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    Fixed Nitrogen (N2) Gas Detector, 0 to 100% Vol

    5 out of 5 based on 8 reviews | Write a review
    Buy nitrogen gas detector from high-quality manufacturer at good price. Measuring range 0-100% Vol, supports remote control, optional output signal 4-20mA and RS485, high accuracy 3% F.S, fast response within 10s. N2 gas detector for nitrogen concentration detecting and leak monitor, sound and light alarm, 24h online, real-time display, fixed mounting.
    SKU: GD300-N2
    30-day Returns
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    Delivery date: 6-12 days

    Excellent supplier nitrogen gas detector for sale. Working range 0 to 100% Vol, remote control with 4-20mA & RS485 output signal, supports sound and light alarm. Fixed N2 gas detector for nitrogen concentration detecting and leak monitor, high quality, low price.


    • Nitrogen gas detector adopts high precision sensor for accurate gas leak detection.
    • Nitrogen gas detector is equipped with 3-wire system 4-20mA analog output, relay output, RS485 output (optional).
    • The N2 gas detector is compatible with various controlled alarms, PLC, DCS and other control system, and can be remote monitored.
    • Explosion-proof design, fast, relaible and stable.
    • Infrared ray controller can remote control the alarm point settings, zero calibration, and address modification.
    • Two-stage alarm with sound and light, and the alarm point is settable.
    • The nitrogen gas detector has self-calibration function, and three standard keys will be used to realize on-site maintenance.
    • The N2 gas detector can output one or two on-off signals, can drive ventilator, solenoid valve or other external devices.


    Model GD300-N2
    Detection Principle Electrochemistry
    Gas Nitrogen (N2)
    Range 0-100% Vol
    Resolution 0.01% Vol
    Accuracy ≤±3% F.S.
    Responce Time ≤10s
    Repeatability ≤±1%
    Recovery Time ≤10s
    Linearity Error ≤±1%
    Zero Shift ≤±1% (F.S./year)
    Signal Output (Optional) Note 4-20mA and RS485
    Relay output: one group of relay output (1NO+1NC, 24V 100mA) for one alarm (default), or two groups of relay output (2NO+2NC, 24V 100mA) for high/low alarm (optional).
    Alarms Sound, light
    Display High light nixie tube display
    Installation Wall-mounted, piping type, flow-type (according to the detected environment)
    Connection G1/2 is the inlet and outlet for power and signal lines
    Pipe-mounted type: The installation thread size of the instrument is M45*P2.0
    Operating Time 24h
    Explosion-proof Grade Ex d llC T6
    Protection Grade IP65
    Certification CE, ATEX
    Working Voltage 12~36V DC
    Case Material Die-casting aluminum housing
    Operating Temperature -20℃~50℃
    Operating Humidity 0~95%RH (non-condensing)
    Dimension 206*179*90mm
    Weight ≤1.6kg
    Accessories Power adapter: Input 100-240VAC 50/60Hz, Output 24VDC 2A (Optional USA plug & Europe plug)

    Note: To measure confined spaces such as pipelines, please contact us and inform the detailed conditions of use.

    Fixed Nitrogen (N2) Gas Detector Dimension (Unit: mm)

