Combo sensor module for air quality measurements.
Sensirion’s SEN5x environmental node is a straightforward, all-in-one sensor solution platform for the accurate measurement of various environmental parameters, such as particulate matter, volatile organic compounds (VOCs), oxidizing gases such as nitrogen oxide compounds (NOx), as well as humidity and temperature. Thanks to proprietary algorithms, the module enables straightforward integration into various applications. This allows device manufacturers to save valuable project time and personnel resources and focus on their core competencies. End customers receive reliable air quality measurement data based on the SEN5x and benefit from improved air quality to increase health and comfort.
Applications
- Air purifiers
- Air quality monitors
- Air conditioners
- HVAC / ventilation systems
STAR engine
When SEN5x is integrated into an end-user product, the resulting thermal behavior can be very complex. A tiny temperature sensor on an unenclosed flex PCB has a negligible thermal mass and couples perfectly to ambient air. It can accurately measure ambient temperature and will be able to react quickly to changes in temperature. In contrast, a built-in sensor module like the SEN5x usually couples weakly to ambient air, has a larger thermal mass and is prone to additional self-heating due to other heat sources close by. This results in slow reaction times when reading changes in ambient temperature, typically in the order of 20–25 minutes for typical air quality monitors when the ambient temperature changes by 5–10°C.
To improve the reaction time and provide a better user experience, Sensirion has developed the “Sensirion Temperature Acceleration Routine” (STAR) engine. This algorithm, which is implemented in the SEN5x range, estimates the value of the temperature dynamically and before the end product reaches a thermally stable state. This allows end users to obtain two to three times faster and more reliable temperature readings from their products.
The SEN5x offers three pre-defined settings for the STAR engine to address different design-in situations, covering air purifiers and indoor air quality monitors.
Technology and benefits
| Technology | Benefits |
|---|---|
| All-in-one environmental node: no co-integration of separate sensor components required | Faster time-time-to-market, lower R&D expenses, bill of material and assembly costs |
| Integrated algorithms: temperature and humidity compensation, VOC/NOx Index calculation | Reliable and trustworthy measurements |
| Optimized and tested air flow channel geometry and proven design-in examples | Fast hardware design |
| Sheath-flow technology combined with high-quality components (incl. SHT4x and SGP40) | Dust-protection and long lifetime |
SEK-SEN5x evaluation kit
The SEK-SEN5x evaluation kit has been designed to help you evaluate Sensirion’s SEN5x environmental nodes easily and cost-efficiently. The kit contains the SEN5x sensor node, which is equipped with particulate matter sensing technology, an SGP41, an SHT4x humidity sensor and a microcontroller featuring VOC and NOx Index, relative humidity and temperature outputs via I²C interface.
The SEK-SEN5x evaluation kit includes two cable sets. The “adapter cable” allows you to connect to a computer via the SEK-SensorBridge, which must be bought separately and can be ordered via one of our distribution partners. Sensirion’s SEK-ControlCenter viewer software can be used for evaluating the sensor. In addition, the kit includes a jumper cable that enables fast prototyping, e.g., through integration into existing platforms (like Arduino, Raspberry Pi, etc.).
Environmental sensing
Environmental conditions have a major impact on our well-being, comfort and productivity. Sensirion’s sensor solutions provide detailed and reliable data on key environmental parameters such as humidity, temperature, volatile organic compounds (VOCs), particulate matter (PM2.5), formaldehyde, NOx and CO2. Environmental sensing opens new possibilities to create smarter devices that improve our comfort and well-being as well as increase energy efficiency in a wide variety of applications. Sensiron can accompany you through the entire product development process, from the initial idea to product launch and beyond. Sensiron’s expertise ranges from prototype construction, design-in support and use-case development to inline testing at the mass production stage.
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