Description
The ZMOD4410 Gas Sensor Module is designed for detecting total volatile organic compounds (TVOC), estimating CO2, and monitoring indoor air quality (IAQ) in different smell based use cases, including very humid and dusty applications with the possibility of water spray, condensation, or immersion. It is a 12- LGA assembly (3.0 × 3.0 × 0.7 mm) that consists of a gas sense element and a CMOS signal conditioning IC. The module’s sense element consists of heater element on a Si-based MEMS structure and a metal oxide (MOx) chemiresistor. The signal conditioner controls the sensor temperatures and measures the MOx conductivity, which is a function of the gas concentration. The measurement results can be read via an I2C interface with the user’s microprocessor, which processes the data.

FEATUREs
◾ Sensor output based on AI machine learning algorithmic:
   • Measurement of total organic compounds (TVOC)
      concentrations and indoor air quality (IAQ)
   • Module algorithm estimates carbon dioxide level (eCO2)
   • Algorithm to set a control signal to trigger an external
      action based on IAQ and odor change
   • Algorithm to discriminate sulfur based odors
◾ Heater driver and regulation loop for constant resistance,
   minimizing effect of environmental temperature on signal
◾ Customization for mobile, industrial, and consumer
   applications
◾ Internal auto-compensated temperature sensor; not stress
   sensitive
◾ I2C interface: up to 400kHz
◾ Built-in nonvolatile memory (NVM) for module-specific data
◾ Very low average power consumption down to 1.5mW
◾ Excellent for low-voltage and low power battery applications
◾ No external trimming components required
◾ External reset pin (active-LOW)
◾ Siloxane resistant
◾ RoHS compliant
◾ Supply voltage: 1.7V to 3.6V
◾ Package: 12-LGA
◾ Water and dustproof version available (IP67 certified)
◾ Available assembly sizes:
   • 3.0 × 3.0 × 0.7 mm (standard version)
   • 3.0 × 3.0 × 0.9 mm (for IP67 version)

Typical Applications
◾ Indoor air monitoring
◾ Monitor home, office, personal, and bathroom environments
   for healthy conditions and comfort
◾ Detect hazardous materials and unhealthy conditions
   (e.g., fumes from construction materials)
◾ Automation based on indoor ambient air quality (HVAC, air
   purifiers, thermostats, kitchen hoods, etc.)