Product Description
SL Series MEMS Gas Mass Flow Meter Thermal Sensor DC24V RS485 Air Nitrogen Oxygen Hydrogen Argon Controller Industrial Use
SL Series MEMS Gas Mass Flow Meter Thermal Sensor DC24V RS485 Air Nitrogen Oxygen Hydrogen Argon Controller Industrial UseThis flow meter is equipped with RS485 output by default. If you require a 4-20mA output, kindly contact our customer service team for help.
1.NOTE
Due to SKU quantity limits, the complete list of measurable gases and flow ranges cannot be displayed. If you need to measure other gases or specific flow ranges, please contact us.
Mediums Supported: Air, Oxygen, Nitrogen, Argon, Methane, Propane, Carbon Dioxide, Hydrogen, and Nitrogen. Please specify the medium when placing your order, as different gases have different densities and require factory-specific calibration. If no medium is specified, Air will be used by default.
Default Specifications:
Power Supply: DC 24V
Temperature Range: -10 to 55°C
Pressure Limit: <1MPa
Connection: G3/8 Male Thread
Accuracy: ±2%
Output: RS485
Customizable Options:
Connection Types: Can be converted to ferrule connector, quick-connect fitting, or hose barb
Thread Options: G3/4 Male Thread, NPT 3/4 Male Thread
2. Parameters
Parameter | Specification |
Measuring Medium | Air, O₂, N₂, Ar, CH₄, CO₂, H₂, etc. |
Flow Range | 5–1000 NL/min |
Min Detectable Flow | 5 NL/min |
Accuracy | ±2.0% FS |
Power Supply | DC 24V / 2.5W |
Working Pressure | ≤1.0 MPa |
Medium Temperature | -10~55℃ |
Humidity | <95% RH (non-condensing) |
Display | Instantaneous and total flow |
Analog Output | 4–20 mA |
Digital Output | RS485 (Modbus RTU, optional) |
Switch Output | Customizable NPN/PNP |
Response Time | 50–1000 ms |
Connection Type | G3/8 or G3/4 male thread |
3. Features
Multi-Gas Compatibility
Compatible with a wide range of gases, including air, oxygen, nitrogen, methane, hydrogen, and more.
Wide Flow Range with High Accuracy
Measures flow from 5 to 1000 NL/min with ±2.0% FS accuracy, ensuring reliable and precise monitoring.
Real-Time Flow Monitoring
Provides both instantaneous and cumulative flow readings for full process visibility.
Versatile Output Options
Supports 4–20 mA analog output and RS485 digital communication (Modbus RTU) for flexible integration.
Compact MEMS Sensor Design
Offers low power consumption, high sensitivity, and long service life in a compact, space-saving design.
4. Applications
Ideal for use in metallurgy, papermaking, pharmaceutical manufacturing, hydropower engineering, petroleum, and chemical industries.








5. FAQs
Q1: Is this flow meter suitable for hydrogen or methane gas?
A1: Yes. It is designed to measure hydrogen, methane, and a variety of other industrial gases. Please specify the gas type when ordering to ensure proper factory calibration.
Q2: Does it support both analog and digital outputs?
A2: Yes. The device supports 4–20 mA analog output and RS485 digital communication with Modbus RTU protocol, allowing easy integration into different control systems.
Q3: Can the switch output be customized?
A3: Yes. NPN and PNP switch output options are available upon request to meet different application requirements.
About Prime Living
Prime Living is a Canadian online store offering a carefully selected range of quality products for home, automotive, tools, outdoor living, electronics and more.
We are committed to fast order processing, secure packaging and reliable tracked shipping to provide an excellent shopping experience.
Shipping policy
We carefully handle each order to ensure your package arrives quickly and safely. Please note that factors such as weather, postal traffic, or carrier performance may occasionally cause delays beyond our control.
We provide free shipping and dispatch all orders within 2 business days of payment, often sooner. All shipments are sent via international express air shipping, with a tracking number provided so you can follow your order every step of the way.
. Please provide a physical address, as we do not ship to P.O. Boxes.
Returns
Your satisfaction is important to us. Hexlight offers a 14-day Free return policy: if you are not fully satisfied with your purchase, you may request either a full refund or an exchange. All return shipping costs are fully covered by us.
Condition
Brand New
Shipping
This item is shipped directly from our supplier in China with tracking.