1 PC MH-411D NDIR Infrared CO2 Sensor

MH-411D infrared gas sensor is a miniature universal intelligent sensor, which adopts NDIR theory to detect concentration of CO2 in air and has good selectivity, stable performance, long life, also is independent of Oxygen. The inside temperature sensor could be used for temperature compensation. This miniature infrared gas sensor is developed by the tight integration of mature infrared absorbing gas detection technology, micro machine workout and superior circuit design.  Application Widely used for HVAC refrigeration, industrial-process control and safety protection,agriculture and animal husbandry.  Features High sensitivity, high resolution, low power consumption, fast response time Output method: UART, analog voltage signal Temperature compensation, excellent linear output Long lifespan, excellent stability, anti-poisons, anti-vapor interference Specifications Table 1. Main Parameters     Model MH-411D Detection gas CO2 Working Voltage 3.6~5VDC (Need to be powered by safety barrier) Average Current <85mA Detection range 0-10%vol Optional (refer Fig2.) Interface Level 3.0V Output Signal UART 0.4~2V (Need to be powered by safety barrier) Warm-up Time 3 min Response Time T90<30s Working Temperature -20°C ~60°C Working Humidity 0~95%RH (no condensation) Sizes Φ20 mm×22.2 mm Weight 35g Life Time >5 years Defense Grade IP54 Power, communication terminal Intrinsic safety Ui=7.5VDC，Ii=265mA， Pi=0.5W，Ci=10μF，Li=0mH   Table 2. Measuring Range and Resolution Target Gas MeasuringRange Accuracy Note CO2 0~2000 ppm   ±(50ppm + 5% of Read Value) Temperature compensation 0~6000 ppm Temperature compensation 0~1% VOL Temperature compensation 0~3% VOL Temperature compensation 0~5%VOL Temperature compensation   * The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.