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    Fixed Ammonia (NH3) Gas Detector, 0 to 50/100/200 ppm

    Fixed ammonia gas detector is used to detect the concentration of NH3 with selectable measure range of 0 to 50/100/200 ppm. NH3 detector with sound and light alarm and real-time display, available with signal output 4-20mA, 0-5V, RS485, RS232 and relay, high accuracy and high reliability.
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    Delivery date: 6-12 days

    Fixed type NH3 gas detector is used to monitor the ammonia concentration in different kinds of refrigerated space, liquid ammonia tank storage area, laboratory, livestock farm, sewage treatment plant, denitrification chemical industry, etc. NH3 measuring ranges is optional for 0 - 50ppm, 0-100ppm, 0-200ppm.


    • Unique infrared ray control function, which can remote control the device.
    • Being compatible with all kinds of controlled alarms, PLC, DCS and other control system, and can be remote monitored.
    • Explosion-proof design - Exia ll CT6
    • Self-calibration function, and three standard keys will be used to realize on-site maintenance.
    • Two-stage alarm with sound and light, and alarm point is settable.
    • With self-calibrationa ans zero calibration function, it makes the detection more accurate and reliable.
    • With temperature and pressure compensation, this is able to realize the gas concentration compensation under the conditions of different temperature.
    • Infrared ray controller can remote control the alarm point settings, zero calibration, and address modification.
    • Can output one or two on-off signals, and can drive ventilator, solenoid valve or other external devices.
    • Case is die-cast aluminum

    Fixed NH3 Detector Specification

    Model ATO-YT95H-NH3-A
    Detection Principle Electrochemistry
    Gas Ammonia (NH3)
    Range (Optional) 0 to 50 ppm, 0 to 100 ppm, or 0 to 200 ppm
    Resolution 0.01ppm, 0.1ppm (related to the selected range)
    Accuracy ≤±3% F.S.
    Responce Time ≤10s
    Repeatability ≤±1%
    Recovery Time ≤10s
    Linearity Error ≤±1%
    Zero Shift ≤±1% (F.S./year)
    Signal Output (Optional) 4-20mA, 0-5V, RS485, RS232, or relay
    Alarms Sound, light
    Display High light nixie tube display
    Installation Wall-mounted, piping type, flow-type (according to the detected environment)
    Connection G1/2 male thread explosion-proof flexible pipe
    Operating Time 24h
    Explosion-proof Grade Exia ll CT6
    Protection Grade IP65
    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

    Fixed Gas Detector Dimension (Unit: mm)

    Fixed gas detector with alarm dimension

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

    Gas Range (Default) Range (Optional) Resolution
    Combustible/Flammable Gas (EX) 0-100% LEL 0-100% LEL 1%LEL
    Oxygen (O2) 0-30% Vol 0-25% Vol 0.01%Vol
    Carbon Monoxide (CO) 0-1000 ppm 0-100/500/1000/2000 ppm 0.01ppm/0.1ppm/1ppm
    Hydrogen Sulfide (H2S) 0-100 ppm 0-50/100/500/1000 ppm 0.01ppm/0.1ppm/1ppm
    Methane (CH4) 0-100% LEL 0-100% LEL 1%LEL
    Chlorine (Cl2) 0-10 ppm 0-10/20/50/100 ppm 0.01ppm/0.1ppm
    Hydrogen Chloride (HCL) 0-20 ppm 0-10/20/50/100 ppm 0.01ppm
    Hydrogen (H2) 0-1000 ppm 0-1000/2000/5000/10000 ppm 0.1ppm/1ppm
    Nitric Oxide (NO) 0-100 ppm 0-100/250/500/1000 ppm 0.01ppm/0.1ppm/1ppm
    Nitrogen Dioxide (NO2) 0-20 ppm 0-20/50/100 ppm 0.01ppm/0.1ppm/1ppm
    Formaldehyde (CH2O) 0-10 ppm 0-10/20/-50/100 ppm 0.01ppm/0.1ppm/1ppm
    Ozone (O3) 0-10 ppm 0-1/5/10/20/50/100 ppm 0.001ppm/0.01ppm/0.1ppm
    Carbon Dioxide (CO2) 0-2000 ppm 0-1000/2000/5000/10000/50000 ppm 0.1ppm/1ppm
    Sulfur Dioxide (SO2) 0-20 ppm 0-10/20/100 ppm 0.01ppm/0.1ppm
    Ethylene Oxide (ETO) 0-100 ppm 0-20/50/100/500/1000 ppm 0.01ppm/0.1ppm/1ppm
    Phosphine (PH3) 0-10 ppm 0-10/20/50/100/200/500/1000 ppm 0.01ppm/0.1ppm/1ppm
    Nitrogen (N2) 0-100% Vol 0-100% Vol 0.01%Vol
    Hydrogen Fluoride (HF) 0-10 ppm 0-50 ppm 0.01ppm

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

    Tips: 10 tips for installing fixed type ammonia (NH3) detector

    1. The fixed ammonia (NH3) detector shall not be installed in the place which has high concentration of smoke, jet-propelled insecticide and combustible solvent (coating), otherwise it may cause an alarm.

    2. The fixed ammonia gas detector shall not be installed at the place with large wind flow, such as the vent, ventilator and door. It may affect the accuracy of ammonia detector.

    3. The fixed ammonia detector shall not be installed at the place with much water vapor or water drops (relative humidity is above 90%), otherwise the ammonia sensor may be damaged for being placed in water vapor for a long term.

    4. The fixed NH3 detector shall not be installed at temperatures below -30℃ or below 50℃.

    5. The fixed ammonia detector shall not be installed in a strong electromagnetic field.

    6. As soon as the ammonia detector sends a concentration alarm signal, the output control signal will be locked, even if the gas concentration doesn’t continue to exceed the limit, the controlled device is still unable to restore the pre alarm state automatically, manual reset is required (press the reset button or self-calibration for 3 seconds).

    7. The fixed NH3 gas detector shall be installed in a higher place of the farm because the concentration of ammonia is lighter than the air.

    8. If alarm, the ammonia concentration has exceeded the set alarm concentration. After the cause for excessive NH3 concentration is removed, press the reset button to clear the alarm data.

    9. It’s normal for the alarm sound in the first power-on in case the ammonia detector has been powered off for a long time.

    10. After the ammonia detector is fixed, do not move its position at will, so as not to damage the accessories.

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