Products
CH-LWQ thermal gas mass flow meter is designed based on the principle of heat conduction technology, combined with Newton's law of thermodynamics, through the measurement of the heat carried away by the medium in the pipeline through the probe, directly measuring the mass flow rate or standard flow rate. It can be widely used in mass flow and standard flow measurement of various gases without temperature and pressure compensation. The product measurement method adopts constant power design with extremely low lower limit of measurement, wide range ratio, high measurement accuracy, easy installation and so on. The products are widely used in compressed air, gas extraction, natural gas measurement, aeration measurement, emission gas monitoring, process gas control and many other fields.
Features
Plug-in design, can be installed online with pressure;
Suitable for a wide range of pipe diameters and any shape of pipe with known cross-sectional area;
Large range ratio and wide range of measured flow rates;
No moving parts, no pressure loss;
Measurement of gas mass flow without temperature and pressure compensation;
Fully isolated electrical structure to filter out external interference;
Energy-efficient power supply design with extremely low power consumption;
Wide power supply voltage input range to adapt to a variety of complex power supply environment;
Large LCD display with two lines, easy to read;
With ModBus and HART fieldbus interface.
Product Features
Plug-in design, can be installed online with pressure;
Applicable to a variety of pipe diameters and known cross-sectional area of any shape pipe;
Large range ratio and wide range of measured flow rates;
No moving parts, no pressure loss;
Measurement of gas mass flow without temperature and pressure compensation;
Fully isolated electrical structure to filter out external interference;
Energy-efficient power supply design with extremely low power consumption;
Wide power supply voltage input range to adapt to a variety of complex power supply environment;
Large LCD display with two lines, easy to read;
With ModBus and HART field bus interface.
Application
1、Oxygen, nitrogen, hydrogen, chlorine and multi-component gas measurement. (Except acetylene gas).
2、Blast furnace gas, coke oven gas measurement.
3、Flue gas measurement.
4、Biogas, aeration in water treatment and chlorine measurement.
5、Compressed air measurement.
6、Natural gas, liquefied gas, flare gas and other gas flow measurement.
7、Power plant blast furnace primary air, secondary air flow measurement.
8, mine ventilation or exhaust system flow measurement.
Features
1、Measurement of gas mass flow without temperature and pressure compensation.
2, range ratio, measuring flow rate range: 0.1Nm / s ~ 100Nm / s.
3、No pressure loss, applicable to any shape of pipeline with known cross-sectional area.
4、Corrosion-resistant type sensor, suitable for measuring corrosive gases.
5, the full-range band of expert algorithms, especially suitable for large-diameter measurement to ensure the accuracy of the measurement, suitable for trade settlement.
6、Can excellently complete the leakage detection of process pipeline and equipment work.
7、The amount of construction is extremely small, due to the insertion structure, can be installed and maintained online.
8、Base type instrument can be displayed on the spot and with alarm control.
| Caliber mm | Flow range m³/h | Caliber mm | Flow range m³/h |
| DN10 | 0.16~2.5 | DN400 | 250～4000 |
| DN15 | 0.4~6 | DN500 | 400～6000 |
| DN20 | 0.6～12 | DN600 | 600～10000 |
| DN25 | 1.0～16 | DN700 | 800～12000 |
| DN32 | 1.6~25 | DN800 | 1000～16000 |
| DN40 | 2.5～40 | DN900 | 1200～20000 |
| DN50 | 4.0～60 | DN1000 | 1600～25000 |
| DN65 | 6.0～120 | DN1200 | 2500～30000 |
| DN80 | 10～160 | DN1400 | 3000～50000 |
| DN100 | 16～250 | DN1600 | 3000～60000 |
| DN125 | 25~400 | DN1800 | 5000～60000 |
| DN150 | 40～600 | DN2000 | 6000～100000 |
| DN200 | 60～1000 | DN2200 | 1367.78～136778.4 |
| DN250 | 100～1600 | DN2400 | 1627.78～162777.6 |
| DN300 | 160～2500 | DN2600 | 1910.38～191037.6 |
| DN350 | 200～3000 | DN2800 | 2306.56 ~ 236062.8 |
Product Selection
| model number | caliber |
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| CH-LEL | 10~2600 | |||||||
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nicknames | Installation form |
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| Y | all-in-one | |||||||
| F | split | |||||||
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nicknames | Converter Model | ||||||
| ZA | orbicular | |||||||
| ZB | Square (split only) | |||||||
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nicknames | Type of power supply | ||||||
| AC | 220V AC 50Hz(90~245V AC 50Hz) | |||||||
| DC | 24V DC (20~36V DC) | |||||||
| LD | Lithium battery powered (without signal output) | |||||||
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Medium temperature | ||||||
| ≤65℃ | ||||||||
| ≤120℃ | ||||||||
| ≤180℃(Split type only) | ||||||||
| nicknames | Lining Material | |||||||
| NE | neoprene（≤65℃） | |||||||
| PVC | （≤70℃） | |||||||
| PU | (≤80℃) | |||||||
| PTFE | （≤180℃） | |||||||
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| 316L | stainless steels | |||||||
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| Warm tips: flowmeter selection must, media, caliber (flow range), electrode material, lining material, installation requirements | ||||||||
| Electromagnetic flow meter | ||
| vantage | drawbacks | |
| 1 | There are no moving parts and no throttling parts in the measuring tube to impede the flow of fluid, which does not cause any additional pressure loss when the fluid passes through the meter. | It can only measure the liquid flow of conductive media, not the flow of non-conductive media |
| 2 | Electromagnetic flow meters can be used to measure the flow of other electrically conductive liquids after calibration with water only. | Cannot be used to measure gases, vapors, or liquids containing large quantities of gases. |
| 3 | Their range ratios can be up to 20:1, and some even up to 100:1 range ratios. | The medium in the pipe must be full, and cannot be measured out of a full pipe. |
| 4 | No mechanical inertia, sensitive response, can measure instantaneous pulsating flow, positive and negative direction of flow | Can only be measured above DN10 pipe, not applicable to small diameter |
| 5 | Measure the flow of corrosive media, spoiled media and suspended liquid-solid two-phase flow. | Cannot measure hydrofluoric acid media |
1, should be installed in the horizontal pipeline lower and vertically upward, avoid installation in the pipeline *** point and vertical downward;
2、It should be installed at the rising place on the pipeline;
3, in the open discharge pipeline installation, should be installed in the lower part of the pipeline;
4、If the pipeline drop is more than 5m, an exhaust valve should be installed downstream of the sensor;
5, should be installed downstream of the sensor control valves and shut-off valves, and should not be installed in the sensor upstream;
6, the sensor *** can not be installed in the pump inlet and outlet, should be installed in the pump outlet.