    Fixed gas detector with alarm dimension

    ***Other Common Gases and Ranges Available for Fixed Gas Detectors

    Gas Type Measure Range Resolution
    Ammonia (NH3) 0-50/100/200/500/1000ppm 0.01ppm/0.1ppm/1ppm
    Benzene (C6H6) 0-1/10/50/100/200/1000/2000/5000/10000ppm 0.001ppm/0.01ppm/0.1ppm/1ppm
    Carbon Dioxide (CO2) 0-1000/2000/5000/9999ppm, 0-1/5/100%VOL 0.1ppm/1ppm/0.001%VOL
    Carbon Monoxide (CO) 0-10/20/50/100/500/1000/2000ppm 0.01ppm/0.1ppm/1ppm
    Chlorine (Cl2) 0-10/20/50/100ppm 0.01ppm/0.1ppm
    Chlorine Dioxide (ClO2) 0-1/5/10/20/50/100ppm 0.001ppm/0.01ppm/0.1ppm
    Ethylene (C2H4) 0-50/100/500/1000/2000ppm 0.01ppm/0.1ppm/1ppm
    Formaldehyde (CH2O) 0-10/20/50/100ppm 0.01ppm/0.1ppm/1ppm
    Hydrocarbons (HC) 0-100%LEL 1%LEL
    Hydrogen (H2) 0-1000/2000/5000/9999ppm, 0-1/4%VOL 1ppm/0.001%VOL
    Hydrogen Chloride (HCL) 0-10/20/50/100/200ppm 0.01ppm/0.1ppm
    Hydrogen Cyanide (HCN) 0-10/20/50/100ppm 0.01ppm/0.1ppm
    Hydrogen Sulfide (H2S) 0-20/50/100/200ppm 0.01ppm/0.1ppm
    Methane (CH4) 0-50/100%VOL, 0-100%LEL 0.01/0.1%VOL/1%LEL
    Nitric Oxide (NO) 0-20/50/100/250/500/1000ppm 0.01ppm/0.1ppm/1ppm
    Nitrogen (N2) 0-100%VOL 0.01%VOL
    Nitrogen Dioxide (NO2) 0-20/50/100/500/1000ppm 0.01ppm/0.1ppm/1ppm
    Nitrogen Oxides (NOX) 0-1/5/10/20/50/100/250/500/1000ppm 0.001ppm/0.01ppm/0.1ppm/1ppm
    Oxygen (O2) 0-25/30%VOL 0.01%VOL
    Ozone (O3) 0-1/5/10/20/50/100ppm 0.001ppm/0.01ppm/0.1ppm
    Phosphine (PH3) 0-10/20/50/100/500/1000/2000/3000ppm 0.01ppm/0.1ppm/1ppm
    Sulfur Dioxide (SO2) 0-20/50/100/500/1000ppm 0.01ppm/0.1ppm/1ppm
    Volatile Organic Compounds (VOC) 0-1/5/10/20/50/100/200/500/1000/2000/5000/10000ppm 0.001ppm/0.01ppm/0.1ppm/1ppm
    Combustible Gas (EX) 0-100%LEL 1%LEL

    Note: Some common gases and the measuring ranges are listed in the above table. For more information, please feel free to contact us.


    Fixed Nitrogen (N2) Gas Detector Details

    Tips: Maintenance of nitrogen gas detector.

    1. Regularly calibrate, test and inspect the nitrogen gas detector. In general, the calibration frequency is once a year.
    2. As the most important part of nitrogen gas detector, the sensor should avoid exposure to the gas generated by inorganic solvents or organic solvents as much as possible. Especially for electrochemical sensors used to detect toxic and harmful gases, the evaporation or contamination of the electrolyte will cause the signal of the sensor to drop and shorten the service life of the N2 gas detector.
    3. When installing the nitrogen gas detector, please do not put it close to the wall, and reserve enough space around it for daily maintenance and troubleshooting.
    4. Ensure that the nitrogen gas detector is in a dry state to avoid affecting its detection accuracy and service life due to the humid environment.
    5. The entire outside of the nitrogen gas detector needs to be kept clean. You can wipe the surface with a soft damp cloth. Do not use a damp cloth dripping with water to prevent water droplets from accidentally splashing into the N2 gas detector.
    6. Dust cover of the sensor is for protection. In order to prevent the dust cover from being blocked by dust and affecting the use of sensor, it should be cleaned regularly.

    Gas Detector 3-Wire System

    In the realm of gas detection systems, the 3-wire configuration offers a robust wiring solution, especially for applications requiring analog output. This video will show you the 3-wire gas detector wiring.

