MQ-137 Ammonia Gas Sensor

  • Fast Shipping

    Receive products in amazing time
  • Easy Returns

    Return policy that lets you shop at ease
  • Always Authentic

    We only sell 100% authentic products
  • Secure Shopping

    Your data is always protected



  • MQ-137 – Ammonia Gas Sensor
  • Operating Voltage is 5V
  • Can be used to Measure Ammonia, Carbon monoxide
  • Analog output voltage: 0V to 5V
  • Digital Output Voltage: 0V or 5V (TTL Logic)
  • Preheat duration over 24 hours
  • Can be used as a Digital or analog sensor
  • The Sensitivity of Digital pin can be varied using the potentiometer


  • MQ-137 – Ammonia Gas Sensor


  • Detect or measure Gases like NH3 or CO
  • Air quality monitor
  • Gas leak alarm
  • Safety standard maintenance
  • Maintaining environment standards  in hospitals