Renesas ZMOD4510
Outdoor air quality gas sensor for O3 and NO2
The ZMOD4510 gas sensor platform detects air quality in a variety of indoor and outdoor applications. The module is a 12-pin LGA assembly (standard version 3.0mm x 3.0mm x 0.7mm) that consists of a gas sense element and a CMOS signal conditioning IC. The module’s sense element consists of a heater element on a silicon-based MEMS structure and a metal-oxide (MOx) chemiresistor. The signal conditioner controls the sensor temperature and measures the MOx resistance, which is a function of the gas concentration.
The freely available firmware enables different ZMOD4510 features based on traditional and machine learning algorithms with embedded artificial intelligence (AI) using the same hardware platform. This is used to determine the Air Quality Index (AQI) output, which is based on the gases present. The measurement results can be read via an I2C interface with the user’s microprocessor, which processes the data to determine the levels of gases present and to indicate the AQI based on international standards. With its latest ultra-low power mode, the ZMOD4510 is an excellent choice for detecting ozone and nitrogen dioxide in indoor and outdoor applications.
Features
- Sensor output based on operation method:
- Non-selective measurement of nitrogen dioxide (NO2) and ozone (O3)
- Selective ozone (O3) measurement using ultra-low power
- Supports international standards for air quality, such as the US Environmental Protection Agency (EPA)
- Ultra-low average power consumption down to 0.2mW
- External reset pin (active-LOW)
- Siloxane resistant
- RoHS compliant
- Target operation temperature: -40 °C to +65 °C
- Supply voltage: 1.7V to 3.6V
- Water and dustproof version available (IP67 certified)
- Available assembly sizes:
- 3.0mm x 3.0mm x 0.7mm (standard version)
- 3.0mm x 3.0mm x 0.9mm (IP67 version)
Benefits
- IP67 rated package
- Leading high sensitivity and long term stability allows ppb detection limits
- Smallest sensor in the market enables reduced end product size
- Allows improved energy efficiency without compromising air quality
- Enables rapid customer integration with easy to use precompiled software
- Pre-calibrated sensors save in production costs
Applications
- Wearables
- Home & Building automation systems, including HVAC systems
- Smart fans and damper applications
- City air monitoring stations
- Personal monitors including wearables
Block diagram
Evaluation kit
The ZMOD4510-EVK creates an easy way to evaluate the ZMOD4510 Outdoor Air Quality sensor. While the ASIC inside the sensor module controls the actual MOx and MEMS sensing element, the MCU-based electronic module controls the I²C to USB communication interface. The system may be connected to a Windows PC via a bi-directional USB connection and the sensor may be tested by using the provided evaluation software. The output is shown as a raw signal (resistance), as the measured concentration for ozone and nitrogen oxides combined, and as a standardized outdoor air quality rating based on the US Environmental Protection Agency (EPA).
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