 2.5Mpa; DN4-DN10 diameter sensor with a straight pipe before and after the filter. DN15 caliber than before I can complete sensor straight pipe.