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CKAS-FLRS880 thermal gas mass flowmeter


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Using the best products is a necessary guarantee for effective control of the production process.CKAS is a promoter of the application of thermal mass flowmeters in the industrial field. It is constantly committed to applying the latest technology to products, and has developed optimized products with better performance, providing users with accurate and reliable thermal mass flowmeters at reasonable prices. Type mass flow meter, to provide users with the best service.

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Product Description

Features

Industry application

Dimensions and structure diagram (unit: mm)

Product Description

Using the best products is a necessary guarantee for effective control of the production process.CKAS is a promoter of the application of thermal mass flowmeters in the industrial field. It is constantly committed to applying the latest technology to products, and has developed optimized products with better performance, providing users with accurate and reliable thermal mass flowmeters at reasonable prices. Type mass flow meter, to provide users with the best service.

Features

There is no need for temperature and pressure compensation for gas flow measurement, the measurement is convenient and accurate, and the mass flow or standard volume flow of gas can be obtained.

Wide range ratio, up to 100:1 or more, can be used for gas leak detection, especially in the measurement of large pipe diameter, low flow rate, large flow range and ultra-small flow.

The shock resistance is good, and the measurement accuracy is not affected by vibration.

Long service life, the sensor has no moving parts and pressure sensing parts, simple installation and maintenance.

Fast response, small pressure loss, good repeatability

Digital design, overall digital circuit measurement, LCO display intuitive and clear, accurate measurement.

Equipped with RS485 communication module or HART protocol, it can realize centralized management with the help of microcomputer

working principle

thermal diffusion technology

The sensing element of thermal diffusion technology adopted by CKAS thermal gas mass flowmeter includes two resistance temperature sensors (RTD) with thermowell protection. When measuring gas, one resistance temperature sensor (RTD) is heated, and the other resistance Type temperature sensors (reference RTDs) are used to measure the gas temperature.

When the sensor is placed in the medium without flow, a temperature difference (AT) will be formed between the two (RTD) due to the effect of the heater.As the flow of the medium is based on the principle of heat conduction, the molecules of the medium will take away part of the heat on the heating RTD), while the temperature of the reference RTD will remain unchanged.The power (P), temperature difference (AT) and gas mass flow rate (Q) of the heating temperature sensor have the following functional relationship:

Based on the above functional relationship, it can be divided into temperature detection method and power measurement detection method according to different detection variables.The former refers to the power (P) of the constant heating temperature sensor to provide heat and measure the temperature difference (AT) that changes with the flow rate, also known as the constant power method. The latter refers to maintaining the temperature difference between the heating element and the measured fluid (AT) Constant, control and measure the power (P) of the heating temperature sensor, and the power consumption increases with the increase of the flow rate, which is called the constant temperature difference method.

The thermal gas mass flowmeter is an instrument that uses the heat transfer principle, that is, the heat exchange relationship between the flowing fluid and the heat source to measure the gas mass flow.According to the heat effect of gas on the heat source of the detection element, it can be divided into heat distribution effect and heat dissipation effect.The thermal gas mass flowmeter using the heat dissipation effect (King's law), as a direct mass flowmeter for measuring gas mass flow, has low pressure loss, large flow range, high precision and high repeatability, and no movement. Significant advantages such as components have been greatly developed and won favor in the industrial process control of many industries at home and abroad.

constant temperature difference method

The constant temperature difference method uses a Wheatstone bridge feedback circuit to control the power of the heating temperature sensor to keep the temperature difference between the heating temperature sensor and the reference temperature sensor constant.The heating power increases as the flow rate increases, but the range ratio is restricted by the influence of the circuit itself and the maximum heating current of the resistor. The constant temperature difference ignores the temperature change of the gas medium. When the medium temperature changes greatly, the heat flow rate of the gas Variations in coefficients and equilibrium constants are prone to errors.

constant temperature difference method

Response time

The response time of the constant temperature difference method (CTA) and the constant power method (CPA) is completely different, as shown in the figure below, the response time of (CPA) depends on the reaction time for the fluid to take away the heat to its true value, while (CTA) It is different, the change caused by the two probes based on the constant temperature difference when the fluid changes requires the calculation program to make a fast response immediately.It also provides (CTA) response time.

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productfeatures

applicationindustry

Industry application

The measurement of air and compressed air is the largest gas market, most of the applications are low temperature (+15°C-+50°) and low pressure (0~1) MPa, no need for advanced professional technology and special solutions .

If natural gas and other gases such as nitrogen, oxygen, hydrogen and air are added together, it will account for more than 80% of the gas measurement.

main application

typical application

Compressed air flow measurement

A modern air compressor converts 90 percent of electrical energy into heat and only 10 percent into compressed air, which also makes compressed air ten times more expensive than electricity.By measuring the flow rate of compressed air, the operating efficiency of the system can be provided.Only by detecting the gas flow distribution of each process pipeline can we better reduce energy consumption and cost.

·Measuring the mass flow rate directly, wide range ratio.

·Measurement is more accurate

·Sensitive for low flow rate.

Compressed air flow measurement

Boiler Firing/Natural Gas Flow

Effectively measure the flow and cumulative value of fuel gas entering boilers, heaters or other furnaces, and send these data values to the DCS system, not only to correct the flow of natural gas, but also to calculate their internal distribution and thermal emissivity, etc.

The CKAS-FLRS880 series achieves optimized combustion and reduces the emission of polluting gases through precise measurement and control.

Directly measure the mass flow rate,

Wide range ratio, more accurate measurement,

·Sensitive for low flow rate.

boiler combustion natural gas flow

Biogas/fermentation gas measurement

Biogas and waste gas in fermentation vessels are a saturated mixture of methane and carbon dioxide. Due to the low flow rate and pressure, it is usually difficult to measure its flow rate with other flow meters.The thermal gas mass flowmeter is the use of its most excellent low flow rate

Sensitive characteristics, become the best choice for measuring this kind of gas

· Low flow rate sensitive;

· High reliability.

Biogas Fermentation Gas Measurement

Square pipe or other special-shaped pipe gas flow measurement

Because of its plug-in structure, CKAS-FLRS880 series can be easily installed on square or other special-shaped pipes to measure the gas flow in the pipe by setting the type and cross-sectional area of the pipe in the menu.

Plug-in structure, easy to install;

The menu can set the pipe type, which is convenient for metering.

Square pipe or other special-shaped pipe gas flow measurement

Sewage treatment aeration measurement

The power consumption of the blower aeration system in the sewage treatment plant generally accounts for more than 50% of the power consumption of the whole plant, which is the key to energy saving of the whole plant, and the air volume control of each pipeline is the most significant energy-saving method.

CKAS-FLRS880 series is the best choice for aeration measurement and control due to its simple disassembly and wide range ratio

Plug-in structure, easy to install;

The menu can set the pipe type, which is convenient for metering.

Sewage treatment aeration measurement

Flare gas pipeline

Measure the flow of different sections of the flare gas pipeline.

Plug-in structure, easy to install;

Easy to disassemble and clean;

Wide turndown ratio.

Flare gas pipeline

Technical Parameters

Dimensions and structure diagram (unit: mm)

Plug-in Dimensions

The following figure is the size drawing of the plug-in welding seat, which is opened directly on the pipe and welded on the pipe with our matching welding seat.

The response time of the constant temperature difference method (CTA) and the constant power method (CPA) is completely different, as shown in the figure below, the response time of (CPA) depends on the reaction time for the fluid to take away the heat to its true value, while (CTA) It is different, the change caused by the two probes based on the constant temperature difference when the fluid changes requires the calculation program to make a fast response immediately.It also provides (CTA) response time