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    Digital Gas Flow Meter, Air/Oxygen/Nitrogen, 0-250L/min

    5 out of 5 based on 11 reviews | Write a review
    Small gas mass flow meter, selectable flow range 0~20L/min (DN 6mm), 0~100L/min (DN 8mm) and 0~250L/min (DN 12mm). Digital display, easy to read. High sensitivity and good repeatibility, accurate to trace the flow rate. Battery-powered, low power consumption. Favorable price and high reliability, suitable for instantaneous flow rate and flow accumulation of compressed air, oxygen, nitrogen, etc.
    SKU: ATO-FLOW-MF5700
    30-day Returns
    Free Shipping
    Delivery date: 2-3 days

    Digital gas flow meters are available for flow range 0~20L/min with 6mm diameter and 0~250L/min with 12mm diameter. The gas mass flow meter is used for instant flow rate testing and flow accumulation calculation and suitable for different gas like compressed air, oxygen, nitrogen, CO2, Ar and other inactive gases, etc.


    Model ATO-MF5706 ATO-MF5708 ATO-MF5712
    Flow Range 0~20L/min 0~100 L/min 0~250 L/min
    Power Supply 4 AA batteries (LR6) or 5-24V DC
    Power Adapter Input: 100-240V AC, 50/60Hz, Output: 7V DC, 0.2A
    Power Consumption ≤10mW
    Signal Output RS 485
    Display LCD
    Display Unit Instantaneous flow rate: L/min, Flow accumulation: m3
    Accuracy ± (2.0+0.5FS)%
    Instantaneous Flow Resolution 0.01 L/min
    Flow Accumulation Resolution 0.001 m3
    Working Pressure ≤0.8MPa
    Pressure Loss ≤600Pa ≤1000Pa ≤2000Pa
    Working Temperature -10℃ ~ +55℃
    Humidity 0~95%RH (non-condensing)
    Keyboard 3 keys
    User Interface Type-C USB port (This interface is connected to the power adapter for power supply, power cable is 0.5m, and it can also be used as a connection interface for 485 communication.)
    Calibration Air @20℃, 101.325kPa
    DN 6mm 8mm 12mm
    Mechanical Connection NPT 1/4" NPT 3/8" NPT 1/2"
    Weight 185g (Copper body) 270g (Aluminium alloy body) 350g (Aluminium alloy body)
    Protection Class IP40
    Gas * Air, N2, O2, Ar, CO2.
    For other gases, please contact us.
    Accessories 1. Power adapter, Type-C USB with 0.5m cable
    2. RS485 data cable, Type-C USB port
    PDF Digital Gas Flow Meter User Manual

    Dimension (Unit: mm)

    Gas flow meter dimension

    Model L W D
    ATO-MF5706 67 40 NPT 1/4
    ATO-MF5712 98 50 NPT 1/2

    Accessories (Optional)

    Gas flow meter user interface cable

    Note: The optional miniUSB cable is used for the connection to external power supply and RS485 communication.

    Tips: Digital Gas Flow Detector Installation

    The gas flow meter is preferably installed horizontally. Flow direction should be the same as the direction of the arrow mark on the meter body. If there may be particles or debris in the fluid, a filter is strongly recommended to be installed upstream of the meter.

    Please follow the below steps to complete the installation:

    1. Check if the meter is complete, no visual damage first.

    2. Before installation, make sure that there is no debris or particles in the pipe.

    3. During installation, it is recommended to first install the inlet of the flow meter and then the outlet. To ensure the accuracy of measurement, the straight pipe length should be remained enough at the installation site of flow meter, upstream no less than 10 times DN and downstream no less than 5 times DN.

    4. Make sure all the wire connections of the flow meter is correct including the wires for LCD, input/output and communication.

    5. Turn on the power supply, and ensure that the LCD works properly.

    6. Slowly turn on the valve of the pipeline, and then the flow meter starts to measure the gas flow in the pipeline.

    Existing reviews of Digital Gas Flow Meter, Air/Oxygen/Nitrogen, 0-250L/min
    Digital Gas Flow Meter, Air
    Does this come with 0-10V analog output (or mA output)?
    From: Michael | Date: 07/11/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Unfortunately, this only has RS485 signal output.
    Question for a gas flow meter
    My name is Colin and I work for Black & McDonald Limited. We are assisting one of our clients with submetering so that they can measure the amount of each input they put into their production process. There are 4 gases that we need to submeter:

    Compressed air (1.5” iron)
    Novex (0.5” copper)
    Argon (1” copper)
    SF6 (0.5"" copper)
    From: Colin | Date: 23/10/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    The ATO-FLOW-MF5700 flow meter is not suitable for your application.
    I need technical support for new gas application
    I have a flowmeter I just purchased, MF5708 and I need assistance with calibrating it for a different gas use aside air. According to the manual, I need technical support to change the GCF for new gas application.
    From: Beahn | Date: 15/08/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    What gas are you trying to measure now? If it is to measure nitrogen and oxygen, GCF does not need to be modified and can be used directly.
    What does flow meter standard condition refer to?
    By standard conditions, are you referring to 20C at 101.325kPa or something else?
    I am trying to better understand the difference between a measurement of flow rate under working pressure and a measurement of flow rate under standard conditions.  
    I was under the impression that each device measures flow rate and there shouldn’t be a difference.
    From: greer | Date: 25/07/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    1. Yes, the standard condition refers to the flow rate at 20°C under 101.325kPa, and the working condition refers to the flow rate under the actual working state. Generally, the pipeline has a certain pressure.
    2. After the measuring pipeline passes through our flowmeter, it becomes the working condition of the standard condition, which is the main difference from the rotary flowmeter.
    If you want to compare the measurement results of different flow meters, you should refer to the same type of flow meter.