    Gas Detector 4-Wire System

    The wiring of the 4-wire gas detector supports the RS485 interface Modbus RTU communication mode. This video will show you the 4-wire gas detector wiring.

    Using Cloud Data and 4G for Fixed Gas Detectors

    This video will show you about the applications of cloud data and 4G transmission for fixed gas detectors.

    Monitoring Combustible Gas in Pipelines

    This video will show you how to monitoring combustible gas in pipelines.

    Existing reviews of Fixed Nitrogen (N2) Gas Detector, 0 to 100% Vol
    Inquiry on details
    I am planning on using this in the pipe configuration and want to measure Nitrogen concentration in a mixture of Nitrogen and Oxygen gas. If the flow rate is only around 100 mL/min, will the results still be accurate? This is assuming the gas is near standard temperature and pressure.
    From: Elena | Date: 13/06/2024
    Was this review helpful? Yes No (0/0)
    ATO Responded
    The required flow rate of gas in the pipeline is 400~800ml/min.
    100ml flow rate is too small and can Not be used normally.
    Fixed Nitrogen (N2) Gas Detector
    Can the sensor be placed in line tubing with pressurized gas? or is this for atmosphere detection only?  Or is there a way to mount the detection point in line with the gas flow?
    From: calebs | Date: 28/11/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    In this case, you need to reduce the gas pressure in the pipeline to 1Bar±10% before it can be used normally, such as installing a pressure regulating device on the pipeline.
    Can the external box of gas detector be mounted outside?
    I have another question. Will it be electrically classified?
    Can the external box be mounted outside?
    From: coco | Date: 25/07/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Unfortunately, the external box cannot be mounted outside, it can only be mounted indoors. If you want to install it outside, you must install a rain shield, which is equivalent to IP20.
    Use environment of nitrogen gas detector
    Can we use your Nitrogen gas detector outdoors? Can it trace Niterogen leakage?
    From: Boyer | Date: 27/12/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    1. Our gas detector (N2) can be used in outdoor environments, but the temperature range is from -20 ℃ to 50 ℃.
    2. Our nitrogen (N2) detector can only detect the purity of 100%vol, but cannot detect the ppm with trace leakage.
    Can we use the nitrogen gas detector outdoors?
    Can we use your nitrogen gas detector outdoors? Can it trace nitrogen leakage?
    From: Pilgreen | Date: 23/12/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    1. Our gas detector (N2) can be used in outdoor environments, but the temperature range is from -20 ℃ to 50 ℃.
    2. Our nitrogen (N2) detector can only detect the purity of 100%vol, but cannot detect the ppm with trace leakage.
    How to use the nitrogen gas detector?
    When we turn on your N2 gas detector, it shows 78.10% volume, beep and pump is on what does 78.10% signify. According to manual pump, it should be turned if we don’t use how to turn off the pump.
    From: Nickolas | Date: 02/12/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    A. Since the concentration of nitrogen in the atmosphere is 78.10%, the meter will show 78.10% when it turns on.
    B. Please put the detector in clean air for about 5 minutes and wait for the data to fall down to normal before turning it off after measurement.
    Can ATO's nitrogen gas detector work for this?
    We suspect that some nitrogen is entering our steam system through leaking valves. I want to test the presence of N2 by cracking a steam valve and putting sniffer in close proximity to steam discharge but not in it. Will gas detector work for that?
    From: Tammi | Date: 07/11/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, if the steam system pipeline is in a normal air environment, which means that the steam discharge port is in the normal air but no other mixed gas, then the unit N2 portable detector 0-100%VOL can work for that, with no problem at all.
    Can the nitrogen gas detector detect pure nitrogen leakage?
    Can I use your N2 gas detector to check for ultra-high purity nitrogen leakage?
    From: Tobar | Date: 28/07/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, N2 gas detector can detect ultra-high purity nitrogen leakage, the detection range is 0-100% VOL.
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