Outdoor air quality sensor offers selective ozone detection

Outdoor air quality sensor offers selective ozone detection

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Semiconductor manufacturer Renesas Electronics has expanded its popular ZMOD4510 Outdoor Air Quality (OAQ) gas sensor platform with an IP67-qualified waterproof package and a new AI-based algorithm that enables ultra-low-power selective ozone measurements.
By Rich Pell


The enhanced ZMOD4510, says the company, is the industry’s first fully calibrated, miniature digital OAQ sensor solution with selective ozone measurement capabilities, offering visibility into the air quality in users’ immediate environments for a personalized experience. The enhanced ZMOD4510 can detect specific ozone levels – without reporting on other pollutants – while maintaining power consumption under 200 uW.

This selective measurement capability, says the company, allows devices such as smart watches, phones, and smoke detectors to monitor for harmful ozone gases typically found outdoors but which can drift indoors through open windows and doors. Optimizing the ZMOD4510 for very low power is key to enabling the longer life cycles required for these types of battery-powered devices.

“Measuring outdoor air quality really is about location, location, location, as levels can vary dramatically from street to street and even on opposite sides of the same street,” says Uwe Guenther, Senior Director, Sensing Solutions, IoT and Infrastructure Business Unit at Renesas. “The enhanced ZMOD4510 gives manufacturers the selective high-precision sensing, ultra-small size, and long battery life they need for battery-powered devices like smart watches and phones that offer customers a convenient and customized view of their immediate air quality environment.”

The ZMOD4510’s ability to quantify selective Ozone levels in concentrations as low as 20 parts per billion (ppb) coupled with its low power, small size, and outstanding flexibility, says the company, makes it an ideal solution for mobile and wearable devices, as well as industrial applications such as wireless security cameras and parking meters. The new waterproof packaging allows the sensor to operate in harsh and submersible environments.

The device comes in a 3 x 3 x 0.9-mm LGA package and is shipped fully calibrated in the hydrophobic and oleophobic package. Customers can apply a conformal coating on their circuitry rather than adding an external membrane to the module.

The ZMOD4510 is calibrated to the U.S. Environmental Agency’s (EPA) Air Quality Index for measuring ozone, and is highly resistant to siloxanes, enabling reliability for use in harsh environments. The enhanced ZMOD4510 platform is available now in both a standard and IP67-rated sensor package.

Renesas Electronics

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