The MiCS-2714 is a sensor whose resistance varies in the presence of small concentrations of NO2. This value varies between 2kΩ and 2MΩ approximately, providing high accuracy throughout the output range. Unlike the rest of the board’s gas sensors, which operate at a voltage of 5V, this sensor is powered through a 1.8V voltage regulator, with consumption of approximately 26mA. The sensor’s resistance in air, as well as its sensitivity, can vary between different units, so it is recommended to calibrate each one of them before finally inserting them in the application.
Measurement range: 0.05 ~ 5ppm
Air resistance: 0.8 ~ 8kΩ (typically 2.2kΩ)
Sensitivity: 6 ~ 100 (typically 55, ratio between the resistance at 0.25ppm and in air)
Supply voltage: 1.7 ~ 2.5V DC
Operating temperature: -30 ~ +85ºC
Response time: 30 seconds
Average consumption: 26mA (throughout the complete power supply cycle in one second)
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