Raspberry Pi HAT measures indoor air quality

August 17, 2020 //By Rich Pell
Indoor air quality sensor HAT for Raspberry Pi
Electronic components distributor Avnet has introduced an indoor air quality sensor HAT (Hardware Attached on Top) add-on board for the Raspberry Pi.

The Avnet-designed evaluation, development, and quick-prototyping tool - called AES-RHSEN-ZM44-G - is intended for engineering professionals who need quick development of commercial, industrial, and heating, ventilation and air conditioning products requiring advanced indoor air quality measurement capabilities.

"The Raspberry Pi HAT form factor provides an ideal platform for all rapid prototyping, evaluation and proof-of-concept products," says Jim Beneke, vice president of products and emerging technologies, Avnet. "Potential applications range from air/health monitoring systems, smart home appliances, smart thermostats, smart speakers and smart fans to smoke alarms, vacuum cleaners, garage openers, security systems, HVAC controls, air purifiers and building automation."

The HAT features an on-board calibrated Renesas ZMOD4410 sensor that measures the concentrations of total volatile organic compounds (TVOCs) from parts-per-billion to parts-per-million and can estimate carbon dioxide (eCO2) levels - important indicators for monitoring indoor air quality. All sensors are electrically and chemically (gas) tested with lab calibration data stored in each ZMOD4410 sensor’s built-in nonvolatile memory.

In addition to the ZMOD4410 sensor, the HAT incorporates a Renesas HS3001 high-precision relative humidity and temperature sensor, along with software-controlled status LEDs. Connection points are also available to measure the ZMOD4410 active current consumption, which is useful when integrating the sensor and its software into products powered by extended life batteries.

Avnet provides a pre-compiled test application that runs on the Raspberry Pi operating system and can measure TVOC and eCO2 out of the box. The application is built with Renesas' proprietary licensed algorithms. For production purposes, customers may obtain the algorithms directly from Renesas under terms of their software license agreement.

The Avnet sensor HAT for Raspberry Pi is available in the Americas now for $49.95.

Avnet


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