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  • XG-RSL series thermal gas mass flowmeter
  • XG-RSL series thermal gas mass flowmeter

XG-RSL series thermal gas mass flowmeter

The XG-RSL series thermal gas mass flowmeter is developed based on the rate of fluid heat absorption directly related to the mass flow rate, and has a wide range of applications.

Working Principle:
The XG-RSL series flowmeter/flow switch is a flowmeter based on the principle of thermal diffusion. That is to say, when a fluid flows through a heating object, the amount of heat lost by the heating object is proportional to the flow rate of the fluid. Specifically, the sensor of this flowmeter has two standard-grade RTDs, one used as a heat source and the other used to measure fluid temperature. When the fluid flows through, the temperature difference between the two has a nonlinear relationship with the flow rate, and the instrument can convert this relationship into a linear output of the measured flow signal.                                    

Product Features:
1. Adopting highly stable patented platinum RTD sensor technology;
2. Adopting proprietary technology "balanced structure packaging" and self-compensating for medium temperature;
3. Proprietary algorithms that can achieve high linearity, high repeatability, and high accuracy;
4. The range ratio is 1000:1 and can be expanded according to user requirements;
5. It can achieve measurement of large pipe diameter and small flow rate, with a minimum flow rate as low as zero and a resolution of 0.001m/s,
Low flow velocity measurement is very sensitive;
6. No movable parts; vibration effects can be ignored;
7. The requirement for a straight pipe section is not high, 1-2D:
8. It is independent of the temperature and pressure of the medium, and can directly measure the mass flow rate without temperature and pressure compensation;
9. Exclusive high-temperature algorithm; medium temperature can reach +510 °C;
10. Supports 12-point dynamic correction for traffic signals, with built-in 10-point correction;
11. Online dynamic correction of current/voltage output;
12. Not sensitive to small particles such as dust;
13. Convenient design and selection, easy installation and use, online uninterrupted loading and unloading, and easy maintenance.                                                          

Application industry:
1. Oil and gas industry
Energy exchange; Gas recovery from filling wells; Gas metering; Gas quality analysis; Leakage test; Natural gas measurement; Monitoring of Torch Gas.
2. Power industry
Gas measurement during gas distribution in fuel systems; Measurement of various gases in boilers and auxiliary systems; Gas measurement on gas stoves; Hydrogen measurement; Measurement of primary and secondary air in power plant blast furnaces.
3. Chemical industry
Smoke circulation monitoring; Gas flow measurement in sampling system; Gas flow measurement of induced draft fan; Measurement of ammonia gas in fertilizer plants; Measurement of various gas flow rates in battery factories.
4. Metallurgical industry
Gas filling measurement in 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 steel rolling plants; Control of gases such as hydrogen, oxygen, and ammonia in heat treatment quenching furnaces.
5. Pulp and paper industry
Measurement of gases in wastewater treatment systems; Smoke flow monitoring; Boiler recovers secondary/tertiary air; Measurement of gas and air supply for boilers.
6. Food and pharmaceutical industry
The addition of fresh air during processing operations; CO2 treatment in breweries; The flow rate of hot air in the bottle sterilizer; Measurement of gas flow rate during thermal oxidation process; Ventilation system; Boiler intake, exhaust gas, and process control.
7. Environmental Protection
Gas measurement during biogas utilization process; Measurement of chlorine gas during chlorine treatment process; Gas measurement in aeration tanks during sewage treatment process; Monitor the emissions of SO2 and NOX from the exhaust of the chimney.
8. Other industries
Factory compressed air measurement; Coal powder combustion process with powder/gas ratio control fuel; Control of Hot Gas Flow from Vertical Grinding Machines in the Cement Industry.

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FAQ Performance Specifications

Q1: Do thermal gas mass flow meters require temperature and pressure compensation?
A: No need. It is based on the principle of thermal diffusion to directly measure gas mass flow rate, which is not affected by gas temperature and pressure fluctuations. It can directly output standard condition volume flow rate, eliminating the need for additional temperature and pressure compensation modules.

Q2: Can liquid droplets, high humidity, or vapor media be measured?
A: Cannot measure steam or liquid; Suitable only for the dry gas phase. If the gas carries a large number of condensed liquid droplets, the liquid adhering to the sensor will change the heat dissipation characteristics, causing reading drift and even damaging the probe. It is recommended to install a gas-liquid separator at the front end for wet conditions.

Q3: Will changes in gas composition affect measurement accuracy?
A: I will. The instrument is set according to the thermal conductivity parameters of the calibration gas (such as air, nitrogen) when it leaves the factory. Changes in gas composition and thermal conductivity will cause errors. The working conditions with frequently changing components require resetting the medium parameters or recalibration.

Q4: What are the requirements for installing straight pipe sections?
A: Generally, upstream ≥ 10D and downstream ≥ 5D straight pipe sections are required, where D is the inner diameter of the pipeline. Upstream elbows, valves, and reducers can disrupt the flow field, while shortening straight pipe sections can cause flow fluctuations and decreased accuracy. Avoid strong vibration and liquid accumulation during installation.

