●Detailed introduction
◆Proprietary flow data model algorithm; fuzzy theory control temperature and humidity algorithm; ◆High-performance intelligent microprocessor and analog-to-digital, digital-to-analog conversion chip; ◆Wide range ratio 1000:1; large diameter, low flow rate, negligible pressure loss; ◆Measure mass flow directly without temperature and pressure compensation; ◆Low flow rate measurement is very sensitive; ◆Easy to design and select, easy to install and use; ◆Suitable for all kinds of single or mixed gas flow measurement. ●Application ■Utilities---Monitoring of electricity, gas and water treatment Pipeline gas; general systems; biogas; coal gas; natural gas; liquefied gas; boiler preheating air ■Oil and gas industry Energy exchange; Well filling gas recovery; Gas metering; Gas quality analysis; Leakage gas testing; Natural gas measurement; Flare gas monitoring ■Power industry Gas measurement in the process of gas distribution in the fuel system; measurement of various gases in boilers and auxiliary systems; gas measurement in gas furnaces; hydrogen measurement; measurement of primary air and secondary air in blast furnaces in power plants ■Chemical industry Flue gas circulation monitoring; gas flow measurement in sampling system; gas flow measurement of induced draft fan; ammonia gas measurement in fertilizer plant; various gas flow measurement in battery factory ■Metallurgy industry Gas measurement in iron and steel plants; measurement of blast furnace gas in ironworks; measurement of coke oven gas in coking plants; measurement and control of heating furnace gas (blast furnace gas, coking gas, natural gas, etc.) in rolling mills; hydrogen, oxygen, Control of gases such as nitrogen ■Pulp and paper industry Gas measurement in wastewater treatment systems; flue flow monitoring; boiler recovery of secondary/tertiary air; boiler gas and air supply measurement ■Food and pharmaceutical industry Fresh air addition in processing operations; carbon dioxide treatment in breweries; hot air flow in bottle sterilizers; gas flow measurement during thermal oxidation; ventilation systems; boiler air intake, exhaust gas, process control ■Environmental protection Gas measurement in the process of biogas utilization; chlorine gas measurement in the chlorine gas treatment process; gas measurement in the aeration tank in the sewage treatment process; chimney flue exhaust monitoring SO2 and NOX emissions ■Other industries Factory compressed air measurement; pulverized coal combustion process powder/gas ratio control fuel; cement industry vertical mill discharge hot gas flow control ●Working principle ■HDRSL series flow meter/flow switch is a flow meter based on the principle of thermal diffusion. That is, when the fluid flows through the heating object, the heat dissipation of the heating object is proportional to the flow rate of the fluid. Specifically, the sensor of the flowmeter has two standard RTDs, one is used as a heat source and the other is used to measure the fluid temperature. When the fluid flows, the temperature difference between the two is nonlinear with the flow rate. relationship, the instrument can convert this relationship into a linear output of the measured flow signal. ■There are two design methods for the flow meter manufactured by the principle of thermal diffusion: one is based on the principle of constant temperature difference; the other is based on the principle of constant power. Based on a common data model: P/△T=A+B(Q)N. Among them: P---dissipated power, △T---temperature difference between two sensors, Q---mass flow rate, N---exponential coefficient, A and B are coefficients related to the thermal properties of the gas. ■The principle of constant temperature difference: △T remains unchanged, and the dissipated power P and the flow rate Q of the fluid increase exponentially. ■Constant power principle: the dissipated power remains unchanged, and the temperature difference ΔT and the fluid flow Q are exponentially decreasing.
Features: • Using patented platinum RTD sensor with extremely high stability • Adopt proprietary technology "balanced structure package", medium temperature self-compensation • Proprietary algorithm for high linearity, high repeatability, and high precision • The range ratio is 1000:1, which can be expanded according to user requirements • It can realize the measurement of large diameter and small flow, the minimum flow can be measured as low as zero, and the resolution is 0.001m/s • No moving parts, negligible vibration effects • Straight pipe section requirements are not high 1-2D • Independent of the temperature and pressure of the medium • Proprietary high temperature algorithm, the medium temperature can reach +510℃, • High-humidity algorithm for high-precision measurement • Input 12-point dynamic correction for flow signal, built-in 10-point correction • On-line dynamic correction current/voltage output • Insensitive to small particles such as dust • Online continuous flow loading and unloading, easy maintenance ●Performance index • Measuring range: 0—120Nm/s (20℃, 101.33KPa) • Accuracy: ±1% of reading ±0.5% of full scale • Turndown ratio: typically 100:1 (depending on the range of the calibrated flow) • Pipe diameter range: 10mm～6000mm • Application range: suitable for all kinds of single or mixed gas. Dust, sand, moisture, various corrosive gases • Ambient temperature range: -40℃～+85℃(without display); -30℃～+70℃(with display); humidity less than 90%RH • Medium temperature range: -40℃～+100℃; -40℃～+200℃; -40℃～+450℃; -40℃～+510℃ • Sensor diameter: ф3, ф2.5 • Insertion sensor probe rod diameter: ф19 (standard), ф16, ф12 • Sensor Material: 316 Stainless Steel, Hastelloy, Titanium • Probe material (protective cover): 316 stainless steel (standard), Hastelloy • Bidirectional measurement of media flow • Analog output: flow: 4-20mADC, temperature: 4-20mADC, maximum load: 1000Ω • Cumulative pulse output • Type 12 non-linear correction, built-in 10 non-linear correction • Communication: Serial output RS232/RS485 • Power supply: 24VDC/600mA; 220VAC/2W; 110VAC/3W • Alarm: 1-2 relay output, 5A/220V, 5A/30VDC, key-in setting?? • Large-screen LCD display: seven instantaneous flow, eight cumulative flow • Process pressure: 1.6Mpa (maximum 20MPa) • Installation process form: plug-in type (card sleeve, card sleeve + ball valve, flange connection), pipeline type (flange, threaded connection) • Explosion-proof grade: intrinsically safe (iaⅡCT5), flameproof (ExdⅡCT4) • Protection class: IP65