    Hope my explanation is able to assist you.
    Please feel free to let us know if you have any further questions.
    Why am I seeing such different numbers?
    Ah, I see, no worries. I can just do the conversion myself. I am seeing a bigger problem with the Flow meters we bought, the values they are producing seem to be off by a factor of  2.

    I am testing compressed air flow rates through some of our assemblies and initially recorded the flow rates using Dwyer Rotameters. The idea to use a Digital Flow Meter instead of the Rotameters came up so we purchased your Meter with the Calibration Certificate.

    I wanted to verify that similar measurements were recorded between the rotameter and Digital Flow Meter, so I put them in line with one another and ran compressed air through them.

    Why am I seeing such different numbers?
    From: hani | Date: 25/07/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    The rotameter measures the flow rate under the working pressure. Under the working pressure, the gas is compressed, and the measured flow rate is relatively small.
    Our gas flowmeter measures gas under standard conditions, and the flow rate is relatively high. The principle of measurement is different, so the reading will be a little different, which is normal.
    I have a question about gas mass flow meter
    I have a question about your Gas Mass Flow Meter Model MF5700. In your technical datasheet, there is an indication to "Slowly open/close valves to prevent abrupt pulse flow impact".
    What are the consequences of transgressing this guideline?
    Is that likely to damage the sensor or will just cause the response time to be lower than your spec?
    I am looking for a sensor that will measure airflow in a line used by a robotic gripper. The gripper should be using around 90 LPM, I will not have a practical way to supply de air "slowly" as the gripper uses electro valves that are opening in a matter of milliseconds.
    From: momo | Date: 21/07/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    If the valve is opened instantaneously, it will cause excessive airflow and pressure in the pipeline, which may cause damage to the sensor chip and damage the sensor.
    So we suggest that you try not to use electric valves to control pipeline opening/closing.
    How to determine the accuracy of flow meter?
    For this flowmeter, I would like to know how to determine the accuracy
    When I click on the user manual on the webpage, on page 30 of the user manual I see the equation highlighted below.  
    If I purchase the 0-20 L/min flowmeter, how do I use this equation to figure out the accuracy?  
    If I plug in the full-scale flow rate of 20L/min, I get plus or minus 2.0 0.5*20 = 12%.  
    Is that correct?
    From: helah | Date: 18/07/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    To determine the accuracy:
    For 0-20 L/min flowmeter, if the measured flow is currently 10L/MIN, the accuracy is 2+0.5(20/10)%=3%.
    Is there any reason we couldn't use gas flow meter to calibrate for air?
    Is there any reason we couldn't use gas flow meter to calibrate for air and then use the 1.39 conversion factor between air and natural gas? What are the wetted materials on that one?
    From: Sapelloly | Date: 27/06/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    1. Yes, if you don't consider explosion-proof requirements, you can also use ATO-MF5706 calibrated for air, then use the 1.39 conversion factor between air and natural gas.
    2. The gas flow meter is Not explosion-proof, and there may be potential safety hazards. If you encounter safety problems in system applications, you need to bear it yourself.
    Excellent digital gas flow meter
    I'm very satisfied with this digital gas flow meter. Both in terms of appearance and performance, it is excellent. LCD can clearly display the data I need. I will recommend to my friends.
    From: Alston | Date: 24/10/2022
    Was this review helpful? Yes No (0/0)
    Request for cooperation and price offer
    Dear Ms and Mrs,

    It is our pleasure to contact you.  

    My name is Anujin, a chemist, representative at Medimpex International LLC of Mongolia established in 2003 and a proud partner of Asian Development Bank, WHO, Luxemburg government, and other international and national institutions implementation of numerous projects of paramount importance in the health and education sector.  
    We supply medical diagnostic, health care and laboratory equipment, hospital disposables, machinery products, and tools to the Mongolian market for your information. Our company is an official distributor for Olympus- Endoscopy /Japan and Germany/, Siemens Healthcare, Draeger Medical /Germany/, Agilent technologies /US/, Standard Diagnostics /US/, etc.

    As we are one of the leading suppliers, we care engineering and maintenance service after sales in our territory, we are a successful and best-known company in a sector of medical, laboratory and education equipment businesses.  

    Since we are expanding our sales in a related market, I would like to ask your cooperation and price offer on your products such as “Digital Gas Flow Meter, Air/Oxygen/Nitrogen, ATO-MF5706”.

    For further discussion, please feel free to contact me back.

    I will be waiting for the response at your earliest convenience.

    Best Regards,
    Anujin B.
    From: Anujin | Date: 22/06/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Digital gas flow meter price needs to be determined according to your planned purchase volume and measuring objects.
    Looking for a gas flow meter for argon...
    Would you have a gas flow meter similar to ATO-MF5712 that is suitable for argon?
    From: Herbert | Date: 07/12/2020
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, we can customize model: ATO-MF5712 to be used for argon, but with the following specs:
    Flow rate range: 10 – 200 L/min
    Supply pressure: 0.8MPa (max)
    Connection: 1/2 NPT
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