Item Specification
Measuring Range 0–120 Nm/s (20°C, 101.33 kPa)
Accuracy ±1% of reading, ±0.5% of full scale
Turndown Ratio Typically 100:1 (depends on calibrated flow range)
Pipe Diameter Range 10 mm – 6000 mm
Application Suitable for various single or mixed gases; dusty, sand-laden, humid, and various corrosive gases
Ambient Temperature −40°C to +85°C (without display); −30°C to +70°C (with display); humidity < 90% RH
Medium Temperature −40°C to +100°C; −40°C to +200°C; −40°C to +450°C; −40°C to +510°C
Sensor Diameter φ3, φ2.5
Insertion-type Probe Diameter φ19 (standard), φ16, φ12
Sensor Material 316 stainless steel, Hastelloy, titanium
Probe Material (protective sheath) 316 stainless steel (standard), Hastelloy
Flow Measurement Bidirectional medium flow measurement
Analog Output Flow: 4–20 mA DC; Temperature: 4–20 mA DC; max. load 1000 Ω
Pulse Output Totalized pulse output
Linearization 12-segment keypad nonlinear correction; 10-segment built-in nonlinear correction
Communication Serial output RS232 / RS485
Power Supply 24 VDC / 600 mA; 220 VAC / 2 W; 110 VAC / 3 W
Alarm 1–2 relay outputs, 5 A / 220 V, 5 A / 30 VDC; keypad-programmable
LCD Display Large-screen LCD: 7-digit instantaneous flow, 8-digit totalized flow
Process Pressure 1.6 MPa (max. 20 MPa)
Installation Type Insertion type (compression fitting, compression fitting + ball valve, flange connection); inline type (flange, threaded connection)
Explosion-proof Rating Intrinsically safe (ia II CT5); flameproof (Ex d II CT4)
Protection Rating IP65

XG-RSL Thermal Gas Mass Flow Meter
Nominal Diameter —XXX 100 means DN100
Mounting Type G In-line type
C Insertion type 1 Thread connection
2 Flange connection
3 Flange ball valve connection
Temperature Range 1 -40℃ ~ +100℃
2 -40℃ ~ +200℃
3 -40℃ ~ +450℃
4 -40℃ ~ +510℃
Nominal Pressure A 0 ~ 0.6 MPa
B 0 ~ 1 MPa
C 0 ~ 1.6 MPa
D 0 ~ 2.5 MPa
E 0 ~ 4 MPa
F 0 ~ 6.4 MPa
G 0 ~ 10 MPa
H 0 ~ 16 MPa
Process Condition 0 Standard
1 Corrosion-resistant
2 Explosion-proof
3 High temperature
Signal Output 1 No output
2 4 ~ 20 mA
3 RS485 MODBUS
Power Supply 1 220V AC
2 24V DC

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Xinguo Group Co., Ltd.
ABOUT US Xinguo Group Co., Ltd.
Xinguo Group Co., Ltd. is a high-tech enterprise with subsidiaries including Anhui Xinguo Instrument Co., Ltd., Anhui Xinguo Alloy Co., Ltd., Anhui Xinguo Cable Co., Ltd. and Anhui Xinguo Precious Metals Co., Ltd. Founded in 1997, the Group is located in Tianchang City, Anhui Province — a National Civilized City. It has a registered capital of 118 million RMB, covers a land area of over 150 mu and a building area of 60,000 square meters. The company currently has more than 300 employees, among whom over 50 are professional and technical personnel including senior engineers, engineers and assistant engineers.
The Group is a China Custom XG-RSL series thermal gas mass flowmeter Manufacturers and XG-RSL series thermal gas mass flowmeter Supplier, mainly engages in the R&D, production and sales of temperature instruments, pressure instruments, level instruments, flow instruments and digital display instruments. Its product portfolio also encompasses power cables, control cables, compensation cables, computer cables, signal cables, MI heating cables, mineral insulated cables, electric heat tracing tapes, cable trays and accessories, high and low voltage distribution equipment, complete automation control systems, instrument valves, pipeline valves and fittings, glass instruments and laboratory equipment. We also supply platinum-rhodium wires, precision alloys and complete mechanical equipment, while providing supporting processing, manufacturing, sales and technical services. Additionally, we deal in professional instrument materials, alloy materials and precious metals. Our products are widely applied in power, petroleum, chemical, metallurgy, building materials, machinery, food, aerospace, new energy and other industrial sectors, as well as scientific research and education fields.
Anhui Xinguo Alloy Co., Ltd. is dedicated to manufacturing a full range of precision alloy materials and serves as a council member of the Instrument Materials Branch of China Instrument & Control Society. Its flagship products cover thermocouple alloy wires (K, N, E, J, T types), thermocouple compensation alloy wires (KX, EX, NX, JX, TX, KCA, KCB, NC, SC), high-resistance heating alloys, precision resistance alloys, heating resistance alloys, pure nickel wires, manganese-copper alloys and Monel alloys. These products are extensively used in aviation, petroleum, chemical engineering, machinery manufacturing, power and energy industries.
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