MQ-9 Carbon Monoxide Fuel Gas Sensor ADC121C 12-Bit ADC I2C Module - (AD80452)

Description:

The MQ-9 gas sensor makes it easy to monitor carbon monoxide and combustible gas concentration levels using our I2C mini-module form factor. The MQ9 is connected to an ADC121C 12-bit analog-to-digital converter, which can expand to 9 gas sensors per I2C port using just two address jumpers (making full use of the floating address system).

The MQ-9 is capable of detecting airborne carbon monoxide concentration levels between 10 and 1000 ppm and airborne combustible gas concentration levels between 100 and 10,000 ppm. The ideal sensing condition for the MQ9 is 20°C ±2°C with 65% ±5% humidity. An internal preheater within the sensor helps achieve ideal sensing conditions, but the datasheet recommends 48+ hours of warm-up time for optimal accuracy. Because of the internal preheater, this sensor requires more current than most of our I2C Mini Modules. We measured 139mA for this I2C mini module, so we highly recommend planning a power strategy so that your I2C master device delivers no less than 150mA per sensor. This sensor comes pre-calibrated to the recommended values in the datasheet; However, a final calibration may be required to obtain accurate measurements, as we do not have the equipment for large-scale calibration of these sensors.

All I2C mini modules are designed to operate at 5VDC. Using a convenient 4-pin socket, devices can be daisy-chained to the I2C bus, eliminating the need for soldering. Simply connect the devices you need for your next automation application. Pull-up resistors are included with all NCD master devices. If you're wiring your own I2C port, integrated 4.7K jumper-selectable pull-up resistors are available for added convenience.

Characteristics:

- I2C Carbon Monoxide Gas Sensor

- Air detection between 10 and 1000 ppm

- Combustible gas sensor

- Communication speed from 100 KHz to 3.4MHz

- I2C Mini Module Form Factor

- MQ9 modular connection plate

Link of interest